摘要
对某热力管网使用5年后开裂破损的316 L不锈钢波纹管进行了宏观形貌、金相组织、断口形貌及腐蚀产物的分析同时分析了波纹管开裂的原因.结果表明,波纹管开裂属应力腐蚀;造成应力腐蚀的介质是波纹管所处环境中(井室水中)的氯化物;应力来自波纹管的工作应力和加工应力.并提出了相应的防范措施.
The failure analysis of 316 L stainless steel bellows that being used in a heating pipeline for 5 years has been conducted by using optical microscope and scanning electron microscope （SEM）. The re- sults showed that the cracking of the bellows was caused by stress corrosion cracking. The cracking was induced by the chlorides in water. The working stress may play a dominant role and the residual stress due to cold working were also responsible for the cracking. Finally several prevention measures was proposed.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2007年第4期304-306,共3页
Corrosion Science and Protection Technology
关键词
热力管网
316
L不锈钢
波纹管
应力腐蚀开裂
heating pipeline
316 L stainless steel
bellows
stress corrosion cracking
