1.问题的提出芜湖仪表厂生产的汽车仪表零件大部分是冲制成形,模具需要量很大,其中约25%为拉伸模具。这部分模具多用Cr12钢制作,以往采用常温淬火,使用寿命很低,78年使用渗硼工艺后,寿命有所提高,取得了一定的效果。但由于硼层存在易崩落、变形大、抗烧伤性差、 1. The question raised Wuhu Instrument Factory car parts manufactured mostly punch forming, mold needs a large amount, of which about 25% of the stretch mold. This part of the mold more Cr12 steel production, the use of room temperature quenching, the service life is very low, 78 years after using boronizing process, the life expectancy has been improved, and achieved certain results. However, due to the presence of boron collapse easily, deformation, anti-burn worse,