综述了 齿轮激光淬火加工理论及方法的研究进展, 分析了 淬火硬化层形成机理以及与 传统齿轮淬火硬化层形成机理的差异。 通过对激光淬火加工的扫描方式、偏置量、扫描速度、入射角 以及辅助冷却方式等工艺的分析, 提出 了 相应的优化方案。 对激光淬火和常规淬火后齿面的 硬度、耐磨性、变形量、金相组织以及晶粒形状和分布进行了 分析, 认为齿轮激光淬火比常规淬火具备更优的机械性能。

This article summarized the research progress on the theories of laser quenching, and meanwhile analyzed the formation mechanism of hardening layer, as well as its difference from the formation mechanism of the traditional gear quenching methods. Through the analysis of scanning way, offset, scanning speed, angle of incidence and auxiliary cooling technology in the process of laser quenching, corresponding optimization schemes were put forward. By comparing the hardness of tooth surface, wear resistance, deformation, the microstructure and grain shape and distribution of the gears treated by laser quenching and normal quenching, it was concluded that the gear product of laser quenching had better mechanical performance than those prepared by the conventional quenching.