摘要
以加入镧的低镍铬锰氮不锈钢为研究对象,通过显微组织观察,分析了镧对低镍铬锰氮不锈钢显微组织的影响;采用交流阻抗和极化曲线分析技术,对实验钢在模拟海水环境下的电化学行为进行了研究。结果表明,当镧含量在0-0.0049%范围,镧对低镍铬锰氮不锈钢的显微组织有细化作用并能减少孪晶;在模拟海水腐蚀环境下,低镍铬锰氮不锈钢的耐蚀性不随镧含量的增加而一直增加,当镧的含量为0.0049%时试样的蚀性最好,当镧的含量达到0.014%时耐蚀性下降。
Low-nickel Cr-Mn-N stainless steel containing rare earth La was the research object in this study. The effect of rare earth La on the microstructure of the stainless steel was researched through microscope. The electrochemical behavior of the stainless steel in the simulated seawater environment was studied by electrochemical impedance spectrum and polarization curve. The results show that the microstructure of low-nickel Cr-Mn-N stainless steel can be refined and the amount of twin crystal can be decreased when the content of La was in the range of 0 - 0. 0049%. The corrosion resistance of low-nickel Cr-Mn-N stainless steel was not always enhanced with increase of content of rare earth La in the simulated seawater environment. When the content of rare earth La was 0. 0049%,the corrosion resistance of the sample was the best. When the content of rare earth La was 0. 014%,the corrosion resistance was declined.
出处
《稀土》
EI
CAS
CSCD
北大核心
2014年第3期36-39,共4页
Chinese Rare Earths
基金
内蒙古自治区高等学校科学研究项目资助(92021)
包头市科技计划项目资助(93079)
关键词
镧
低镍铬锰氮不锈钢
显微组织
耐蚀性
rare earth La
low-nickel Cr-Mn-N stainless steel
microstructure
corrosion resistance
