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在大批量生产条件下,高速钢,特别是 P6M5钢广泛地被用于制造冷镦模具。在这些情况下使用高速钢证明有效的,模具在高单位压力(22MPa)下工作,如冷镦中碳钢和低碳钢(35,40X,38等等)。这是由于在淬火和多次高温回火之后,在高速钢结构中实际上没有残余奥氏体晶粒,其接触强度明显减弱。使用8×4B2C2M(761),6×4M2ФC(55)型低合金弥散性硬化钢不能获得 P6M5钢水平的复合性能,因为761
High-speed steels, especially P6M5 steels, are widely used in the manufacture of cold heading dies under high-volume production conditions. Using HSS in these conditions proved effective, the tooling operates at high unit pressures (22 MPa) such as cold heading medium and low carbon steels (35, 40X, 38, etc.). This is due to the fact that after quenching and high temperature tempering, there is virtually no residual austenite grains in the HSS and the contact strength is significantly reduced. The use of 8 × 4B2C2M (761), 6 × 4M2ФC (55) low alloy dispersion hardenable steel can not get P6M5 steel composite properties, because the 761