以提高耐磨性等为目的,使金属表面硬化的各种方法大致分类如图1所示。利用钢的马氏体转变来硬化的表面淬火法对于钢铁材料早已广泛应用,而对于有色金属材料这一方法,一般是不适用的。生成合金层的方法是利用在表面形成与基体不同的合金层以达到硬化的方法。其中扩渗法是利用原子尺寸小的C、N、B等在高温下从金属表面渗入,与基体中的元素形成固溶 To improve the wear resistance for the purpose of the metal surface hardening various methods roughly classified as shown in Figure 1. The surface hardening method that hardens by the martensitic transformation of steel has been widely used for the steel material, and is generally not suitable for the method of the non-ferrous metal material. The method of forming the alloy layer utilizes a method of forming a different alloy layer on the surface to achieve hardening. In which the infiltration method is the use of small atomic size C, N, B, etc. infiltrated from the metal surface at high temperatures, and the matrix elements form a solid solution