摘要
通过电化学试验的方法,研究了低温气体渗碳(LTGC)处理对形变304L不锈钢抗点蚀性能的影响。结果表明:经过45%预应变后,304L不锈钢中产生了约62%(体积分数)的α′-马氏体(形变诱导马氏体),在含Br-的溶液中抗点蚀性能大幅降低;经低温气体渗碳处理后,304L不锈钢表面α′-马氏体基本消失,大量碳原子固溶形成了膨胀奥氏体相,提高形变304L不锈钢的抗点蚀性能。
The effect of low temperature gaseous carburization(LTGC)on pitting corrosion resistance of deformed 304Lstainless steel was studied by electrochemical testing.The results show that 62%(volume fraction)α′-martensite(martensite induced by deformation)was found in 304L stainless steel after pre-strain of 45%,and the pitting corrosion resistance in solution containing Br-decreased.After LTGC treatment,the α′-martensite in the surface of 304L stainless steel disappeared and was transformed into expanded austenite by solid solution of a large number of carbon atoms in it,which improved the pitting corrosion resistance of deformed 304L stainless steel.
作者
姜勇
李洋
周阳
巩建鸣
JIANG Yong;LI Yang;ZHOU Yang;GONG Jianming(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China;Key Lab of Design and Manufacture of Extreme Pressure Equipment,Nanjing 211816,China)
出处
《腐蚀与防护》
CAS
北大核心
2019年第2期87-91,共5页
Corrosion & Protection
基金
国家自然科学基金资助项目(51475224)
江苏省高校自然科学研究重大项目(14KJA470002)
江苏省普通高校研究生创新计划资助项目(KYZZ16_0234)
关键词
低温气体渗碳(LTGC)
膨胀奥氏体
形变诱导马氏体
点蚀
low temperature gaseous carburization(LTGC)
expanded austenite
martensite induced by deformation
pitting corrosion
