超临界机组主蒸汽阀门缺陷焊接修复  

Welding Repair of Suppercritical Unit Main Steam Valve Defects

作　　者：鲁立[1] 于程炜 王淦刚[1] 赵建仓[1] 成鹏[1] 贺桂林[2] 王宝臣 梁军 

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004 [2]天津国华盘山发电有限责任公司,天津301900 [3]神华国华(北京)电力研究院有限公司,北京100088

出　　处：《华北电力技术》2012年第10期55-57,67,共4页North China Electric Power

摘　　要：介绍了超临界机组主蒸汽阀门阀体穿透裂纹缺陷的处理及焊接修复过程,分析了裂纹的产生原因及材料焊接性,并据此制定了焊接修复工艺。焊后检测表明采用该焊接修复工艺,可以获得无损检测、硬度金相合格的补焊焊缝,同时采用的锤击及热处理工艺可以较好的控制焊接残余应力。This paper introduced the processing of through crack defects on the supercritical unit main steam valve body and welding repair process,analyzed the causes of cracks and material weldability,and then developed a weld- ing repair process. The detection after welding showed that using this welding repair process can be obtained non-de- structive testing,hardness metallographic qualified repair welding seam,while the use of the hammer and heat treat- ment process can better control the welding residual stress.

关 键 词：主蒸汽阀门 铸钢件 裂纹 补焊 

分 类 号：TK263.63[动力工程及工程热物理—动力机械及工程]