0Cr22Mn18MoNbN钢固溶态组织及抗腐蚀性能毕业论文.docx

长春工业大学学士学位论文 毕业论文 题 目：0Cr22Mn18MoNbN钢固溶态组织及抗腐蚀性能 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT I 摘 要 高氮无镍奥氏体不锈钢是一种以氮代镍获得稳定奥氏体组织的新钢种，它不但可以提高不锈钢的综合性能、节约镍资源、而且可以解决含镍较高的不锈钢用于人体时造成的镍过敏问题，在生物医学领域应用潜力巨大。本试验通过光学显微镜、SEM观测了试验钢的显微组织，其基体为奥氏体组织，并残余少量第二相；通过XRD分析固溶态0Cr22Mn18MoNbN钢的相结构，得知残余的第二相为氮化物，固溶处理后组织趋向完全奥氏体化；通过和铸态0Cr22Mn18MoNbN的耐腐蚀性测试的对比试验结果表明，在3.5%NaCL溶液室温的盐水腐蚀试验中耐蚀性能明显优于铸态0Cr22Mn18MoNbN。 关键词：0Cr22Mn18MoNbN钢；奥氏体；XRD；耐腐蚀性；  Abstract High nitrogen nickel free austenitic stainless steel is a new kind of steel whichabtains its stabilized austenite structure by replace nickel with nitrogen. This material is a fully stainless steel with not only high combination property, saving nickelresource but also solves the anaphylactic problem that caused by high nickel-bearing stainless steel used for human body, so this material has a very promising application in bio-medical field.Inthis experiment, the microstructure of the test steel wasobserved by optical microscope, the microstructure of the test steel was observed, and the matrix was austenite and the second phase was retained by SEM;The phase structure of the solid solution 0Cr22Mn18MoNbN steel was analyzed by XRD, and the second phase was found to be the nitride, and the microstructure of the solid solution treatment after the solid solution treatment was completely changed;The corrosion resistance of the 0Cr22Mn18MoNbN solution was significantly better than that of the as cast 0Cr22Mn18MoNbN. in the corrosion resistance of the 3.5%NaCL solution at room temperature by comparing the results of the test with the corrosion resistance of the as cast. Key words: 0Cr22Mn18MoNbN steel;Austenite;XRD;Corrosion resistance;  目录 TOC \o 1-3 \h \u HYPERLINK \l _Toc18120 摘 要 PAGEREF _Toc18120 I HYPERLINK \l _Toc18442 Abstract PAGEREF _Toc18442 II HYPERLINK \l _Toc7286 第一章绪论 PAGEREF _Toc7286 1 HYPERLINK \l _Toc24626 引言： PAGEREF _Toc24626 1 HYPERLINK \l _Toc22323 1.1高氮钢概述： PAGEREF _Toc22323 1 HYPERLINK \l _Toc12230 1.1.1 高氮钢的定义：