采用窄间隙钨极氩弧焊(Narrow-gap tungsten inert gas,NG-TIG)和窄间隙埋弧焊(Narrow-gap submerged arc welding,NG-SAW)组合焊......

为充分发挥不同材料在不同运行条件下的优势,采用埋弧焊（SAW）堆焊过渡层,采用窄间隙钨极氩弧焊（NG-TIG）和窄间隙埋弧焊（NG-SAW）组合焊接......