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手工电弧焊单面焊双面成型操作技术是每个合格的锅炉压力容器焊工必须熟练掌握的一项技术。我们燕山焊接技术中心在多次的焊工培训和实际施工操作中,发现单面焊双面成型焊缝中常见有气孔、未焊透、焊穿、焊瘤、火口裂纹、咬边、夹渣、背面内凹等焊接缺陷。产生这些缺陷的原因有冶金、工艺参数、焊接结构等多方面因素,但在结构设计,焊接材料和焊接工艺已定的条件下,要消除这些缺陷的关键就在于每个焊工的操作技能及适当
Manual arc welding single-sided welding double-sided molding operation technology is a qualified boiler pressure vessel welder must master a technology. We Yanshan Welding Technology Center in a number of welder training and the actual construction operation, found that single-sided double-sided forming weld common porosity, penetration, welding wear, welding tumor, crater cracks, undercut, slag, Back concave and other welding defects. The causes of these defects are metallurgy, process parameters, welding structure and other factors, but in the structural design, welding materials and welding processes have been set conditions, to eliminate these defects lies in each of the welder’s operating skills and appropriate