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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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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

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  • Received Date: October 17, 2013
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    • 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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    • References (9)
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