大型汽轮机隔板静叶焊缝裂纹的原因分析及处理措施  

Causes Analysis and Disposal on Cracks in Clapboard Fillet Weld of Large Scale Steam Turbine LP Cylinders

作　　者：赵纪峰[1] 李中伟[1] 张东文[1] 张广兴[1] 孙涛[1] 李青松[1] 

机构地区：[1]河北省电力研究院,石家庄050021

出　　处：《河北电力技术》2009年第5期34-34,47,共2页Hebei Electric Power

摘　　要：针对660MW汽轮机低压缸末级、次末级焊接隔板静叶角焊缝裂纹情况,从铸件时效应力,焊缝内原始缺陷等方面进行了原因分析,并介绍了包括裂纹挖除、补焊、焊后检查的补焊处理工艺。This paper analyzes the cracks in the stationary blades fillet weld on diaphragm of 660 MW steam turbine low pressure cylinder from the aspect of casting ageing-stress and original weld defects,etc.,and adopts appropriate repaired welding process,which is proved to be successful in practice.

关 键 词：汽轮机 隔板静叶 焊缝 结构应力 残余应力 

分 类 号：TG441[金属学及工艺—焊接]