“汽缸激光热处理”即用高能激光束作为热处理热源扫过汽缸壁表面,使材料瞬间加热到相变温度,而后靠材料自身的热传递急速冷却,表面得到超细化的马氏体淬火组织,表面硬度由原来的洛氏20℃提高到60℃,并得到0.2mm～0.5mm的淬火深度。由 “Cylinder laser heat treatment” that is, using high-energy laser beam as the heat treatment heat source swept across the cylinder wall surface, the material instantly heated to the phase transition temperature, and then rapidly cooled by the material’s own heat transfer, the surface was ultra-fine martensite quenched tissue, Surface hardness from the original Rockwell 20 ℃ to 60 ℃, and get 0.2mm ~ 0.5mm quenching depth. by