了解：304不锈钢焊管应力腐蚀开裂原因

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　　许万剑

　　杨春丽 　　赵宏柱 　　陶新秀 　　丁非 　　陈安源 　　某公司不锈钢焊管使用过程中出现大面积开裂泄露。采用宏观检验、化学成分分析、金相检验、SEM、EDS能谱分析等方法，对该管道的开裂泄露进行失效分析。结果表明，该焊管的开裂主要为氯离子应力腐蚀开裂。焊管成型后未热处理造成的残余应力、管外面橡塑保温材料释放出的氯离子共同造成了该不锈钢焊管的应力腐蚀开裂。不锈钢管厂家https://www.35bxg.com浙江德圣钢业有限公司是专业不锈钢卫生管，不锈钢精轧管厂家。专注高品质食品级无缝钢管，卫生级焊接钢管制造，国内最专业的不锈钢卫生管专家！0578-8938361！ 　　不锈钢焊接钢管 　　残余应力 　　橡塑保温材料 　　应力腐蚀 　　welded stainless steel pipe 　　residual stress 　　rubber insulation material 　　stress corrosion 　　Large area of cracks and leakage were found on some welded stainless steel pipes. The pipes were analyzed by means of macroscopic examination, chemical composition analysis, metallographic examination, SEM and EDS. The results showed that the crack was stress corrosion cracking caused by chloride ion. The stress corrosion was due to the combined effects of residual stress which was caused by no heat-treatmnet after cold-working and chloride ion which came from rubber insulation material. 　　TG174 　　应用技术 　　2013/7/24 　　点击查看 　　许万剑(xuwanjian2008@126.com) 　　许万剑(1987-),工程师,硕士,从事不锈钢制品质量检验, 　　XU Wan-jian,YANG Chun-li,ZHAO Hong-zhu,TAO Xin-xiu,DING Fei,CHEN An-yuan. Analysis on Stress Corrosion Cracking of Welded Stainless Steel Pipe[J]. Corrosion & Protection, 2014, 35(5): 511 　　邹章雄,金少申,刘昌禄,刘顺勤,马强,葛玉雄, "奥氏体不锈钢压力管道的应力腐蚀开裂及预防",理化检验－物理分册 51, 721-724(2015)

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