AISI304奥氏体不锈钢高温快速氮化组织与耐腐蚀性能的研究  

Research on Microstructure and Corrosion Resistance Properties of AISI304 Austenitic Stainless Steel Produced by High Temperature Fast Nitriding

作　　者：李杨[1,2] 何永勇[1] 邱剑勋[2] 王伟[1] 赵军[1] LI Yang HE Yongyong QIU Jianxun WANG Wei ZHAO Jun(State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China Department of Materials Science and Engineering, Yantai University, Yantai 264005, China)

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084 [2]烟台大学环境与材料工程学院,山东烟台264005

出　　处：《热加工工艺》2017年第20期53-55,共3页Hot Working Technology

基　　金：国家重点基础研究发展规划项目(2014CB046404);国家自然科学基金(51301149);中国博士后基金(2015M570090)

摘　　要：为避免铬氮化物的析出,离子渗氮一般在低温(<450℃)下来制备S相层。本文在高温下快速氮化获得氮的膨胀奥氏体S相层。AISI304奥氏体不锈钢在高温(530℃)下渗氮处理0~5 h。采用X射线衍射仪、扫描电镜和显微硬度仪等表征氮化样品。采用阳极极化试验研究氮化前后样品在3.5%Na Cl溶液中的腐蚀性能。结果表明:高温快速氮化处理不仅提高奥氏体不锈钢的表面硬度,而且提升了耐蚀性。In order to avoid the precipitation of CrN,S phase layer was prepared at low temperature （〈450℃ ） during plasma nitriding. In the paper, nitrogen expanded austenite S phase layer could be obtained by fast nitriding at high temperature in short time. AISI 304 austenitic stainless steel was nitrided at high temperatures （530℃） for 0-5 h.The nitrided sample was characterized by X-ray diffraction, scanning electron microscopy and microhardness tester. The corrosion properties of the samples before and after nitrided were evaluated using anodic polarization tests in 3.5%NaCl solution. The results show that high temperature fast nitriding can not only increase the surface hardness of austenitic stainless steel, but also improve the corrosion resistance.

关 键 词：离子氮化 奥氏体不锈钢 电化学腐蚀 

分 类 号：TG113.2[金属学及工艺—物理冶金]