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在焊接过程中,常常由于焊工技术不熟练或因工作疏忽大意等,致使焊接接头出现各种不允许存在的缺陷,如成形不良,气孔、夹渣,未焊透等。为了消除这些缺陷使焊件达到技术条件的要求,必须将焊缝缺陷铲除从新焊补(即返修)。这种情况在我厂常有发生,特别是机车锅炉焊缝,经x光检查发现的内部缺陷,由于铲除时缺乏准确性或因第二次焊接时又产生了缺陷,有的焊缝铲焊竟达两三
In the welding process, often due to unskilled welder technology or negligence due to negligence, resulting in a variety of imperfections in the welded joints, such as poor forming, porosity, slag inclusion, incomplete penetration and so on. In order to eliminate these defects so that the weldment to meet the technical requirements, the weld defects must be removed from the new welding repair (that is, rework). This situation often occurs in our plant, especially locomotive boiler welds, the internal defects found by X-ray examination, the lack of accuracy due to eradication or because of the second welding has a defect, and some weld shovel welding As many as two or three