摘要
用断口宏观形貌、化学成分分析、常温力学性能检验、显微组织观察和扫描电镜断口分析法,对某电厂奥氏体不锈钢屏式过热器管爆管泄漏的原因进行分析。结果表明,爆管泄漏的屏式过热器管内壁存在原始缺陷,在机组运行中,该缺陷扩展最终导致爆管。
By use of the analysis of fracture appearance,chemical composition of the austenite stainless steel tube,microstructure metallography observation,mechanical properties examination and SEM fracture analysis,the reason of tube bursting of the platen superheater used in power plant was analyzed.The results show that the crack initiates from the original defect on the inner wall of the leaking tube,and during the generating set running the cracking propagates step by step,and leads to the tube bursting finally.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第4期100-102,共3页
Heat Treatment of Metals
关键词
屏式过热器
失效分析
原始缺陷
platen superheater
failure analysis
original defect
