General requirements for stamping die material choice

Manufacturing stamping die steel, hard alloy, with the material of steel bonded carbide, zinc base alloy, low melting point alloy, aluminum bronze, polymer materials, and so on. Now for the most part manufacturing stamping mold material is given priority to with steel, the types of commonly used mold working parts material: low carbon tool steel, alloy tool steel, high carbon high chromium or chromium in tool steel, medium carbon alloy steel, high speed steel, matrix steel and carbide, steel bonded carbide, etc. 1. Carbon tool steel for carbon tool steel T8A in mould is widely applied and T10A advantages for processing performance is good, price is cheap. But hardenability and red hardness, heat treatment deformation, bearing capacity is low. 2. Low alloy tool steel low alloy tool steel is on the basis of the carbon tool steel added just the right amount of alloy element. Compared with the carbon tool steel, reducing the quenching distortion and cracking tendency, improves the hardenability of steel, wearability is also better. Low alloy steel in the manufacture of moulds are CrWMn, 9 mn2v, 7 crsimnmov ( Code CH - 1) 、6CrNiSiMnMoV( Code GD) And so on. 3. High carbon high chromium steel used of high carbon high chromium tool steels are Cr12 and Cr12MoV, Cr12Mo1V1 ( Code D2) , they have good hardenability, quenching hardness and wear resistance, heat treatment deformation is small, high wear-resisting micro deformation die steel, bearing capacity after high speed steel. But serious carbide segregation, must be repeated heading (pull The axial upsetting, radial) Change of forging, to reduce the inhomogeneity of carbide, improve operational performance. 4. Of high carbon chromium steel used in the mould of high carbon chromium steel Cr4W2MoV, Cr6WV, Cr5MoV, such as their low chromium content, less eutectic carbide, carbide uniform distribution, the heat treatment deformation, has good hardenability and dimensional stability. And the carbide segregation is relatively serious, compared to high carbon high chromium steel performance improved. 5. Among the highest in the high speed steel high speed steel with steel hardness, abrasion resistance and compressive strength, high bearing capacity. That is commonly used in die W18Cr4V ( Number 8 - 4 - 1) And tungsten content less W6Mo5 Cr4V2 ( Number 6 - 5 - 4 - 2, the American brand for M2) And to improve the toughness and development of carbon vanadium high speed steel reduction 6 w6mo5 Cr4V ( Code 6 w6 or low carbon M2) 。 High speed steel is also need to change forging to improve the carbide distribution. 6. On the basic elements of high speed steel substrate steel adding small amounts of other elements, appropriately increase or decrease of carbon content, in order to improve the performance of the steel. The steel grade generally referred to as the substrate steel. Not only has the characteristic of high speed steel, they have a certain wear resistance and hardness, and fatigue strength and toughness are better than that of high speed steel, cold work die steel for high strength toughness, high speed steel material costs are lower. Is commonly used in the mold of the substrate steel has 6 cr4w3mo2vnb ( Code 65 nb) 、7Cr7Mo2V2Si（ Code LD) 、5Cr4Mo3SiMnVAL（ Code 012 al) And so on. 7. Hard alloy and steel bonded carbide carbide hardness and wear resistance is higher than any other types of steel, but the bending strength and toughness is poor. Used for mould cobalt tungsten carbide is class, the impact is small and require high wear resistance of the mold, can choose a lower cobalt content of carbide. The impact of mold, can choose containing a high percentage of cobalt cemented carbide. Steel bonded carbide is iron powder to join a small amount of alloy element powder ( Such as chromium, molybdenum, tungsten, vanadium, etc. ) Do adhesive, with titanium carbide and tungsten carbide hard phase, with the method of powder metallurgy sintering. Steel bonded carbide substrate is steel, overcome the carbide toughness is poorer, the shortcomings of processing difficulty, can be cutting, welding, forging and heat treatment. Steel bonded carbide containing a large amount of carbide, although the hardness and wear resistance is lower than hard alloy, but still higher than that of other steel, after quenching and tempering hardness can reach 68-73 HRC.