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本文推荐了高速钢热处理新工艺——在淬火过程中回火。这个方法规定:1.工具加热到标准淬火温度;2.工具冷却到50～120℃,即低于马氏体开始转变的温度M_H点。这时,马氏体转变的体积的变化比冷却到20℃的普通方法约小五分之三;3.在50～120℃保持1～3分钟后,加热到600℃(对于P6M5φ3钢)和630℃(对于P9M4K8钢)并保持10～30分钟;4.空冷到室温。
This article recommends a new high-speed steel heat treatment process - tempering in the quenching process. This method provides: 1. The tool is heated to the standard quenching temperature; 2. The tool is cooled to 50-120 ° C, which is lower than the temperature at which the martensite begins to change. At this time, the volume of the martensitic transformation changes about three-fifths less than the ordinary method of cooling to 20 ° C; 3. After heating at 50 ° C for 1 to 3 minutes at 600C (for P6M5φ3 steel) and 630 ℃ (for P9M4K8 steel) and maintain 10 to 30 minutes; 4 air cooled to room temperature.