316L不锈钢波纹管补偿器失效分析  

Failure Analysis of 316L Stainless Steel Bellows Compensator

作　　者：夏标 姜勇[1,2] 巩建鸣 XIA Biao;JIANG Yong;GONG Jianming(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China;Key Lab of Design and Manufacture of Extreme Pressure Equipment,Nanjing 211816,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816 [2]极端承压装备设计与制造重点实验室,江苏南京211816

出　　处：《热加工工艺》2021年第16期155-158,共4页Hot Working Technology

摘　　要：采用扫描电镜、能谱分析仪、直读光谱仪、金相显微镜等,对316L材质波纹管补偿器在一定温度、工作应力、介质相互作用下的泄漏原因进行了研究。结果表明:波纹管在服役过程中,组织发生了敏化,并在应力最大处发生了沿晶开裂,从波纹管与工作介质接触的外表面开裂,裂纹向内发展,逐层贯穿,最终导致波纹管补偿器泄漏。The scanning electron microscope,energy spectrum analyzer,direct reading spectrometer and metalloscope were used to study,the leakage causes of 316 L bellows compensator under the interaction of temperature,working stress and medium were studied.The results show that,during service the microstructure of bellows is sensitized and intergranular cracking occurs at the maximum stress position.From the outside surface of the bellows contact with the working medium,the crack occurs and is develops inward and penetrates layer by layer,which finally leads to the leakage of the bellows compensator.

关 键 词：316L不锈钢 波纹管 敏化 应力腐蚀开裂 Cl- 

分 类 号：TG111.91[金属学及工艺—物理冶金]