摘要
本文采用慢拉伸状态下的腐蚀试验方法测定304H不锈钢在NaOH及Cl^-作用下的应力腐蚀倾向、主要影响因素及应力腐蚀基础数据。同时对比pH11及pH13两组应力腐蚀裂纹扩展实验,分析304H不锈钢在含Cl^-高温碱性溶液中的主导失效模式。试验结果表明304H不锈钢在含Cl^-高温碱性环境中主导失效模式需根据两种介质实际浓度而定:其中在pH13、100℃、1%Cl^-介质中,304H的应力腐蚀为碱脆主导的应力腐蚀开裂,同时其KISCC的数值约为22.4~25.9MPa·m^1/2,裂纹平均扩展速率约为1.16×10^-6 mm/s^1.54×10^-6mm/s。
In this paper, the stress corrosion tendency, main influencing factors and basic data of stress corrosion of 304 H stainless steel under the action of NaOH and Cl^-are measured by corrosion test method under slow tensile condition. Meanwhile, the stress corrosion crack propagation experiments of pH11 and pH13 were compared to analyze the dominant failure mode of 304 H stainless steel in solution containing Cl^-high temperature and alkaline solution. The test results show that the dominant failure mode of 304 H stainless steel in Cl^-containing high-temperature and alkaline environment needs to be determined according to the actual concentration of the two media: in the 1% Cl^- containing medium at pH13, 100℃, stress corrosion at 304 H is stress corrosion cracking dominated by alkali brittlement, and the KISCC value is about 22.4~ 25.9 Mpa·m^1/2, and the average crack growth rate is about 1.16×10^-6 mm/s^1.54×10^-6 mm/s.
作者
张福林
张肖飞
卓小文
郑乾坤
饶思贤
Zhang Fulin;Zhang Xiaofei;Zhuo Xiaowen;Zheng Qiankun;Rao Sixian(School of mechanical engineering,anhui university of technology,Anhui Maanshan 243032;Hefei general machinery research institute national pressure vessel and pipeline safety engineering technology center,Anhui Hefei 230031;Sany heavy machinery co.LTD,JiangSu Kunshan 215300)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第S01期599-603,共5页
Heat Treatment of Metals
基金
十二五支撑计划子课题(2011BAK06B02)
安徽省教育厅重大自然科学研究项目(KJ2016SD09)
安徽省科技厅自然科学基金项目(1908085ME148).
关键词
304H不锈钢
含Cl^-高温碱性环境
主导失效模式
应力腐蚀开裂
304H stainless steel
High temperature alkaline environment containing Cl^-
Dominant failure mode
Stress corrosion cracking
