高速钢的激光热处理,采用熔融处理后,硬度不高,一般仍需后续常规淬、回火处理;而采用相变硬化技术,处理后可获得HV1000以上的超高硬度,从而免除了后续的淬火工艺,并使高速钢的抗咬合性、耐磨性显著提高,但硬化机理尚不清楚。本文用电镜、X射线衍射方法,研究了W6Mo5Cr4V2高速钢激光处理获得超高硬度的机理,以便为生产应用提供理论依据。 High-speed steel laser heat treatment, the use of melting treatment, the hardness is not high, the general still need to follow-up conventional quenching and tempering; and the use of phase-change hardening technology, treatment can be obtained after HV1000 ultra-high hardness, eliminating the need for subsequent quenching Technology, and anti-seizure high-speed steel, wear resistance significantly improved, but the hardening mechanism is not clear. In this paper, by electron microscopy, X-ray diffraction method, the W6Mo5Cr4V2 high-speed steel laser treatment to obtain ultra-high hardness mechanism in order to provide a theoretical basis for the production and application.