不锈钢波纹管膨胀节开裂原因  

Cracking reason of stainless steel bellows expansion joint

作　　者：李家兴 成雷 白学刚 康昊源 LI Jiaxing;CHENG Lei;BAI Xuegang;KANG Haoyuan(China Special Equipment Inspection&Research Institute,Beijing 100029,China;Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment for State Market Regulation,Beijing 100029,China)

机构地区：[1]中国特种设备检测研究院,北京100029 [2]国家市场监管技术创新中心(炼油与化工装备风险防控),北京100029

出　　处：《理化检验（物理分册）》2023年第6期19-21,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家重点研发计划资助项目(2021YFC3001805)。

摘　　要：某石化公司不锈钢波纹管膨胀节发生开裂,采用宏观观察、化学成分分析、金相检验、能谱分析等方法研究其开裂原因。结果表明:波纹管膨胀节长期处于氯化物水溶液环境中,在波纹管加工时产生的残余应力以及工作中产生的应力作用下,不锈钢波纹管膨胀节发生氯化物应力腐蚀开裂。The stainless steel bellows expansion joint of a petrochemical company cracked.The cracking reason was studied by means of macroscopic observation,chemical composition analysis,metallographic examination and energy spectrum analysis.The results showed that the bellows expansion joint was in the environment of chloride aqueous solution for a long time.Under the residual stress generated during the processing of the bellows and the stress generated during the work,the chloride stress corrosion cracking of the stainless steel bellows expansion joint occured.

关 键 词：不锈钢 波纹管膨胀节 应力腐蚀开裂 

分 类 号：TG115.2[金属学及工艺—物理冶金] TB31[金属学及工艺—金属学]