根据回火参数公式并通过实验制定了W9Mo3Cr4V高速钢机用锯条高温（HH）两次回火和高、低温（HL）两次回火工艺。分析了不同回火工艺对该高速钢组织性能和锯条切削寿命的影响。指出提高回火温度使残余奥氏体转变成的马氏体的碳含量降低，从而使钢的韧性提高，锯条寿命提高。结果表明高温两次回火节能显著，操作简单，值得推广应用。 According to the tempering parameter formula and through the experiment developed W9Mo3Cr4V high speed steel machine saw blade high temperature (HH) twice tempering and high and low temperature (HL) twice tempering process. The effect of different tempering process on the microstructure and cutting life of the HSS was analyzed. It is pointed out that increasing the tempering temperature decreases the carbon content of the martensite transformed into retained austenite, thereby increasing the toughness of the steel and increasing the life of the saw blade. The results show that high temperature twice tempering energy saving is significant, simple operation, it is worth promoting application.