摘要
某LNG应急调峰站在运行一段时间后,部分弯头在焊接接头处外表面发现裂纹。通过对管件进行化学成分分析、硬度测定、金相分析、断口SEM和腐蚀产物分析等,查明了失效原因。结果表明,由于化学成分及固溶处理质量不合格,导致在使用过程中发生应力腐蚀开裂。
After a period of operation of a LNG emergency peak shaving station,cracks were found on the outer surface of part elbow’s welded joints.By means of chemical composition analysis,hardness determination,metallographic analysis,fracture SEM and corrosion product analysis,etc.,the failure cause was found out.The results show that,the stress corrosion cracking occurs in the process of application because of the unqualified chemical composition and solution treatment quality.
作者
潘鸿
周鹏飞
钱英豪
许万剑
PAN Hong;ZHOU Pengfei;QIAN Yinghao;XU Wanjian(Branch of Suzhou,Jiangsu Province Special Equipment Safety Supervision Inspection Institute,Suzhou 215128,China;National Stainless Steel Products Quality Supervision and Inspection Center,Taizhou 225400,China)
出处
《热加工工艺》
北大核心
2019年第24期174-177,共4页
Hot Working Technology
关键词
应力腐蚀
失效分析
裂纹
固溶处理
stress corrosion
failure analysis
crack
solution treatment
作者简介
潘鸿(1961-),男,江苏苏州人,高级工程师,学士,主要从事压力容器及管道检验研究工作,电话:13771912069,E-mail:1500298836@qq.com
