冷作模具的选材问题关系到寿命、效率和冲压件质量。我国当前使用的高性能冷作模材料,除高铬钢之外,还有硬质合金及高速钢。这三类材料的性能大体如表1所示。硬质合金(包括钢结硬质合金)的高抗压、高耐磨性,使其在许多场合下寿命比普通模具钢大大地提高。但是由于强韧性及可加工性不良,使应用范围受 Selection of cold-working die related to the life, efficiency and quality of stamping parts. China currently used high-performance cold molding materials, in addition to high-chromium steel, there are carbide and high-speed steel. The performance of these three types of materials generally shown in Table 1. Carbide (including steel hard alloy) high compression, high wear resistance, so that in many cases life expectancy than the ordinary mold steel greatly increased. However, due to poor toughness and machinability, the range of applications subject