某电厂Super304H钢锅炉高温再热器爆管分析  

Analysis of High Temperature Reheater Tube Burst of Super 304H Steel Boiler in a Power Plant

作　　者：冯红武 梅云平 田泽 叶建锋 FENG Hongwu;MEI Yunping;TIAN Ze;YE Jianfeng(Hubei Fangyuan Dongli Electric Power Science&Research Co.,Ltd.,Wuhan Hubei 430077,China;Electric Power Research Institute,State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430077,China)

机构地区：[1]湖北方源东力电力科学研究有限公司,湖北武汉430077 [2]国网湖北省电力有限公司电力科学研究院,湖北武汉430077

出　　处：《湖北电力》2021年第6期106-111,共6页Hubei Electric Power

摘　　要：针对某电厂高温再热器爆管失效,采用宏观检查、化学成分分析、硬度检测、金相检验、电镜分析以及能谱分析等试验,分析爆管原因,并提出改进措施。结果表明:高温再热器管组织老化严重是导致爆管的主要原因,同时爆口存在化学腐蚀,是导致开裂的重要原因,再热器管开裂方式为穿晶开裂。Aiming at the failure of high temperature reheater tube burst in a power plant,this paper analyzes the causes of tube burst by means of macroscopic examination,chemical composition analysis,hardness testing,metallographic examination,scanning electron microscope(SEM) analysis and energy disperse spectroscopy(EDS)analysis,and then puts forward the improvement measures. The result show that the aging of the reheater tube is the main cause of tube bursting. At the same time,there is chemical corrosion in the explosion mouth,which is an important cause of cracking. The cracking mode of reheater tube is transgranular cracking.

关 键 词：再热器 爆管 金相组织老化 化学腐蚀 穿晶开裂 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]