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不同CMT工艺2014-T6焊缝成形及气孔分析

从保强, 欧阳瑞洁, 乔柳平

从保强, 欧阳瑞洁, 乔柳平. 不同CMT工艺2014-T6焊缝成形及气孔分析[J]. 焊接学报, 2015, 36(5): 37-40.
引用本文: 从保强, 欧阳瑞洁, 乔柳平. 不同CMT工艺2014-T6焊缝成形及气孔分析[J]. 焊接学报, 2015, 36(5): 37-40.
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CONG Baoqiang, OUYANG Ruijie, QIAO Liuping. Weld formation and porosity of 2014-T6 aluminum alloy welds produced by cold metal transfer process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(5): 37-40.
Citation: CONG Baoqiang, OUYANG Ruijie, QIAO Liuping. Weld formation and porosity of 2014-T6 aluminum alloy welds produced by cold metal transfer process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(5): 37-40.
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不同CMT工艺2014-T6焊缝成形及气孔分析

  • 1.

    北京航空航天大学 机械工程及自动化学院, 北京 100191

  • 2.

    上海飞机制造有限公司, 上海 200436

基金项目: 中央高校基本科研业务费专项资金资助项目

Weld formation and porosity of 2014-T6 aluminum alloy welds produced by cold metal transfer process

  • 1.

    School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China

  • 2.

    Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436, China

摘要

    摘要
  • 摘要: 分别采用3种不同的冷金属过渡(CMT)焊接工艺进行2014-T6铝合金平板堆焊成形,研究不同CMT工艺对铝合金焊缝成形特征及气孔的影响. 结果表明,保持送丝速度7.5 m/min、电弧长度和保护气体纯Ar流量25L/min不变,2014-T6铝合金常规CMT焊缝具有明显的指状熔深特征,焊缝气孔缺陷严重且呈全焊缝分布特征;脉冲CMT(CMT-P)焊缝的指状熔深特征减缓,气孔显著减少,焊接速度0.6 m/min时焊缝基本无气孔;变极性复合脉冲CMT(CMT-PADV)焊缝熔深仅约0.4 mm,成形呈显著球形特征,气孔明显减少,焊接速度0.4 m/min时基本无气孔.
    Abstract: The weld formation and porosity characteristics of 2014-T6 aluminum alloy using three different cold metal transfer welding processes were investigated. Experimental results show that, with constant wire feed speed of 7.5 m/min, contact tip to work distance of 15 mm and pure argon shielding gas flow rate of 25 L/min, finger-shape penetration is observed using the conventional CMT process and there are many gas pores in the lower and upper part of the weld. The volume of the finger-shape weld metal is decreased and the gas pore is reduced significantly using the pulsed CMT process. The porosity is almost eliminated using the welding speed of 0.6 m/min. Spherical-shape weld is achieved using the CMT welding process. The gas pore is also significantly reduced and drop to zero with the welding speed of 0.4 m/min.
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    • 参考文献(9)
  • [1] Pickin C G, Young K. Evaluation of cold metal transfer (CMT) process for welding aluminium alloy[J]. Science and Technology of Welding and Joining, 2006, 11(5): 583-585.
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    [6] Pépe N, Egerland S, Colegrove P A, et al. Measuring the process efficiency of controlled gas metal arc welding processes[J]. Science and Technology of Welding and Joining, 2011, 16(5): 412-417.
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  • 收稿日期:  2013-10-17

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