简单介绍了激光相变硬化的特点、硬化机理、材料强化机理以及冷作模具、热作模具和塑料模具的表面处理要求,给出了常见的模具钢种以及经常使用激光相变硬化处理的钢种的一般工艺参数。 The characteristics of laser phase-change hardening, hardening mechanism, material strengthening mechanism and the surface treatment requirements of cold die, hot die and plastic mold are briefly introduced. The common mold steel and the steel which is often treated by laser phase transformation hardening are given The kind of general process parameters.