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What are the materials used to make stamping molds?

by:Fortuna     2021-03-06
The materials used to manufacture stamping parts molds include high-speed steel, carbon tool steel, alloy tool steel, cemented carbide, steel-bonded cemented carbide, zinc-based alloys, low melting point alloys, aluminum bronze, polymer materials, etc.; currently manufacturing stamping parts molds Most of the materials are mainly steel; 1. The carbon tool steels used in stamping parts are T8A, T10A, etc. The carbon tool steels are characterized by good processing performance and low price; but hardenability and redness The hardness is poor, the heat treatment deformation is large, and the load-bearing capacity is low; 2. Low-alloy steel low-alloy tool steel is based on carbon tool steel with a proper amount of alloying elements added. Compared with carbon tool steel, it reduces quenching deformation and cracking tendency, improves the hardenability of steel, and has better wear resistance. Low-alloy steels used to make stamping die have CrWMn, 9Mn2V, 7CrSiMnMoV (code CH-1), 6CrNiSiMnMoV (code GD) and so on. 3. High carbon and high chromium tool steel commonly used high carbon and high chromium tool steels are Cr12 and Cr12MoV, Cr12Mo1V1 (code D2), they have good hardenability, hardenability and wear resistance, heat treatment deformation is small, high Wear-resistant micro-deformation die steel, the bearing capacity is second only to high-speed steel. However, the segregation of carbides is serious, and repeated upsetting (axial upsetting, radial upsetting) and modified forging must be carried out to reduce the unevenness of carbides and improve the performance. 4. High-carbon medium-chromium tool steels. High-carbon medium-chromium tool steels used for stamping parts die include Cr4W2MoV, Cr6WV, Cr5MoV, etc. They have low chromium content, less eutectic carbides, uniform carbide distribution, and small heat treatment deformation. , Has good hardenability and dimensional stability. Compared with high carbon and high chromium steel with relatively serious carbide segregation, the performance is improved. 5. High-speed steel High-speed steel has the highest hardness, wear resistance and compressive strength among die steels, and has a high load-bearing capacity. Commonly used in stamping molds are W18Cr4V (code 8-4-1) and W6Mo5Cr4V2 (code 6-5-4-2, Japanese brand SKH51, American brand M2) with less tungsten content, as well as those developed to improve toughness Low carbon and vanadium high speed steel 6W6Mo5Cr4V (code 6W6 or low carbon M2). 6. Basic steel Add a small amount of other elements to the basic composition of high-speed steel, and appropriately increase or decrease the carbon content to improve the performance of the steel. Such steel types are collectively referred to as base steel. They not only have the characteristics of high-speed steel, have certain wear resistance and hardness, but also have better fatigue strength and toughness than high-speed steel. They are high-strength and toughness cold-worked die steels, and the material cost is lower than that of high-speed steel. The commonly used base steels in stamping molds are 6Cr4W3Mo2VNb (code 65Nb), 7Cr7Mo2V2Si (code LD), 5Cr4Mo3SiMnVAl (code 012AL) u200bu200band so on. 7. The hardness and wear resistance of cemented carbide and steel-bonded cemented carbide are higher than any other types of die steel, but the bending strength and toughness are poor. The cemented carbide used as the mold is tungsten-cobalt. For molds with low impact resistance and high wear resistance, cemented carbide with lower cobalt content can be selected. For molds with high impact, cemented carbide with higher cobalt content can be used. Steel-bonded cemented carbide is made by adding a small amount of alloying element powder (such as chromium, molybdenum, tungsten, vanadium, etc.) to iron powder as a binder, using titanium carbide or tungsten carbide as the hard phase, and sintering by powder metallurgy. The base of steel-bonded cemented carbide is steel, which overcomes the disadvantages of poor toughness and difficult processing of cemented carbide. It can be cut, welded, forged and heat treated. Steel-bonded cemented carbide contains a large amount of carbides. Although the hardness and wear resistance are lower than that of cemented carbide, it is still higher than other steel types. The hardness can reach 68-73HRC after quenching and tempering. Recommended article: The development direction of metal stamping parts dies Previous: Stamping parts processing plant tells about the concept of stamping dies
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