600WM汽轮发电机组汽封弹簧片断裂原因分析  

Fracture Failure Analysis on Steam-sealing Spring of 600 WM Steam Turbine Generator

作　　者：孙澎[1] 冯砚厅[1] 孙涛[1] 柯浩[1] 

机构地区：[1]国网河北省电力公司电力科学研究院,河北石家庄050000

出　　处：《铸造技术》2015年第3期669-671,共3页Foundry Technology

摘　　要：通过化学成分分析、金相组织观察、显微硬度测试和扫描电镜断口形貌观察,对某发电公司600 WM汽轮发电机组汽封弹簧片断裂失效原因进行了分析。结果表明,该弹簧片的断裂是由于不当的热处理工艺,使磷元素偏聚于晶界,极大地提高了材料的脆性,最终导致弹簧片脆性断裂。The fracture failure reasons of steam-sealing spring used in 600 WM steam turbine generators were studied by chemical analysis, microstructure, microhardness and fracture morphology. The results show that the main reason for the fracture is segregation of phosphorus which result from unsuitable heat treatment.

关 键 词：弹簧片 GH 2136 热处理 脆性断裂 失效 

分 类 号：TM311[电气工程—电机] TG115[金属学及工艺—物理冶金]