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一、前言高速钢高温预热淬火在重庆工具厂纳入产品生产工艺以来,经过了八年的生产实践,证明该工艺在提高产品质量、缩短生产周期、节约能源方面起到了良好的作用。高速钢刀具原来的工艺是经过三只盐浴炉预热,其温度都是820～840℃,然后进入高温盐炉加热。还规定大于或等于模数5的滚刀、铣刀、以及剃齿刀、节径≥100的插齿刀等增加一道500℃的箱式电炉预热,保温2小时。该预热过程算是够完善了,可是一些大型
I. INTRODUCTION After the high-speed steel preheating and quenching high-temperature steel has been incorporated into the production process of the tool plant in Chongqing, after eight years of production practice, it proves that the process played a good role in improving product quality, shortening the production cycle and saving energy. High-speed steel cutting tool is the original process after three salt bath preheating, the temperature is 820 ~ 840 ℃, and then into the high temperature salt furnace heating. Also provided greater than or equal to 5 hobs, milling cutters, shaving knives, shaper knives with a pitch diameter ≥100, etc. Preheating a 500 ° C box electric furnace for 2 hours. The preheating process is perfect, but some large