锅炉顶棚过热器管开裂原因分析  

Failure Analysis on the Fracture of Tubes for Roof Superheater in a Boiler

作　　者：张亚明[1] 姜胜利[1] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016

出　　处：《中国材料科技与设备》2014年第4期84-86,共3页Chinese Materials Science Technology & Equipment

摘　　要：对某热电厂3号锅炉的无损探伤检查，发现该炉部分顶棚过热器管的背火面上存在裂纹。通过对过热器管的裂纹形貌、化学成分、金相组织和断口等的分析，确认3号锅炉顶棚过热器管的开裂失效性质属于热疲劳破坏。Cracks were found on the side unexposed to fire of tubes for roof superheater in no. 3 boiler of a thermal power plant during NDT inspection. Pipe crack morphology, chemical composition, microstructure and fracture analysis are per- formed, confirming that the cause for no. 3 boiler roof superheater tube cracking failure is thermal fatigue damage.

关 键 词：锅炉 顶棚过热器管 开裂 热疲劳 

分 类 号：TK223.32[动力工程及工程热物理—动力机械及工程]