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焊剂带约束电弧的行为已有基本的认识,用于超窄间隙焊接有明显的优势。在间隙宽度为4mm、钢板厚度为30mm的I形坡口中,进行多层单道焊剂带约束电弧超窄间隙焊接试验。整个焊接接头要通过根焊、填充焊和盖面焊来完成,通过试验分析得到各焊道所对应的焊接工艺参数。这种超窄间隙焊接方法线能量低,约为0.6kJ/mm;所得到焊接接头的热影响区宽度窄,约为1.3 mm;采用常规的CO2气保焊焊丝H08Mn2Si,超窄间隙焊缝硬度比CO2气保焊焊缝硬度提高60%。
There has been a basic understanding of the behavior of the flux band to constrain the arc and there are obvious advantages for ultra-narrow gap welding. In the I-groove with a gap width of 4mm and a steel plate thickness of 30mm, a multi-layer single-flux flux-constrained arc ultra-narrow gap welding test was carried out. The entire welded joints to be completed by root welding, filler welding and capping welding, welding test parameters obtained by the corresponding weld bead. The ultra-narrow gap welding method has a low line energy of about 0.6 kJ / mm; the width of the heat-affected zone of the welded joint is narrow, about 1.3 mm; conventional CO2 gas shielded welding wire H08Mn2Si, ultra-narrow gap weld hardness Than CO2 gas shielded welding seam hardness increased by 60%.