摘要
采用恒载荷试验法及慢应变速率试验法（ＳＳＲＴ）研究了渗铝３０４奥氏体不锈钢在沸腾４２％ＭｇＣｌ２溶液中的应力腐蚀开裂（ＳＣＣ）性能，分析了渗铝不锈钢应力腐蚀开裂机理，讨论了不同试验方法对渗铝不锈钢应力腐蚀开裂敏感性评价的影响．结果发现：１）各渗铝不锈钢在沸腾４２％ＭｇＣｌ２溶液中的ＳＣＣ敏感性评价、恒载荷试验的临界应力与ＳＳＲＴ的最大延伸率具有较好的一致性；２）渗铝不锈钢采用ＳＳＲＴ（ε＝３．０４×１０－６ｓ－１）的断口分析不能判断其ＳＣＣ敏感性及ＳＣＣ机理；３）渗铝不锈钢抗应力腐蚀开裂性能依赖于渗层变形能力．
? By means of constant load tests and slow strain rate tests,the stress corrosion cracking(SCC) behavior of aluminized 304 stainless steel in boiling 42% MgCl_2 solution was studied.The SCC mechanism of aluminized 304 stainless steel has been analysed.The influence of different tests means on the evaluation of SCC susceptibility of aluminized 304 stainless steel is discussed.The results show that:1) The appraisal on SCC susceptibility of aluminized 304 stainless steel and greatest specific elongation have quite good concordance.2) Nicked fracture analysis of aluminized stainless steel when adopt SSRT(=3.04×10-6s-1) can not decide the mechanism of SCC susceptibility and stress corrosion disruption.3) The nature of stress corrosion disruption of aluminized stainless steel is dependent on the ability of percolation layer transformation.
出处
《郑州轻工业学院学报》
1998年第1期54-57,共4页
Journal of Zhengzhou Institute of Light Industry（Natural Science）
关键词
不锈钢
应力腐蚀
断口
金相
渗铝
stainless steels
stress corrosion cracking
fractography
aluminized
