电站锅炉过热器管爆管原因分析  

Analysis on Causes of Tube Burst in Superheater of An Utility Boiler

作　　者：刘献良 赖云亭[1] 马芹征 LIU Xianliang;LAI Yunting;MA Qinzheng(Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou 215004,China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《热加工工艺》2021年第6期158-160,共3页Hot Working Technology

摘　　要：针对某电站锅炉过热器管在运行时出现爆管的问题,分别采用宏观检验、化学成分分析、力学性能测试和金相检验等手段进行了全面分析与讨论。结果表明:长时超温运行是造成爆管的主要原因。另外,弯头未经固溶处理或固溶处理不充分,以及内壁氧化皮的大面积脱落也加速了管子的开裂。In view of the problem of tube burst in operation of superheater tube of an utility boiler, macroscopical inspection, chemical composition analysis, mechanical property test and metallographic test were used to analyze and discuss the cavses comprehensively. The results show that, long time overtemperature operation is the main cause of tube burst. In addition, the crack of the tube is accelerated by the elbow uncomplete or without solid solution treatment and the large area exfoliation of the inner wall oxidized skin.

关 键 词：爆管 SUPER304H 固溶处理 超温运行 

分 类 号：TG111.91[金属学及工艺—物理冶金]