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Metal Casting,Custom Casting Metal Parts

Metal Casting,Custom Casting Metal Parts 1

Metal-Casting

Serive: Metal Casting,Custom Casting Metal Parts

Short Description:Die-casting is a metal casting process, which is characterized by using a mold cavity for applying a high pressure molten metal. The mold is usually processed with a higher strength alloy, this process is somewhat similar to injection molding. Most are non-ferrous die-casting, such as zinc, copper, aluminum, magnesium, lead, tin and pewter, and their alloys. Depending on the type of die-casting, requires the use of a cold chamber die casting machine or hot chamber die casting machine.

Material for casting: Aluminium,Zinc,Copper,Brass,Iron

Place of Origin: China, Serve for worldwide customers

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 Experienced products made with technology of Metal Casting

  

  

  

The usual metal for casting mainly include zinc, copper, aluminum, magnesium, lead, tin and pewter, although tpressuring cast iron is very rare, but it is also feasible. Special die-cast metal, including ZAMAK, standard aluminum-zinc alloy and the US Aluminum Association: AA380, AA384, AA386, AA390 and AZ91D magnesium. When various metal casting characteristics are as follows:
Zinc: most likely to die-cast metal, the manufacture of small parts is economical, easy coating, compressive strength, plasticity, long life cast.
Aluminum: light weight, high manufacturing complexity and thin-walled castings dimensional stability, corrosion resistance, good mechanical properties, high thermal and electrical conductivity, high temperature strength remains high.
Magnesium: Easy machining, strength to weight ratio, commonly used in the lightest metal casting.
Copper: high hardness, corrosion resistance, mechanical properties of die-cast metal used best, abrasion resistance, strength close to the steel.
Lead and tin: high density, high dimensional accuracy, corrosion can be used as special parts. Considerations of public health, this alloy can not be used in food processing, storage equipment. Tin antimony alloy (sometimes also contain a little copper) can be used to manufacture handmade type letterpress printing and hot stamping.

  Main Equipments for Custom Metal Casting parts

We specialize in design, research and manufacturing aluminum, copper and zinc alloy casting and forging products, which are  widely used in automotive ,vehicles, ships and machinery, etc.
We have strong techinical force, equipment, testing method and professional personnel . There are chemical element analyzers that can control and analyze product chemical element effectively.
Shot blasting machine,sand blasting machine and vibrative grinder which ensures the quality and surface finish;
Processing center, CNC milling machine,CNC lathe,ordinary lathe and drill press that can strictly control products size and precision.
We are mainly producing according to customer’s drawings or samples,and many thanks for your enquires.

metal-casting-equipments metal-casting-machines

 General Knowledge on “Metal Casting”

Metal Casting Benefits:
1. good quality
High precision casting size, generally the equivalent of 6 to 7, even up to four; good surface finish, usually equivalent to 5 to 8; high strength and hardness, strength than sand casting generally increased by 25 to 30%, but the extension rate reduced by approximately 70%; dimensional stability, good interchangeability; may die casting thin-walled complex castings. For example, the current minimum wall thickness of zinc alloy die castings up to 0.3mm; aluminum alloy castings of up to 0.5mm; the smallest aperture of cast 0.7mm; minimum pitch of 0.75mm.
2. High production efficiency
Machine production rate, such as domestic JⅢ3 horizontal cold air can be die-die-casting machine for eight hours on average 600 to 700, a small hot chamber die-casting machine per eight hours from 3000 to 7000 can; long life type-casting, a pair of die-casting type, bell-casting alloys, life up to hundreds of thousands, or even millions of times; easy mechanization and automation.
3. good economic effect
Because casting precise size, table pan clean and so on. Generally no longer be machined and used directly, or processing capacity is small, so not only improves the metal utilization, and reduces the amount of processing equipment and working hours; casting price will be easy; in combination with other die-cast metal or non-metal materials can be used . Saving metal assembly work and save.

Metal Casting Shortcoming
1) Because the liquid metal die-filled cavity high speed, flow regime is unstable, so the use of general-casting method, the casting is easy to produce pores, can not be heat;
2) on the concave complex castings, casting more difficult;
3) melting point alloys (such as copper, ferrous metals), the lower die-type life;
4) should not be small batch production, the main reason is the high cost of die-based manufacturing, die-casting machine production of high efficiency, small batch production uneconomical.

The biggest drawback is the cost of die-cast high. Casting equipment and molds, die casting method relative to other related components for all expensive. So when the production of a large number of products manufactured before casting more economical. Other disadvantages include: This process applies only to the higher mobility of metals and casting quality must be between 30 g and 10 kg.In the conventional die-casting, the casting of the last batch of castings always have pores. Thus any heat treatment or welding can not be performed, because the gas within the gap will be expanded under the action of heat, resulting in the release of micro-defects and internal surfaces.

Submit drawings for Customing Metal Casting Parts,Let Smartclima manufacture it for you

order procedures for casting

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Impact Extrusion Metal Parts

Impact Extrusion Metal Parts 3

Impact Extrusion Metal Parts

Service: Impact Extrusion Metal Parts,Save material,Improve product performance

Impact Extrusion Aluminium Parts
Impact Extrusion Carbon Steel Parts
Impact Extrusion Copper Parts
Impact Extrusion Brass Parts

Short Description:Impact Extrusion,also named cold extrusion,cold forming,is a process to use huge force to let the material forming and extrusion,including to extrusion metal housing,socket,bushing,sleeve,and so on.They are usually as machinery parts, auto parts, construction parts…The technology of Impact Extrusion not only save materials,but also increase product`s density&performance.Material can be Aluminium,Copper,Brass,Carbon Steel,Zinc,etc;Our extrusion machine is from 100 to 1000 Tons,it can extrude the metal partsup to 6″ Diameter and Up to 30″ in Length.The machine strokes from 5″ to 30″,Speeds from 13 SPM to 65 SPM.

Shape & Size: according to drawing;

Place of Origin: China,Service to World;

Want “Impact Extrusion Metal Parts”? Inquiry or Order it!
 Experienced products made with technology of Impact Extrusion Metal Parts

Impact Extrusion Metal Parts, also named cold extrusion, cold heading, is cold working, a process of metal defroming working and material forming, is carried out at a normal temperature. The material for cold forging are mostly small, better deforming ,mainly are aluminum alloys, copper and some alloys, low carbon steel, carbon steel, low alloy steel. The product surface with cold forging manufacturing is high quality, high dimensional accuracy, can replace some of the cutting. It makes material strengthen and improve the strength of the parts.

Impact Extrusion Metallic Parts Metal  Impact Extrusion accessory Impact Extrusion machines cold Extrusion equipments Impact Extrusion technology

 Benefits of Impact Extrusion Metal Parts

Material and Process Cost Advantages:

See below charts to check how much you can save if made with Impact Extrusion technology:

Impact Extrusion save material

The Result: Metal Cold Forging can be lower Costs of Product to the Customer

Impact Extrusion is Speedy and Fast production

Depending on the dimension of the metal part,the average production speed can reach 3000-4000pcs per hour(with feed material auotmatically).

The product by impact extrusion is tough

The affected part is a fully wrought, dense, and also porous-free structure. Grain placement is extremely uniform, passing on optimal toughness and also strength. This metallurgical problem could not be safeguarded by casting or by machining a functioned bar.

Impact Extrusions Are high density and strong

The non- heat treatable alloys are work solidified by affecting. The warmth treatable alloys could be warmth dealt with in typical fashion after influencing. A few of the warmth treatable alloys, consisting of a number in the 6 as well as 7 thousand series, are offered 60 % of their maximum heat dealt with as well as aged properties by influencing alone.

Impact Extrusions are smooth and clean

There is no flash to be machined as well as no sand to be taken out. There is no scale and there are no parting lines. Finishing is often unneeded. Typically, impact extrusions are made from alloy 1100 come out of the press with indoor surface areas ranging from 16 to 32 micro inch and outside surface areas varying from 32 to 63 micro inch. Effects have absolutely no draft angles.

Impact Extrusion is saving material

Effort as well as steel cost savings alone are major when compared to casting and machining. The aluminum slug from which the impact is formed may be so accurately sized that no steel need be cut from the contended effect. in could instances the expense of a finished effect is less compared to the expense of the bar stock from which it could have been machined.

Impact Extrusion avoid further Machining

Impact extrusion could change machined elements directly in many styles. In several others influences are made use of to lessen machining expenses. When stress requires a wrought aluminum part, excess metal as well as equipment time could be lessened by offering the machinist with an influenced blank.

 Contact us to Customize Impact Extrusion Metal Parts

Submit drawings for Impact Extrusion Metal Parts,Let Metalhelper manufacture it for you.

procedures for metal cold forging parts

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application of Impact Extrusion Metal Parts

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Zinc cold forging parts,Cold heading Zinc accessory

Zinc cold forging parts,Cold heading Zinc accessory 5

Zinc cold forging parts,Cold heading Zinc accessory

Service: Zinc cold forging parts-Cold heading Zinc accessory

Short Description:Using compressive force equipments to manufacture and form Zinc parts,including to forge Zinc screws,sockets, bolts, power nuts, non-standard hardware parts,Zinc machinery parts, auto parts, construction parts,ground pins,sleeve bushing, rivets,housing,etc.Adopting technology of cold forging/cold heading,not only save materials,but also increase density,and improve item`s performance.

Shape & Size: Customized according to drawing;

Place of Origin: China,Service to World;

Want “Zinc cold forging parts”? Inquiry or Order it!
 Experienced products made with technology of Cold Forged

Metal Cold Forging, also named cold extrusion, cold heading, is cold working, a process of metal defroming working and material forming, is carried out at a normal temperature. The material for cold forging are mostly small, better deforming ,mainly are aluminum alloys, copper and some alloys, low carbon steel, carbon steel, low alloy steel. The product surface with cold forging manufacturing is high quality, high dimensional accuracy, can replace some of the cutting. It makes material strengthen and improve the strength of the parts.

zinc cold forging parts,Cold heading zinc accessory cold forging zinc parts and accessory zinc cold forging equipments CNC controling zinc cold forging parts machines to zinc forging

 Benefits of metal cold forging

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold forming,which help you to get significant cost savings.

  • Metal Cold Forging improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Metal Cold Forging save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Metal Cold Forging improve part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,Cold Forging represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold forging technology:

cold forging save materials

The Result: Metal Cold Forging can be lower Costs of Product to the Customer

Better Quality and Consistency: Cold Forming/Forging is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating
 General Knowledge on material “Zinc”

(1) galvanized zinc with excellent resistance to atmospheric corrosion, at room temperature, the surface is easy to generate a protective film, and therefore the biggest use of zinc for galvanizing industry. Is mainly used for surface coating of steel and steel parts (such as galvanized sheet), widely used in automotive, construction, shipbuilding, light industry and other industries. After the start of the 21st century, the Western countries try to do directly with zinc alloy plate roof covering material, the use of life up to 120-140 years, and then recycled, but for the life of galvanized iron roofing material is generally 5-10 years . After 21 centuries, hot-dip galvanized steel with significant growth. Galvanized also used, but this method is generally used for thin coatings and different surface finish. Coatings containing zinc coating is another way; for the object of continuous contact with water, such as for ships, bridges, and offshore oil and gas derrick large steel components, zinc only, and large blocks of connection, you can be protected, but zinc block should be changed regularly.
(2) zinc alloy for automotive and machinery industries. Zinc has suitable mechanical properties. Zinc itself is not high strength and hardness, but after adding alloying elements aluminum, copper, etc., its strength and hardness are greatly improved, still it is the emergence of zinc and copper alloy, and its mechanical properties have been approached or reached the aluminum, yellow copper levels of gray cast iron, and its creep resistance is also significantly improved. Therefore, zinc and copper alloy has been widely used in hardware production. Mainly for die casting, automotive, construction, part of the electrical equipment, household appliances, toys and other parts production. Many processing properties of zinc alloys are relatively good, pass processing rate of up to 60% -80%. MV superior performance, can be deep-drawing, and having a self-lubricating, extended die life, available brazing or resistance welding or electric arc welding (for an in helium) welding, surface can be plated or coated, good cutting performance. Under certain conditions, with excellent superplasticity. Zinc and copper, tin, lead composed of brass, used in machinery manufacturing. Zinc plate containing a small amount of lead and cadmium and other elements can be made negative zinc-manganese batteries, zinc printing plates, there are pink corrosion photographic system board and offset printing plates.
(3) can be used to produce zinc batteries. For example: manganese batteries and zinc-air batteries latest research.

Zinc has good resistance to electromagnetic properties. Electrical conductivity of 29% zinc standard electrical copper, in the case of RF interference, zinc plate is a very effective shielding material, and because the zinc is non-magnetic, and instrumentation suitable for housing materials and parts instruments coins, Meanwhile, zinc and other metals collision itself and does not spark, suitable for underground explosion-proof equipment. Widely used in rubber, paints, enamels, pharmaceutical, printing, fiber and other industries. Zinc with appropriate chemical properties. Zinc can occur with NH4CI, release H + positive ions. Zinc – is the use of zinc-manganese dioxide battery of this feature, made with zinc alloy battery case, both the battery electrolyte container, also participated in the anode cell reaction constitute battery. It’s this performance is also widely used in the pharmaceutical industry. Zinc and acid or alkali can react hydrogen. Zinc fertilizer (zinc sulfate, zinc chloride) can promote plant cell respiration, carbohydrate metabolism and so on. Zinc, lithopone, zinc chrome yellow pigments can be used. Zinc oxide can also be used in medicine, rubber, paint and other industries.

 Contact us to Customize Zinc cold forging parts,Cold heading Zinc accessory

 Submit drawings for Zinc Cold forging,Let Metalhelper manufacture it for you.

Let Metalhelper to help you process/manufacture Aluminium cold forging parts,Cold heading aluminium accessory,Please send us the meassage with drawing or sample photo,and tell us your purchased quantity in first order,and then we`ll quote to you. The more details on product you provide,the more quick we can quote. You also can visit  http://www.metalhelper.com to contact Metalhelper company directly for Metal Extrusion Fabrication business

procedures for metal cold forging parts

Request Quotation for Zinc Cold Forging,Let China metal factory serve for you:

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Brass cold forging parts,Cold heading Brass accessory

Brass cold forging parts,Cold heading Brass accessory 7

Brass cold forging parts,Cold heading Brass accessory

Service: Brass cold forging parts,Cold heading Brass accessory

Short Description:Using compressive force equipments to manufacture and form brass parts,including to forge brass screws,sockets, bolts, power nuts, non-standard hardware parts, machinery parts, brass auto parts, construction parts,ground pins,sleeve bushing, rivets,housing,etc.Adopting technology of cold forging/cold heading,not only save materials,but also increase density,and improve item`s performance.

Shape & Size: Customized according to drawing;

Place of Origin: China,Service to World;

Want “Brass cold forging parts”? Inquiry or Order it!
 Experienced products made with technology of Cold Forged

Metal Cold Forging, also named cold extrusion, cold heading, is cold working, a process of metal defroming working and material forming, is carried out at a normal temperature. The material for cold forging are mostly small, better deforming ,mainly are aluminum alloys, copper and some alloys, low carbon steel, carbon steel, low alloy steel. The product surface with cold forging manufacturing is high quality, high dimensional accuracy, can replace some of the cutting. It makes material strengthen and improve the strength of the parts.

Brass-cold-forging-parts  brass cold forging equipments CNC controling brass cold forging parts machines to brass forging

 Benefits of metal cold forging

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold forming,which help you to get significant cost savings.

  • Metal Cold Forging improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Metal Cold Forging save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Metal Cold Forging improve part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,Cold Forging represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold forging technology:

cold forging save materials

The Result: Metal Cold Forging can be lower Costs of Product to the Customer

Better Quality and Consistency: Cold Forming/Forging is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating
 General Knowledge on material “Brass”

Brass is an alloy of copper and zinc composed. If only by copper, zinc composition of the brass called ordinary brass. Brass is often used in the manufacture of valves, pipes, air conditioning inside and outside the connecting pipe and radiator.

Ordinary brass. alloy of copper and zinc. When the zinc content of less than 35% of zinc can be dissolved to form a single-phase copper a, known as single-phase brass, plastic, suitable for hot and cold pressure processing.
When the zinc content of 36% ~ 46% of the time, there is also a single-phase β with copper and zinc-based solid solution, called duplex brass, β phase decreases the tensile strength of the plastic to make brass rose, only suitable hot pressure processing
If you continue to increase the zinc content, the tensile strength decreased, no use value
Code with “H + digital” represents, H is brass, numbers indicate the mass fraction of copper.
H68 expressed as the amount of 68% copper, 32% zinc, brass, cast brass in front codenamed “Z” word, as ZH62
Zcuzn38 expressed as zinc content of 38%, the balance being copper, brass casting.
H90, H80 single-phase, golden yellow, it has a total gold Moreover, he called plating, decorations, medals and so on.
H68, H59 brass are biphasic, widely used in structural parts on appliances, such as bolts, nuts, washers, springs, etc.
In general, cold deformation with single-phase brass hot deformation processing phase brass.

Special brass. Adding other alloying elements in general composed of multi-brass alloy called brass. Often adding elements lead, tin, aluminum, etc., and accordingly may be called leaded brass, tin, brass, aluminum and brass. The purpose of adding alloying elements. Mainly to improve the tensile strength improved manufacturability
Code: for “H + main element symbol (except for zinc) + mass fraction of copper + main element mass fraction + other elements mass fraction” said.
Such as: HPb59-1 represents the mass fraction of 59% copper, containing the main element of lead content of 1%, and the balance of lead zinc brass.

Pressure processing performance

α single-phase brass have good ductility (from H96 to H65), can withstand hot and cold processing, but α single-phase brass prone to temperature brittle when hot forging process, the specific temperature range varies with different amounts while Zn the changes, generally between 200 ~ 700 ℃. Therefore, thermal processing temperature should be higher than 700 ℃. The main reason for the single-phase α brass brittle zone temperature is in the Cu-Zn alloy system α phase region exists Cu3Zn and Cu9Zn two ordered compounds, occurs when the low temperature heating and orderly transition, the alloy brittle; in addition , the presence of trace amounts of lead alloys, bismuth harmful impurities form low melting point eutectic with copper film distributed in the grain boundary, resulting in intergranular cracking during hot working. Practice shows that the addition of small amounts of cerium can effectively eliminate temperature brittleness.
Two-phase brass (from H63 to H59), in addition to the alloy has good plasticity α phase, also appeared by electronic compound CuZn-based β solid solution. β-phase having a high plasticity at high temperature, low temperature and β ‘phase (ordered solid solution) hard and brittle nature. Therefore, (α + β) brass should be forged in the hot state. Zinc is greater than 46% to 50% of the β brass due to hard and brittle properties, the pressure can not be processed.

Mechanical Properties

Brass, zinc due to the different mechanical properties are not the same. For α brass, with the increase in zinc content, σb and δ are constantly increased. For the (α + β) brass, when the zinc content increased approximately 45%, room temperature strength continues to increase. If more further increase the zinc content, since the alloy structure appears more brittle r phase (Cu5Zn8 compound-based solid solution), a sharp decrease in strength. (Α + β) brass is always room temperature ductility with increasing zinc content decreases. So more than 45% zinc and zinc alloy no practical value.
Ordinary brass band extremely versatile as tanks, water supply and drainage, medals, bellows, serpentine tube, condenser, shell casings and a variety of complex shape of the red products, hardware and other items. With increasing zinc content from H63 to H59, they could well withstand thermal processing, machinery and electrical appliances used for a variety of parts, stamping parts and musical instruments, etc..

 Contact us to Customize Brass cold forging parts,Cold heading aluminium accessory

 Submit drawings for Brass Cold forging,Let Metalhelper manufacture it for you.

Let Metalhelper to help you process/manufacture Brass cold forging parts,Cold heading brass accessory,Please send us the meassage with drawing or sample photo,and tell us your purchased quantity in first order,and then we`ll quote to you. The more details on product you provide,the more quick we can quote. You also can visit  http://www.metalhelper.com to contact Metalhelper company directly for  business

procedures for brass cold forging parts

Request Quotation for Brass Cold Forging,Let China metal factory serve for you:

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Copper cold forging parts,Cold heading Copper accessory

Copper cold forging parts,Cold heading Copper accessory 9

Copper cold forging parts,Cold heading Copper accessory

Service: Copper cold forging parts,Cold heading Copper accessory

Short Description:Put copper disc into the forcing equipments to manufacture and form copper parts,including to forge copper screws,sockets, bolts, power nuts, non-standard hardware parts, machinery parts, copper auto parts, construction parts,ground pins,sleeve bushing, rivets,housing,etc.Adopting technology of cold forging/cold heading,not only save materials,but also increase density,and improve item`s performance.

Shape & Size: Customized according to drawing;

Place of Origin: China,Service to World;

Want “Copper cold forging parts”? Inquiry or Order it!
 Experienced products made with technology of Cold Forged

Metal Cold Forging, also named cold extrusion, cold heading, is cold working, a process of metal defroming working and material forming, is carried out at a normal temperature. The material for cold forging are mostly small, better deforming ,mainly are aluminum alloys, copper and some alloys, low carbon steel, carbon steel, low alloy steel. The product surface with cold forging manufacturing is high quality, high dimensional accuracy, can replace some of the cutting. It makes material strengthen and improve the strength of the parts.

Copper-cold-forging-parts Copper cold forging equipments CNC controling Copper cold forging parts machines to Copper forging

 Benefits of metal cold forging

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold forming,which help you to get significant cost savings.

  • Metal Cold Forging improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Metal Cold Forging save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Metal Cold Forging improve part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,Cold Forging represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold forging technology:

Copper cold forging save materials

The Result: Metal Cold Forging can be lower Costs of Product to the Customer

Better Quality and Consistency: Cold Forming/Forging is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating
 General Knowledge on material “Copper”

Copper can be divided into: general copper (T1, T2, T3, T4), oxygen-free copper (TU1, TU2, and high-purity, oxygen-free vacuum), deoxidized copper (TUP, TUMn), add a small amount of special copper alloy elements (arsenic and copper, tellurium copper, silver and copper) into four categories. Copper electrical and thermal conductivity second only to silver, widely used in the production of electrical conductivity, thermal equipment. Copper has good corrosion resistance in the atmosphere, water and certain non-oxidizing acid (hydrochloric acid, sulfuric acid), alkali, salt solutions and a variety of organic acids (acetic acid, citric acid) in.

Ordinary performance

Comparison of pure copper is a copper, copper generally can be approximated that is, electrical conductivity, plasticity are better, but the strength, hardness some poor. Copper has excellent thermal conductivity, ductility and corrosion resistance. Copper trace impurities have a serious impact on the electrical conductivity, thermal conductivity of copper. Wherein a significant reduction of titanium, phosphorus, iron, silicon and other electrical conductivity, and cadmium, zinc, etc. are little effect. Sulfur, selenium, tellurium and other solid solubility in copper is very small, can generate a brittle compound with copper, the conductive little effect, but can reduce the processing of plastic.
Copper in the atmosphere, water and certain non-oxidizing acid (hydrochloric acid, sulfuric acid), alkali, salt solutions and a variety of organic acids (acetic acid, citric acid), there are good corrosion resistance, for the chemical industry. In addition, copper has good weldability, may be cold, processed into a variety of thermoplastic semi-finished and finished products. 1970s, copper production exceeded the total output of other types of copper alloys.

Physical Properties

Copper trace impurities have a serious impact on the electrical conductivity, thermal conductivity of copper. Wherein a significant reduction of titanium, phosphorus, iron, silicon and other electrical conductivity, and cadmium, zinc, etc. are little effect. Oxygen, sulfur, selenium, tellurium and other solid solubility in copper is very small, can generate a brittle compound with copper, the conductive little effect, but can reduce the processing of plastic. When heated in a hydrogen-containing ordinary copper or a reducing atmosphere of carbon monoxide, hydrogen or carbon monoxide easy cuprous oxide with grain boundaries (Cu2O), thus producing a high pressure steam or carbon dioxide gas, copper can rupture. This phenomenon is often referred to as copper “hydrogen disease.” Oxygen for welding copper harmful. Bismuth or lead generation low melting point eutectic with copper, the copper heat generated brittle; and brittle when a thin film of bismuth was distributed at the grain boundaries, and also allows the copper to produce crisp cold. Phosphorus can significantly reduce the conductivity of copper, but copper solution can increase mobility, improve weldability. The right amount of lead, tellurium, sulfur, etc. can improve machinability. Room temperature tensile strength of annealed copper sheet was 22 to 25 kgf / mm 2 and an elongation of 45 to 50%, and Brinell hardness (HB) of 35 to 45.

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Aluminium cold forging parts,Cold heading aluminium accessory

Aluminium cold forging parts,Cold heading aluminium accessory 11

Aluminium cold forging parts,Cold heading aluminium accessory

Service: Aluminium cold forging parts,Cold heading aluminium accessory

Short Description:Using compressive force equipments to manufacture and form aluminium parts,including to forge aluminium screws,sockets, bolts, power nuts, non-standard hardware parts, machinery parts, auto parts, construction parts,ground pins,sleeve bushing, rivets,housing,etc.Adopting technology of cold forging/cold heading,not only save materials,but also increase density,and improve item`s performance.

Shape & Size: Customized according to drawing;

Place of Origin: China,Service to World;

Want “Aluminium cold forging parts”? Inquiry or Order it!
 Experienced products made with technology of Cold Forged

Metal Cold Forging, also named cold extrusion, cold heading, is cold working, a process of metal defroming working and material forming, is carried out at a normal temperature. The material for cold forging are mostly small, better deforming ,mainly are aluminum alloys, copper and some alloys, low carbon steel, carbon steel, low alloy steel. The product surface with cold forging manufacturing is high quality, high dimensional accuracy, can replace some of the cutting. It makes material strengthen and improve the strength of the parts.

Aluminium cold forging parts,Cold heading aluminium accessory cold forging Aluminium parts and accessory Aluminium cold forging equipments CNC controling Aluminium cold forging parts machines to aluminium forging

 Benefits of metal cold forging

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold forming,which help you to get significant cost savings.

  • Metal Cold Forging improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Metal Cold Forging save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Metal Cold Forging improve part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,Cold Forging represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold forging technology:

cold forging save materials

The Result: Metal Cold Forging can be lower Costs of Product to the Customer

Better Quality and Consistency: Cold Forming/Forging is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating
 General Knowledge on material “Aluminium”

Aluminum is a silvery-white light metal. Malleable. Goods often made cylindrical, rod, sheet, foil, powder, strip and filamentous. In humid air can prevent the formation of a layer of metal oxide film corrosion. With acid-treated aluminum heat can burn fiercely in the air and emit blinding white flame. Soluble in dilute sulfuric acid, dilute nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water, but hot water may be slowly and aluminum hydroxide produced by the reaction [4], the relative density of 2.70, an elastic modulus 70Gpa, poise loose than 0.33. Melting point of 660 ℃. Boiling point 2327 ℃. Its light, good electrical and thermal conductivity, oxidation resistance and high reflectance is widely used. Daily dish made of aluminum is usually called the “steel fine” or “grades.” Al at (room temperature), the thermal expansion coefficient of 25 ℃ 0.0000236mm / ℃ or 23.6ppm * k-1.
The physical properties of the conductivity of aluminum is approximately 62% copper, 33% copper density. Under the same conditions as the resistor, the volume ratio of copper and aluminum is 0.618, a weight ratio of 2.03. Visible, if the aluminum and copper, respectively, than the diameter of the area and a large 38.2% copper conductors and 21.5%, while only half the weight of copper. Factors affecting the performance of aluminum impurities, such as chromium, lithium, manganese, vanadium. They will greatly reduce the conductivity of aluminum (see figure). Iron, aluminum silicon can be slightly improved tensile strength, but the ductility of the aluminum decrease, increased brittleness. In aluminum fill plus a small amount of magnesium (or other elements) can be made of an alloy, significantly improve the tensile strength and heat resistance. This aluminum conductor steel-reinforced aluminum can be used instead of overhead transmission line conductors. Work hardening of aluminum can improve the tensile strength of aluminum, machining deformation and annealing temperature control can be obtained with a different mechanical properties of hard, semi-hard and soft aluminum. Low temperature aluminum tensile strength, fatigue strength, hardness and elastic modulus increased, nor low temperature brittleness, it is suitable for low-temperature conductors. Since the creep limit and tensile strength of aluminum is temperature dependent. Therefore, long-term working temperature should be below the aluminum element 90 ℃, short-term operating temperature of not more than 120 ℃. Aluminum at room temperature in the air easily oxidized to form a dense and rugged thin film layer, it can prevent oxidation deep inside, play the role of corrosion protection

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Let Metalhelper to help you process/manufacture Aluminium cold forging parts,Cold heading aluminium accessory,Please send us the meassage with drawing or sample photo,and tell us your purchased quantity in first order,and then we`ll quote to you. The more details on product you provide,the more quick we can quote. You also can visit  http://www.metalhelper.com to contact Metalhelper company directly for Metal Extrusion Fabrication business

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Metal cold heading

Metal cold heading 13

Metal cold heading

Service:Metal cold heading,Metal impact heading

Short Description: Manufacture metal products with cold heading(or named impact heading) technology according to customer`s drawing or sample;

Material: Aluminium,Copper,Brass,Steel,Stainless Steel,etc;

Shape & Size: Customized according to drawing;

Place of Origin: China,Do Metal cold heading to World;

Want “Metal cold heading Items”? Inquiry or Order it!
 What can we do for you?–Metal cold heading

cold-impact-heading-parts cold-heading-machine

 Benefits of Metal cold heading

Most of machined parts could be re-designed and re-manufactured  to be parts made by technology of cold heading,which help you to get significant cost savings.

  • Improve production effience and reduced Production costs:Because of using high speed manufacturing process. The speed reaches range from 10 pieces per minute for low volume large press work to to 450 pieces per minute on the cold heading process.
  • Save material cost: Compared to a traditional machining process, cold forming process  can save up to 70%.
  • Better control product tolerance: compared to more expensive machining processes,less tolerance can be achieved throughout the production process by coldforming
  • Higher and better quality surface: compared to conventional machined surfaces ,cold forming process can get result . The cold forming process can eliminate the need for costly secondary operations, such as welding, machining, etc, with careful product and process design,
  • Improved part performance and characteristics: due to the metal deformation resulting in improved grain structure, while work hardening can yield significantly improved product performance,cold forming process can improve metal part performance and its characteristics.

For many OEMs,cold heading represents clear opportunities for cost savings over traditional large component manufacturing methods.

Material and Process Cost Advantages:

See below charts to check how much you can save if made with cold heading technology:

cold-heading to save material

The Result: Lower Costs of Product to the Customer

Better Quality and Consistency: cold heading is a purely mechanical process that forms metal into net or near net shapes, but unlike traditional alternatives, it is performed at room temperature without using additional heat, providing more precise tolerances and part to part consistency than any other method.

The products made with Cold Forging:

  • Higher Strength: Cold forming work hardens the material raising its yield stress, making it significantly stronger than can be produced through other methods. With these higher strength properties, component design thickness can often be reduced offering further savings on weight, material and clearance.
  • Higher yields for exceptional strength
  • Most precise tolerances available
  • Improved physical properties by refining grain structure
  • Exceptional surface finish no scale
  • Part-to-part uniformity/repeatability
  • Better functional reliability
  • Reduced/eliminated machining & waste
  • May eliminate subsequent heat treating

Advantages of cold heading

Speed Depending upon the size and complexity of the part and the nature of the equipment of producing them, production rates of 4000 pieces per hour can be achieved.
Economy When compared to casting and machining labor the metal savings alone justify the conversion to an impact extrusion.In some cases when the aluminum slug is sized accurately, little or no trimming or other secondary operations are required.
Strength The impact process naturally work hardens non-heat treatable alloys, while the heat treatable alloys can be heat treated in normal fashion after processing.
Toughness The impact extruding process produces parts that are dense and porous-free in structure. This condition cannot be obtained in a casting process or by machining of a bar material.
Versatility After impacting, the product can be treated the same as any other piece of material. Secondary operations such as machining, grinding, welding, bending, plating or anodizing can be performed in the same way as any other piece manufactured by a more conventional process.
Consolidation Impacts can directly replace machined components, or welded or riveted assemblies, in many designs. The process often reduces product costs for secondary machining operations and in many cases increases the strength of a product that was previously an assembly.
 General Knowledge on “Metal Impact Extruding”

cold forging parts

What is Mtal Cold Heading Process?

Cold heading,also named impact heading,is volume specific and the process uses dies and punches to convert a specific “slug” or blank of a given volume into a finished intricately shaped part of the exact same volume.

Cold Heading process means to adopt quick automative “part formers” or “cold-headers” to cut off and push into or transform a metal wire or metal bar into a shaped die, then, in an outward direction,the protruding end is upset. Through the above process, the metal wire(bar) is shaped on the same axis and it always involves to change a diameter from the original wire size as an extrusion.It can do repetitive and tight tolerances by using a special tooling succession at a quick speed up to four hundred times every minute.It is a high efficient technology to manufacture metal fasteners,screws,nuts and custom various of metal parts and components according to your drawings or samples.

The secondary process after Metal cold heading:

Though metal parts coming from cold heading process are usually complete or near to be finished with very small minimal scrap, generating significant raw material savings compared to traditional screw machining process,it always still is used as the primary manufacturing process which produce as simple as a screw/nut blank. The part then always comes with secondary process including polishing,maching,etc to achieve more high precision part configuration with good tolerances grade.The best commen secondary process are:

  1. Heat Treatment. To achieve a desired result such as hardening or softening of a material. Heat Sometimes,heating and cooling are done for the specific purpose of altering properties intentionally, they often occur incidentally during forming.
  2. Polished.To polish the cold forming product,usually,they will be sprayed with mini stainless steel ball in a closed room,then all scraps,oils,burrs will be removed.
  3. machined or lathing.Machining process is usually to make screw thread or make a horizontal hole on the cold forming product.As cold forming process itself is diffcult to make thread or horizontal hole.
  4. Anodic oxidation or electroplating.After all processes are finished,some products are required to do electroplating.If the product is made from aluminium,it is always required to do anodic oxidation

Typical Design Considerations for Cold Heading Parts

cold-form-designs

The below designs are some typical metal part which are always to manufactured by the cold heading process :

  • Metal Hexagonal Head
  • Metal Round Head&Square Head
  • Round Head with Slit
  • Radial Slot & Recessed Drive
  • Double Reverse Extrusion
  • Diameter Reduction
  • Cylindrical Extrusion
  • Offset, Pierced and Embossed
  • Multi-Diameter Extrusion
  • Carriage Bolt
  •   Offset Head
  • Lugs&Collar

Material for cold heading process

Usually,the following metal are always to do cold heading processs:

  • Brass or Bronze
  • Copper
  • All kinds of Aluminum
  • Carbon Steels wire or bar
  • Stainless steel
  • Alloy Steel
  • Nickle Alloys
  • ……

With the development of computer and cold heading process machines, cold heading design capabilities will be more and more and “endless.”

Cold heading`s metallic materials requirements

1, the mechanical properties of metallic materials for cold heading request
According to metal cold heading process characteristics,here is the requirement on the mechanical properties of the steel:
1) Yield strength Re and deformation resistance should be as low as possible, it let the unit deformation force to be reduced accordingly, to extend the life of the die;
2) cold deformation performance of meterial should be good, that means the materials should have good plasticity performance, lower hardness, which can let product avoid cracking in a large degree of deformation . For example,when you are going to cold head high strength bolts ,you can use carbon steel which has higher carbon content, also can use low carbon steel, low alloy steel. If increase carbon content in the metal, it will increase the hardness, decrease plasticity performance, to let cold deformation performance reduce. But if you add a small amount of alloying elements (such as adding a small amount of boron 10B21,10B33 steel) in low carbon steel, the steel can significantly be improved the strength to meet the performance requirements of the product ,and without compromising its cold deformation properties;
3) It`s better to have the lower sensitivity of the work-hardening materials, so that it can avoid too large deformation force. The work hardening sensitivity of the available material can be reflected by the deformation resistance – strain curve slope. The larger the slope, the higher the hardening sensitivity. Such as stainless steel 0Cr18Ni9 (SUS304),it has the maximum slope of the curve. The hardening sensitivity of this material is more intense, as the deformation increases, the deformation resistance rise sharply.
The performance of the mechanical properties of steel not only t billets original Rm, Re, A, Z and hardness and other indicators, affected not only by the chemical composition of raw materials, macroscopic tissue microstructure, etc., but also by the material preparation process drawing various channels and also affect by heat treatment process between.

2,Requirements on chemical constituents.
⑴ carbon (C) is the most important element to effect carbon steel`s cold plastic deformation . The more carbon content, the higher the strength of steel,but the lower plasticity performance. Each carbon content increased by 0.1%, the yield strength Re improve 27.4MPa, tensile strength Rm increase (58.8-78.4MPa), while the lower elongation A 4.3% reduction of Z 7.3% lower. When the carbon content of steel <0.5%, manganese content of <1.2%, reduction of Z = 80%, the unit is cold deformation force P and the steel containing C, Mn approximate relationship between the amount as follows:
P = 1950C + 500Mn + 1860 (MPa) …………………… (1)
You can see, the carbon content of the steel for cold plastic deformation properties is significant. In the actual process,the metal cold heading extruding steel carbon content is greater than 0.25%, it is required to have the best annealing steel plastic tissue – a spherical pearlitic structure. For the degree of deformation of 65% -85% of the cold heading fasteners without intermediate heat treatment is performed three times upsetting deformation, the carbon content should not exceed 0.4%. When the carbon content exceeds 0.3% -0.5% in the carbon steel, it is necessary to increase the use of intermediate or adopt process of full annealing,or use warm heading.
⑵ The role of manganese (Mn) steel with iron smelting .
(Mn + FeO + MnO + Fe) mainly for steel deoxidation to join. Manganese in steel acts with iron sulfide (Mn + FeS + MnS + Fe), can reduce harmful sulfur to steel performance. The Manganese sulfide formed can improve the machinability of steel/metal. Manganese let steel strength increase, decrease plasticity,it is unfavorable for cold plastic deformation properties , but the impact of manganese on the deforming force is only about a quarter of carbon. Due to the special performance requirements of the finished product, allowing for the sulfur content of manganese five times. In addition to the special requirements of the finished product, but should not exceed 0.9%.
⑶ silicon (Si)
silicon is the deoxidizer`s residues in steel smelting . When the silicon content in steel increased by 0.1%, the increase 13.7mpa. Experience has shown that when the silicon content of more than 0.17%, and greater carbon content, has a great influence on the plasticity of lower steel. Appropriate increase in silicon content in the steel, mechanical properties of steel, especially advantageous elastic limit, can also enhance corrosion resistance of steel. But when silicon steel exceeds 0.15%, so that the formation of non-metallic inclusions sharp steel, high silicon steel annealing does not even soften dramatically reduced cold plastic deformation properties of steel. If silicon is present in the steel in the form of silicic acid, the dispersion of the fine particles in the steel will be too worn mold. Therefore, in addition to product performance requirements of high-strength, cold heading steel always try to reduce the content of silicon.
⑷ sulfur (S)
Sulfur are harmful impurities. The sulfur in steel causes cold heading separated from each other at the time caused the crack. The presence of sulfur has also prompted to produce hot brittle and rusted steel. Thus the sulfur content should be less than 0.06%. When heading high-strength fasteners, should be controlled within 0.04%. Since the compounds of sulfur, phosphorus and manganese can improve cutting performance, the sulfur content of cold heading steel nut can be raised to 0.08% -0.12%, to facilitate for tapping.
⑸ phosphorus (P)
Phosphorus to solution strengthening and work hardening is very good.Severe segregation in the steel, increasing cold brittleness and temper brittleness of steel,to let the steel erodible acid. phosphorus will worsen cold plastic deformation properties in the drawing manipulation wire breakage, cracking in cold heading workpiece manipulation. Phosphorus content of the steel should desirably be controlled 0.045% or less.
⑹The effect from other alloying elements chromium (Cr), molybdenum (Mo), nickel (Ni), vanadium (V), tungsten (W) and other alloying elements on the cold deformation properties of steel is lower than carbon. In general, increases in steel alloying elements, mechanical strength index steel hardenability increases, performance decreases cold deformation.

3, microstructure request
In order to better adapt to the cold steel forging process, for the distribution of steel structure and the size and form of non-metallic inclusions has certain requirements.
⑴ steel structure
In addition to the ferritic steels in vitro, as well as pearlite. The higher the carbon content, the more the number of pearlite. Soft ferrite matrix, in the soft matrix embedded with hard pearlite particles. Piles of pearlite distribution is disadvantageous for cold deformation, will be the formation of cracks. Organization of steel should be closely uniform, so. Cold heading steel use as uniformly distributed spherical grain structure.
⑵ grain size
Deformation of the metal is due to the deformation of crystal grains and grain itself slip occurs. Within a certain volume, the number of fine grains of metal grains more inevitable than coarse grains of metal, plastic deformation position when slip of the grain to the benefit is greater, distortion can be uniformly dispersed in each grain. Corresponding to the fine-grained metal deformation inhomogeneity and unevenness due to deformation caused by stress concentration are small, so the chance of cracking is also small, appear to increase the amount of plastic deformation can withstand before cracking, plastic is better reflects foreign . The smaller the grains, the grains produced by excitation of adjacent slip stress is smaller. For the deformation continues, the applied stress must be increased, reflecting a larger external deformation resistance. Therefore should not be used for cold heading steel too small grains. Grains too, will make the surface rough, resulting in significant scars and cracks. Coarse grained steel work hardening sensitivity than fine grain steels, and less plastic, cold deformation performance is poor. Cold heading steel grain size requirements for the 4-6 grade, grain size specification is as follows: the average grain diameter of about (0.02-0.06) mm; the number of grains per mm2 of about 250-2300 months; average grain an area of about (400-4000) μm2.
⑶ nonmetallic inclusions
Regardless of the method of smelting steel, there will always be more or less non-metallic inclusions. An oxide or sulfide inclusions, causes the crystal structure of the metal close intermittently. In the form of inclusions, the number and distribution of different properties of steel for cold deformation effects are different. Cold heading wire is a hot-rolled steel products for use after cold drawing, rolling and cold drawing process, these inclusions have been elongated along the direction of deformation. In general, fine, uniform distribution of inclusions little damage. Small and scattered sulfide inclusions can be better with the deformation direction deformation, thus representing a number of other inclusions smaller damage resulting deformation. Particularly harmful alumina inclusions. Alumina fine particles not only extremely hard, it will damage the mold; and hard to combine with the steel substrate, often tearing manipulation in severe cold deformation of the workpiece. Thick or thin and local concentration of inclusions, for cold heading steel properties influence.

4, the requirement of surface quality
Surface condition of the majority of ordinary hot-rolled steel is not good enough. Hot-rolled steel surface defects after cold drawing (if the compression ratio is too small) can not be eliminated, resulting in cold heading product surface defects and waste, will be unable to produce serious.
⑴ billet surface defects
Steel smelting, steel ingot leaving bubbles, shrinkage and other defects. After hot-rolled and cold drawn, the wire with a more serious penetrating longitudinal, upsetting significantly when exposed to the product surface. Defects folded ears, segregation, cracks and other raw materials in the rolling, cold heading will cause serious harm. Such as: bolts breakage, cracking nuts; workpiece while rubbing and thread, screw blanks crushed in half and so on. Improper handling of raw materials in pickling, the steel surface pitting, corrosion. If pitting, corrosion minor, after cold drawing, is elongated pits on the surface is basically not show signs of cold heading in Buzhi Yu therefore cracks. If the pits will form a serious gap; the gap is presented in more corners of the large deformation of the workpiece. Cracks and other surface defects deeper, cold deformation performance worse. Experiments show: Whether cold-drawn or cold heading, shape deformation degree for cracks little effect, but the impact is great crack depth. For larger deformation cold heading materials, critical depth of surface defects is 0.04-0.10mm, deeper defects must be avoided.
In the low-carbon steel is heated atmosphere will cause decarbonization. Although the quality of the products from the appearance of decarbonization not see anything, but any change in the carbon content of the surface have a significant effect on the mechanical properties of the workpiece. Especially on the carbon content of more than 0.30% of the steel, the surface of the workpiece decarbonization fatigue strength and wear resistance obviously harmful. Material in order to prevent decarburization annealing, the protective gas should be used.
Contrary to carburization and decarburization. High carbon steel in high temperature environments will produce carburizing. While the finished product is equivalent to the carburizing for hard shell is acceptable, sometimes need to adopt a method of producing the soft-core, but for the cold heading process is quite harmful. There carburizing steel surface layer as thin as eggshells hard. When the material restructuring or cold heading, the surface will produce cracks or peeling, reduce cold deformation properties of steel. Therefore, cold heading steel should completely avoid decarbonization and carburizing. Decarbonization and carburizing steel case can be microscope examination.
⑵ dimensional accuracy requirements
The dimensional accuracy of the wire for cold heading has a great influence on product quality and process. Cold heading wire and molds are usually processed separately specialization. If the wire diameter exceeds the maximum allowable value, when the upsetting piece of metal on the head too, will have adverse burrs or workpiece curving bar. Or because the wire diameter is larger than the diameter of the die hole leaving the die hard feed. And the stem portion of the workpiece to be brushed die hole, the hole in the mold to form a sharp metal tumors. If the wire diameter is less than the minimum allowable value, while not upsetting the metal mold cavity is completely filled, causing the workpiece edges unclear. So cold heading material to be sufficiently close to the true circle, uniform diameter. Cold heading wire diameter tolerance is generally 0.20-0.35mm, roundness tolerance of 1/2 of the diameter tolerance.

 Contact MetalHelper to Customize Metal cold heading Products

Submit drawings for Metal cold heading,Let Metalhelper manufacture it for you.

Let Metalhelper to help you process/manufacture Metal cold heading,Please send us the meassage with drawing or sample photo,and tell us your purchased quantity in first order,and then we`ll quote to you. The more details on product you provide,the more quick we can quote. You also can visit  http://www.metalhelper.com to contact Metalhelper company directly for Metal Extrusion Fabrication business

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metal cold heading

Metal Products Fabricate In China  >> Metal cold heading