摘要
通过对导流管工况条件、破裂宏观特征、断口微观形貌及断口腐蚀产物的综合分析 ,认为该导流管属腐蚀疲劳破坏 ,引起腐蚀疲劳的交变应力来自高温高速蒸汽冲击时产生的振动 ,断口上有腐蚀性元素 ,裂纹扩展区断口呈双重锯齿状 。
A systematical analysis on service environment,macro- and microscopic morphologies of failure surfaces and corrosion products on failure surfaces showed that the failure of a diversion tube inside a bellows was resulted from corrosion fatigue.The fatigue cyclic stresses came from the vibration due to the impact of high-speed steam.Aggressive elements were found on failure surfaces,and the morphologies of failure surfaces in crack propagation region were double sawtooth,which further confirmed the above conclusion.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2003年第5期299-301,共3页
Corrosion Science and Protection Technology
关键词
波纹管
导流管
破裂
腐蚀疲劳
失效分析
不锈钢
failure analysis
1Cr18Ni9Ti stainless steel
diversion pipe
corrosion fatigue
