【作者】 唐久安；

【导师】 孙文山；

【作者基本信息】 哈尔滨理工大学 ， 材料学， 2002， 硕士

【摘要】 本文采用以渗铬、碳为主的深层多元复合渗的化学热处理工艺，同时考虑利用国产富有的稀土元素以及含有钨、钼、镍、钴和锰等多种元素的复合渗剂，通过膏剂涂覆再经高温共渗、扩渗和回火的复合热处理进行。 探讨了共渗、扩渗、回火工艺与渗层金相组织、渗层深度、硬度、耐磨性、耐蚀性和耐腐蚀磨损性能之间的关系。经显微组织观察和X射线衍射技术分析，在共渗过程中渗层表面先形成Cr₂₃C₆碳化物，随共渗时间的延长和碳含量的提高，渗层表面出现Cr₇C₃。ZG1Cr18Ni9经1150℃×8h共渗后由表及里的组织为：A+（Cr．M）₇C₃→A+（Cr．M）₇C₃+（Cr．M）₂₃C₆→A+（Cr．M）₂₃C₆→A。 经1150℃×8h共渗、1150℃×2h扩渗、再施以不同温度（250℃×1h、450℃×1h、520℃×4h）回火处理，ZG1Cr18Ni9钢的渗层深度、硬度和耐磨性均可满足甚至超过技术指标要求。立足于国内资源，圆满解决了奥氏体不锈钢表面硬化日本专利技术的破译和取代工作。更多还原

【Abstract】 In this paper, we have used chemical heat treatment of deep multicomponent complex diffusion, mainly chromizing and carburizing to improve ZGlCrl8Ni9 austenite stainless steel, and considered to use rare earth element which is rich in our own country and the complex diffusive reagents which contains W, Mo, Ni, Co and Mn, etc. At last we have carried out the complex heat treatment by paste smearing and coating, general diffusion at high temperature, spreading diffusion and tempering.We have discussed the correlation of technology of general diffusion, spreading diffusion and tempering with the metal phase, depth, hardness, wear resistance, corrosion resistance and corrosion-wear resistance of the diffusive layer. By observation of micro-structure and analysis of X-ray diffraction, in the process of general diffusion, at first, we can get Cr23C6 on the surface of the diffusive layer, and as the increase of time carbon content, we can get Cr7C3-. After general diffusing for 1150℃x 8h, from surface to interior, the structure of the complex diffused layer on the ZGlCrl8Ni9 substrate isA + (Cr.M)7C3 -->A + (Cr.M)7C3 + (Cr.M)23C6 -->A+(Cr.M)23C6 -->A.After general diffusion for 1150℃ X 8h, spreading diffusion for 1150℃ X 2h, then tempering at different temperature (250℃X In, 450℃x lh, 520℃x 4h), all of the depth of diffusive layer, hardness and wear resistance of ZGlCrl8Ni9 steel can reach or even exceed the demand of the technological index. On the base of the resources of our own country, we have successfully resolved the work to expose and replace the Japanese patent technology of the hardening on the Austenite stainless steel surface更多还原