激光热处理具有无公害、节约能源、变形小、操作简单、硬层深度可控和易于实现自动化等优点;为七十年代的最新热处理技术之一。湖南省激光热处理协作组采用激光进行活塞环表面硬化的试验研究,取得了良好的效果。处理后铸铁活塞环可得到0.1～0.2毫米深度的淬硬层,硬度为HV797～1032,耐磨性好,与镀硬铬相当, Laser heat treatment has the advantages of pollution-free, energy saving, small deformation, simple operation, hard depth controllable and easy to automate. It is one of the latest heat treatment technologies in the seventies. Hunan Laser Heat Treatment Cooperative Group using laser piston ring surface hardening experimental study and achieved good results. After treatment, the cast iron piston ring can obtain a hardened layer with a depth of 0.1-0.2 mm and a hardness of HV797-1032, which has good abrasion resistance and is comparable with hard chrome plating,