摘要
分析了某公司生产的水轮机转轮叶片开裂的原因。通过现场考察,热蚀实验,力学性能测试,金相分析,扫描电镜观测,发现叶片的断裂是疲劳断裂。补焊不当,铸造缺陷及较高的残余应力是造成断裂的主要原因。
An analysis on the causes of runner blade fractures for hydroturbines manufactured by a company was made with methods of field observation, hot erosion experiment, mechanical property testing, and OM and SEM photography. The results show that the blade failure was caused by fatigue fracture resulted from improper welding, casting defects and high residual stress.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第6期278-282,共5页
Journal of Hydroelectric Engineering
关键词
水力机械
材料失效与保护
失效分析
金相
水轮机叶片
hydraulic machinery
materials failure and protection
failure analysis
metallographic phase
hydroturbine runner blades
