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用正交试验优选出Ｗ９Ｍｏ３Ｃｒ４Ｖ高速钢最佳激光回火工艺参数。研究表明：高速钢的激光淬火硬度和二次硬化峰显著高于常规淬火者，而激光回火的二次硬化值可以达到常规回火的二次硬化值
Optimum laser tempering process parameters of W9Mo3Cr4V high speed steel were optimized by orthogonal experiment. The results show that the laser quenching hardness and the secondary hardening peak of high speed steel are significantly higher than those of conventional quenching, while the secondary hardening value of laser tempering can reach the secondary hardening value of conventional tempering