304不锈钢法兰失效分析  

Failure Analysis on Flange of 304 Stainless Steel

作　　者：陈鹏[1] 尤兆宏 白涛[1] 关凯书[1] 

机构地区：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237 [2]上海赛科石化股份有限责任公司,上海201507

出　　处：《热加工工艺》2013年第2期196-198,共3页Hot Working Technology

摘　　要：通过宏观检查,化学成分分析,金相和扫描电镜分析,断口能谱分析以及晶间腐蚀试验分析,对某甲烷出口管线的法兰产生的裂纹进行了分析。结果表明:不锈钢晶间有碳化物析出,晶粒粗大,发生沿晶开裂,晶间腐蚀比较敏感,在沿海大气中Cl-的作用下产生了应力腐蚀开裂。The failure reason of flange used in the methane outlet pipeline was analyed by macro-analysis, chemical composition analysis, metallographic and scanning electron microscopy analysis, the fracture energy dispersive spectrometry and intergranular corrosion analysis. The results show that the stainless steel intercrystalline has carbide precipitation and intergranular cracking, the grains are coarse, and the intergranular corrosion is sensitive, the CI- in the coastal atmosphere results in stress corrosion cracking.

关 键 词：法兰 失效分析 应力腐蚀 

分 类 号：TG172.9[金属学及工艺—金属表面处理]