General requirements for the selection of stamping die materials
The materials for the stamping die are steel, hard alloy, steel-bonded hard alloy, zinc-based alloy, low-melting alloy, aluminum bronze, polymer material, and the like. At present, most of the materials used in the manufacture of stamping dies are mainly steel. The types of commonly used mold working parts are: carbon tool steel, low alloy tool steel, high carbon high chromium or medium chrome tool steel, medium carbon alloy steel, high speed. Steel, base steel and hard alloy, steel bonded carbide and so on.
Carbon tool steel
The carbon tool steel used in the mold is T8A, T10A, etc. The advantages are good processing performance and low price. However, the hardenability and the red hardness are poor, the heat treatment deformation is large, and the bearing capacity is low.
2. Low alloy tool steel
Low-alloy tool steel is based on carbon tool steel with the right amount of alloying elements. Compared with the carbon tool steel, the quenching deformation and cracking tendency are reduced, the hardenability of the steel is improved, and the wear resistance is also good. The low alloy steel used for the production of the mold includes CrWMn, 9Mn2V, 7CrSiMnMoV (code CH-1), 6CrNiSiMnMoV (code GD) and the like.
3. High carbon high chromium tool steel
Commonly used high-carbon high-chromium tool steels are Cr12 and Cr12MoV, Cr12Mo1V1 (code D2), which have good hardenability, hardenability and wear resistance, and have small heat treatment deformation, which is a high wear-resistant micro-deformed die steel. The ability is second only to high speed steel. However, the segregation of carbides is serious, and it is necessary to carry out repeated plucking (axial enthalpy, radial drawing) to forge to reduce the non-uniformity of carbides and improve the performance.
4. High carbon medium chromium tool steel
High-carbon medium-chromium tool steels for molds include Cr4W2MoV, Cr6WV, Cr5MoV, etc., which have low chromium content, less eutectic carbides, uniform carbide distribution, small heat treatment deformation, good hardenability and dimensional stability. Sex. Performance is improved compared to high carbon high chromium steels where carbide segregation is relatively severe.
