集箱管接座角焊缝缺陷浅析及返修处理

摘要

The pipe connection seat fillet welds defect of superheater outlet collector existing seriously affected the normal safety operatioa The paper used FT method and found that the welding crack of the pipe connection seat was caused by the expansion from root incomplete fusion to surface. Root incomplete fusion was due to aligning small gaps of groove before welding and not adoping argon arc welding bottom. This paper presented the detailed repair measures.%屏式过热器出口集箱管接座角焊缝缺陷的存在严重影响锅炉正常安全运行.通过渗透检测,发现集箱管接座的焊接裂纹是由根部未熔合扩展到表面引起的.根部未熔合的产生是由于焊接前对口时坡口间隙过小以及焊接时未采用氩弧焊封底.提出了具体的返修处理方案.