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介绍了锅炉胆封头的焊接特点、难点、焊接方法及焊接中容易产生质量缺陷的处理及预防措施。锅炉炉胆封头焊接采用单面焊接双面成形的方法,要求背面成形良好,焊接工艺对成形具有决定性作用。双面成形的关键是背面成形控制,其中焊缝外形、咬边、焊瘤、弧坑、气孔、裂裂、夹渣、未焊透等缺陷采用单面焊接双面成形的方法进行控制。解决了锅炉炉胆封头焊接的技术难题,延长了锅炉的使用寿命。
The welding characteristics, difficulties, welding methods and the easy handling and precautionary measures of quality defects in the boiler head are introduced. The boiler furnace head welding using single-sided welding double-sided forming method requires the back of a good shape, the welding process has a decisive role in shaping. The key to double-sided forming is the back forming control, in which the defects of weld shape, undercut, welding knob, crater, air hole, crack, slag inclusion and incomplete penetration are controlled by single-sided welding double-sided forming method. Solve the technical problems of the boiler furnace head seal welding, extending the life of the boiler.