高温再热蒸汽管道水压堵阀阀体裂纹的补焊

Repair welding on body crack on water pressure blocking valves used for high temperature reheat steam pipelines

分析了高温再热管道水压堵阀阀体表面裂纹原因,制定了裂纹消除和焊接工艺措施。根据缺陷深度,采用镍基材料低温冷补焊和同质热补焊的两种补焊工艺方法,收到良好效果。

Analyses causes of cracks on the surface of the body of blocking valves for high temperature reheat steam pipelines,establishes measures for removing cracks and welding technology.Based on the depth of defects,two repair welding technology methods can be adopted：Nickel base material cold welding at low temperature,and Homogeneous hot repair welding,and good effect is achieved.