主要介绍热处理的原理(钢在_1、_2、 This paper mainly introduces the principle of heat treatment (steel heating, heat preservation,_3时的组织转变)、热处理的工艺(_4 Microstructure transformation during cooling, heat treatment process (annealing,_5、_6、_7、表面热处理等)及常用材 Normalizing, quenching, tempering, suce heat treatment, etc.) and common materials 料的典型热处理工艺。Typical heat treatment process of the material.