何耀宇，杨吉春，张文怀，李堃，刘香军
（内蒙古科技大学 材料与冶金学院，内蒙古 包头，014010）
关键词：12Cr18Ni9奥氏体不锈钢；增氮降镍；晶间腐蚀
中文分类号：TG142. 71 文献标志码: A
摘要：本实验在12Cr18Ni9奥氏体不锈钢的基础上进行增氮降镍，采用不锈钢硫酸—硫酸铜腐蚀试验法对不同氮含量的试验钢种进行晶间腐蚀试验，分析试验钢的金相组织形貌以及晶间腐蚀
沟的深度，结果表明，试验钢的晶间腐蚀程度随着氮含量的提高显著降低。
AThe Study on Intergranular corrosion of 12Cr18Ni9 Austenitic Stainless Steel with Increasing Nitrogen and Reducing Nickel
He Yao-yu, Yang Ji-chun, Zhang Wen-huai, Li Kun，Liu Xiang-jun
(School of Materials and Metallurgy，Inner Mongolia University of Science and Technology，Baotou 014010，China)
Key words: 12Cr18Ni9 austenitic stainless steel; Reduced nickel and increased nitrogen; Intergranular corrosion
Abstract: The experiment of increasing nitrogen and reducing nickel on the basis of 12Cr18Ni9 austenitic stainless steel was carried out by means of copper sulfate su
lfuric acid test for stainless steels, and the experiment of intergranular corrosion on the test steel with different grade of nitrogen was conducted, so as to analyz
e the metallographic tissue topography of the test steel and the degree of depth of intergranular corrosion ditch. Result shows that the intergranular corrosion degr
ee of the test steel was reduced significantly with the raising of the nitrogen content.