一、前言激光微精处理是采用激光扫描的方法在机械零件表面制成一人造的微凸体或微凹体表面形貌的图案。其微凸体的形成是由于激光这种高密度能量束对金属作用使其金属组织产生相变（如，产生淬火马氏体）其体积膨胀而形成的微凸；而微凹体是由于激光能量密度较高或由于金属材 First, the preamble Laser micro-processing is the use of laser scanning method in the mechanical parts made of a man-made surface asperities or microgrooves topography patterns. The formation of asperities is due to laser high-density energy beam effect on the metal to produce a phase change of its metal structure (such as the generation of quenched martensite) its volume expansion and the formation of micro-convex; and micro-concave body is due to the laser Higher energy density or due to metal material