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Volume 41 Issue 4
Apr.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(4): 589-593.
YANG Mingxuan, YANG Zhou, CONG Baoqiang, et al. Metal molten behavior with ultra high frequency pulsed arc welding[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(4): 589-593. doi: 10.13700/j.bh.1001-5965.2014.0246(in Chinese)
Citation: YANG Mingxuan, YANG Zhou, CONG Baoqiang, et al. Metal molten behavior with ultra high frequency pulsed arc welding[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(4): 589-593. doi: 10.13700/j.bh.1001-5965.2014.0246(in Chinese)
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Metal molten behavior with ultra high frequency pulsed arc welding

doi: 10.13700/j.bh.1001-5965.2014.0246

  • School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 05 May 2014
  • Rev Recd Date: 24 Jun 2014
  • Publish Date: 20 Apr 2015
    Abstract
  • Molten liquid metal is the key factor of the fundamental research during welding process, as it is the transfer element between arc behavior and solidification. Researches of the characteristics of molten pool were carried out by ultra high frequency pulsed arc welding (UHFP-AW), especially with the focus on the effect of arc force. The methods combining experiments and theoretical study were produced for the analyses of important factors, such as fluid status, velocity and temperature distribution of molten pool. And the fluid in molten surface was monitored as the supplement for further study. The results indicate the significant effect of the arc plasma on heat and force of molten pool with UHFP-AW. The monitor data demonstrate that the velocity of surface fluid is more than 30cm/s, and the double-circulation exists with surface depression caused by larger velocity during UHFP-AW. As a result, the temperature diffusion of molten pool would reduce, which can limit the impact of arc heat on base metal effectively. It is the key for controlling the grain size of titanium alloys with arc welding process.

     

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