Jin Li, Yang Yuqing, Yao Ping, Chen Wenshi, Qian Zhiqiu, Xue Jiaxiang
School of Mechatronics Engineering, Guizhou Minzu University, Guiyang 550025, China.
College of Electromechanical Engineering, Guangdong Polytechnic Normal University, Guangzhou 510635, China.
Materials (Basel). 2022 Mar 29;15(7):2513. doi: 10.3390/ma15072513.
In this paper, a double pulse gas metal arc welding (DP-GMAW) for an AA6061-T6 aluminum alloy based on fewer basic welding parameters than the traditional DP-GMAW is proposed. This study compared the difference in pulse base currents (ΔIb) and the difference in the pulse peak currents (ΔIp) by analyzing the electrical signal and morphology properties of welded samples. The results indicated that changing ΔIp caused welding defects or even welding failure easily. The welding stability after changing ΔIb was much better than that after changing ΔIp. The individual fish-scale width of the weld joint remained unchanged when ΔIb was at different values. In addition, the average absorbed work, tensile strength, yield strength and elongation of the weld joints obtained by different ΔIb values reached 31.1%, 60.2%, 52.9% and 37.9% of the base metal, respectively.
本文提出了一种基于比传统双脉冲气体保护金属极电弧焊（DP-GMAW）更少基本焊接参数的AA6061-T6铝合金双脉冲气体保护金属极电弧焊（DP-GMAW）。本研究通过分析焊接样品的电信号和形貌特性，比较了脉冲基值电流差（ΔIb）和脉冲峰值电流差（ΔIp）。结果表明，改变ΔIp容易导致焊接缺陷甚至焊接失败。改变ΔIb后的焊接稳定性比改变ΔIp后的要好得多。当ΔIb取不同值时，焊缝接头的单个鱼鳞宽度保持不变。此外，不同ΔIb值获得的焊缝接头的平均吸收功、抗拉强度、屈服强度和伸长率分别达到母材的31.1%、60.2%、52.9%和37.9%。
