某电厂汽轮机叶片损伤分析

Damage analysis of steam turbine blades in a power plant

某电厂汽轮机多组叶片发生损伤或断裂,文中通过断口宏观分析、化学成分材质分析、金相组织分析、扫描电镜分析(SEM)、力学性能分析等,对其损伤原因进行全方位研究。研究表明,第13级断裂动叶片断裂为疲劳断裂;第15级隔板集水槽脱落物脱落原因不明。

Several sets of blades of a steam turbine in a power plant are damaged or broken.In this paper,through fracture macroscopic analysis,chemical composition analysis,metallographic analysis,scanning electron microscopy(SEM)and mechanical property analysis,a full range of research on the causes of damage is carried out.Research shown that the fracture of the moving blade of the 13 th stage is a fatigue fracture;the reason for the falling off of the 15 th stage baffle sump is unknown.