激光是目前能量密度最高的热源,而且具有很好的方向性、单色性和相干性,利用这些特性,对金属或零件表面进行优化处理(包括激光相变硬化、激光“上光”、激光合金化和激光涂敷等)可以改变金属或零件表面的微观结构,从而改善其力学和理化性质,就机械行业而言,主要是改善零部件的抗磨损、耐腐蚀和抗疲劳性质。 Laser is currently the most energy-intensive heat source, and has good directivity, monochromaticity and coherence. Using these characteristics, the surface of metal or parts are optimized (including laser phase hardening, laser “glazing”, laser Alloying and laser coating, etc.) can change the microstructure of the metal or part surface to improve their mechanical and physico-chemical properties. In the mechanical industry, the main aim is to improve the wear, corrosion and fatigue resistance of parts.