理化检验-物理分册2017，Vol.53Issue(3)：197-200,4.DOI:10.11973/lhjy-wl201703011
火电厂汽轮机叶片开裂原因分析
Analysis on Fracture Reasons of Turbine Blades in a Heat-power Plant
黎华 1卢忠铭 1刘课秀 1王恋1
作者信息
- 1. 广州特种承压设备检测研究院, 广州 510663
- 折叠
摘要
Abstract
The last stage moving blades of a generators turbine in a heat-power plant were found cracking on extrados at the end of the steam admission side during maintenance downtime.The cracking reasons of the turbine blades were analyzed by macroscopic observation, chemical composition analysis, hardness testing, metallographic examination, fracture scanning and energy spectrum analysis.The results show that: the origin of the cracks was located in the water-eroded pits on the extrados surface of steam admission side of the last stage turbine blades;the intergranular stress corrosion cracking was caused by tensile stress of moving blades and the working environment of chloride ion corrosion.关键词
汽轮机叶片/开裂/氯离子/应力腐蚀开裂Key words
turbine blade/cracking/chloride ion/stress corrosion cracking分类
矿业与冶金引用本文复制引用
黎华,卢忠铭,刘课秀,王恋..火电厂汽轮机叶片开裂原因分析[J].理化检验-物理分册,2017,53(3):197-200,4.
