汽轮机低压转子叶片断裂原因分析  

Fracture Analysis of Low-pressure Rotor for Steam Turbine

作　　者：牛玉静[1] 冯文吉 蒋成虎 马东方[1] 高秀娜[1] 

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450000 [2]国家电投技术信息中心,河南郑州450000

出　　处：《上海金属》2017年第1期65-69,共5页Shanghai Metals

摘　　要：通过现场调查、断口分析和理化检验,以及机组运行期间所检出叶片裂纹分布情况的研究,对某电厂汽轮机低压转子末级叶片的断裂原因进行了分析。结果表明,末级叶片硬质合金存在原始镶焊质量不良区域,在机组长期运行后形成了疲劳裂纹,最终导致叶片断裂。The fracture causes of last stage blades for low-pressure turbine rotor in a power plant were analyzed through the field survey, fracture analysis, physical ＆ chemical testings and research on the distribution of the detected blade crack during plant operation. The results showed that there was badly welded area between last stage blade and hard alloy, and that fatigue cracks were formed in the long run of the unit, which ultimately caused the blade fracture.

关 键 词：汽轮机 低压转子 末级叶片 断裂分析 

分 类 号：TK263.61[动力工程及工程热物理—动力机械及工程]