600MW超临界机组屏式过热器爆管失效分析  

Failure analysis on tube bursting of platen superheater of 600 MW ultra-supercritical power plant

作　　者：阎光宗[1] 徐雪霞[1] 欧阳杰[1] 柯浩[1] 

机构地区：[1]河北省电力研究院,河北石家庄050021

出　　处：《金属热处理》2011年第4期100-102,共3页Heat Treatment of Metals

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.

关 键 词：屏式过热器 失效分析 原始缺陷 

分 类 号：TG142.25[一般工业技术—材料科学与工程]