660MW超临界机组锅炉低温过热器爆管分析  

Tube Burst Analysis for Low-temperature Superheater of a 660 MW Supercritical Power Boiler

作　　者：谢逍原 刘盛波 张学星 

机构地区：[1]东方锅炉(集团)股份有限公司,自贡643001

出　　处：《发电设备》2011年第2期112-114,120,共4页Power Equipment

摘　　要：对某电厂660 MW超临界机组锅炉投产运行3 000 h后所发生的低温过热器水平管组国产12Cr1MoVG钢管爆管事故进行了分析。根据断口金相组织判断,爆管原因为管子起源于内壁的、产生于制管过程中的原始纵向裂纹缺陷,在运行过程中扩展至最后断裂。An analysis has been performed to burst failures occurring in horizontal 12Cr1MoVG tube banks of a 660 MW supercritical power boiler＇s superheater after 3 000 h operation.From the metallographic structure of the fracture surface,the failure was found to be caused by a longitudinal crack on inner surface of the tube,which was originally produced during tube manufacture,then propagated during operation,and finally led to the fracture failure.

关 键 词：超临界压力锅炉 低温过热器 爆管 裂纹 

分 类 号：TK223.32[动力工程及工程热物理—动力机械及工程]