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随着高效、高速、高能量、大吨位的机械化、自动化锻压设备的发展以及冷挤、冷镦、冷冲等少无切削加工工艺的广泛应用,对模具的强度、韧性和耐磨性,提出了更高的要求。目前采用的钨基高速钢(Wi8Cr4V)、钨钼基高速钢(W6Mo5Cr4V2)、高铬钢(Cr12MoV)和热作模具钢(3Cr2W8V)等,已不能满足上述对模具性能的要求。因而,改善和提高模具钢的强韧性,延长模具使用寿命,就越来越重要和紧迫。
With the high efficiency, high speed, high energy, large tonnage of mechanization, the development of automatic forging equipment and cold extrusion, cold heading, cold punching and other less cutting technology widely used, the strength of the mold, toughness and wear resistance, put forward A higher requirement. The currently used tungsten-based high-speed steel (Wi8Cr4V), tungsten and molybdenum-based high-speed steel (W6Mo5Cr4V2), high-chromium steel (Cr12MoV) and hot work die steel (3Cr2W8V), can not meet the above requirements of the mold performance. Therefore, to improve and enhance the toughness of die steel, to extend the life of the mold, more and more important and urgent.