在熔融的硼酸盐中加入铬铁(熔融体中铬含量≥5％)。将要处理的零件浸入,在700°～1100℃下保持若干小时,可使零件表面获得所需要的铬扩散层。如零件为纯铁,形成的表面层为铁铬固溶体组织,如为钢的零件则生成以铬的碳化物为主的表面扩散层。此法的优点是:形成的表面层组织致密,有良好的耐腐 Ferrochromium is added to the molten ferrochromium (chromium content in the melt ≥ 5%). The part to be treated is immersed in and held at 700 ° to 1100 ° C for several hours to obtain the desired chromium diffusion layer on the part surface. Such as parts of pure iron, the formation of the surface layer of iron chromium solid solution, such as steel parts are generated to chromium carbide-based surface diffusion layer. The advantages of this method are: the surface layer formed by the formation of dense, good corrosion resistance