本文根据高温预热淬火工艺:780°—863°—1000℃预热—淬火加热—分级冷却等几个过程,对高速钢刀具进行了多种性能试验,其结果证明:该工艺具有加热时间短,硬度高、均匀性好、工件变形小、晶粒细、红硬性高的效果。使用该工艺可以提高劳动生产率25～33％,减少刀具氧化脱碳保证内在质量,适用于大批量高速钢刀具的淬火。 According to the process of high temperature preheating and quenching: 780 ° -863 ° -1000 ℃ preheating-quenching heating-grading cooling, a series of performance tests have been carried out on high speed steel cutting tools. The results show that the process has short heating time , High hardness, good uniformity, small deformation of the workpiece, fine grain, high red hardness effect. The use of the process can increase labor productivity 25 ~ 33%, reduce the tool to ensure the inherent quality of oxidation and decarburization, suitable for high-speed quenching of high-speed steel cutting tools.