贯流式水轮机联轴螺栓断裂失效分析  

Failure Analysis of Coupling Bolt of Tubular Turbine

作　　者：黄桥生 周乐 龙毅 杨湘伟 牟申周 万克洋 

机构地区：[1]湖南省湘电锅炉压力容器检验中心有限公司,湖南长沙410007 [2]凌津滩水电厂,湖南常德415700

出　　处：《水力发电》2013年第1期59-62,共4页Water Power

摘　　要：某水电厂水轮机联轴螺栓在运行中发生断裂,通过应力计算、显微金相、扫描电镜、力学性能等试验对其进行分析。结果表明,螺栓为非正常的网状铁素体组织,致使螺栓冲击功明显降低,以及Mn、S等夹杂物的存在,使得基体局部应力集中而产生裂纹源是螺栓断裂的主要原因。A coupling boh of turbine in a hydroelectric power plant is fractured during operation. The thilure is analyzed by stress calculation and the experiments of metallurgical microscopy, scanning electron microscupe and mechanical properties. The results show that the state of bolt is a non-normal network ferrite which will create obvious decrease in bolt impact energy, and there are inclusions of Mn and S in bolt body which will create local stress concentration. These defects are main causes of boh fracture.

关 键 词：水轮机 螺栓 断裂 应力 原因分析 

分 类 号：TV547.3[水利工程—水利水电工程]