汽轮机调速器轴断裂失效分析
Failure Analysis on Governor Shaft Fracture of Steam Turbine
马小明，李靖
点击：2652次 下载：0次
作者单位：华南理工大学
中文关键字：调速器轴； 断裂； 失效分析
英文关键字：governor shaft; brittle fracture; failure analysis
中文摘要：摘要：作者采用化学成分分析、扫描电镜、金相分析，强度计算等方法对汽轮机调速器轴失效原因进行了综合分析。结果表明，调速器轴发生了脆性开裂，轴材料冶金缺陷，轴键槽棱边应力集中及键槽发生磨损是导致开裂失效的主要原因。最后作者提出了相应的对策措施，以防止类似事故的重复发生。
英文摘要：Abstract: Based on chemical composition analysis ,SEM, metallography, strength analysis and other analytical methods,the fracture causes of the governor shaft was investigated.The results showed that the fracture was brittle fracture.Metallurgical imperfection,key slot edgestress concentration and abrasion are the key factors. Finally, countermeasures have been tentatively put forward to prevent the repeated failure.