300MW汽轮机中压内缸螺栓断裂原因分析  

Failure Analysis on Intermediate Pressure Inner Cylinder of Steam-turbine for 300MW Power Plant

作　　者：梁红芳[1] 郑相锋 冀彦昭 郝晓军 康永胜 

机构地区：[1]河北省电力建设第一工程公司,石家庄054000 [2]国电锅炉压力容器检验中心,北京102209 [3]河北西柏坡发电有限责任公司,石家庄050400

出　　处：《河北电力技术》2016年第3期42-43,52,共3页Hebei Electric Power

摘　　要：针对某电厂300 MW汽轮机中压内缸高温螺栓断裂情况,采用宏观分析、化学分析、力学分析、金相分析、电镜分析等方法进行断裂原因分析,认为螺栓服役时间过长造成材质脆性增加是螺栓在运行中发生断裂的主要原因,并提出相应的建议。Aiming at intermediate pressure inner cylinder of steam-turbine for 300 MW power plant through microscope analysis,mechanical analysis,chemical analysis,metallography examination and scanning electron microscope etc,the causes resulting in fracture of high temperature bolt in intermediate pressure inner cylinder of steam-turbine for 300 MW power plant are analyzed.The result indicates the internal cause was the brittleness of high temperature bolt increasing with service time and broke in the operation.

关 键 词：300 MW汽轮机 高温螺栓 20Cr1Mo1VTi B 断裂 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程] TK264.9