【摘要】 采用透射电镜和Ｘ射线衍射技术研究了奥氏体不锈钢碳铬共渗层的组织结构。结果表明：在碳铬共渗过程中，先在渗层中形成Ｃｒ＿（２３）Ｃ＿６型碳化物，它与母相奥氏体（Ａ）之间具有的取向关系。进一步提高表面碳含量可生成Ｃｒ＿７Ｃ＿３型碳化物。表面碳含量越高，所生成的Ｃｒ＿７Ｃ＿３碳化物越多，而Ｃｒ＿（２３）Ｃ＿６型碳化物则减少。碳铬共渗层由表及里的最终组织为：Ａ＋Ｃｒ＿７Ｃ＿３→Ａ＋Ｃｒ＿７Ｃ＿３＋Ｃｒ＿（２３）Ｃ＿６→Ａ＋Ｃｒ＿（２３）Ｃ＿６更多还原

【Abstract】 This paper deals with the structure of carbochromized austenite stainless steels by TEM and X-ray diffraction techniques. It is indicated Cr₂₃C₆ carbides are formed during carbochromozing first and it has a orientation relationship with the matrix of austenite（A）, that isAs the further increase of carbon content in the case,the Cr₇C₃ carbide then presents. Thehigher the carbon content is,the more the carbide Cr₇C₃ presents,but the Cr₂₃ C₆ carbide decreases.The final structure of carbochromized ZGlCrl8Ni9 steel from surfaceto core is更多还原