粉末冶金机械零件的几何精度和尺寸公差,一般都是以成形压模和整形压模来保证的,共生产成本亦与模具的制造费用和耗损率有一定关系。因此,模具材料的正确选择是工具设计时必须很好考虑的一个问题。笔者想根据多年来工作的心得,谈谈个人对这方面的看法。在一般粉末冶金生产过程中,成形压力和整形压力在2.0～6.0吨/平方厘米(29700～83600磅/平 Powder metallurgy machinery parts geometric accuracy and dimensional tolerances are generally based on the molding die and plastic mold to ensure that the total cost of production and mold manufacturing costs and wear rate has a certain relationship. Therefore, the correct choice of mold materials is a tool that must be well considered when designing a problem. I want to talk about personal opinions on this subject based on the work experience over the years. In the general powder metallurgy production process, forming pressure and shaping pressure of 2.0 ~ 6.0 tons / square centimeter (29700 ~ 83,600 pounds / square