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模具是一种重要的工艺装备。模具使用性能的好坏,寿命的高低,直接影响某些企业产品的质量、更新换代的速度和技术经济效益,影响产品的竞争能力。因此,各国都在不断地研究模具新材料、强韧化热处理新工艺和表面强化技术,以缩短模具制造周期,提高模具制造质量,延长模具使用寿命。在热模具方面,国外三十年代开始用3Cr2W8、5CrNiMo等钢。五十年代发展起了低钨系、5铬系和3铬-3钼系钢。六十年代提出了性能介于高速钢和热模具钢之间的基体钢,但应用并不广泛。目前,为适应难加工材料成形及特殊性能要求的模具材料
Mold is an important process equipment. Mold performance is good or bad, the level of life, a direct impact on the quality of some enterprises, the rate of replacement and technical and economic benefits, affecting the competitiveness of products. Therefore, all countries are constantly studying new materials mold, toughening heat treatment of new technology and surface hardening technology to shorten the mold manufacturing cycle, improve the quality of mold manufacturing, mold life extension. In the hot mold, the foreign thirties began with 3Cr2W8, 5CrNiMo and other steel. In the fifties developed a low tungsten, 5 chromium and 3 chromium-3 molybdenum steel. Sixties put forward the performance of intermediate steel between high-speed steel and hot die steel, but not widely used. At present, to meet the difficult to shape the material and the special performance requirements of the mold material