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FAN Ding, HUANG Zicheng, HUANG Jiankang, WANG Xinxin, HAO Zhenni, HUANG Yong. Numerical simulation of the effects of oxygen as active element on weld transportation behavior in arc assisted activating TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(3): 62-66.
Citation: FAN Ding, HUANG Zicheng, HUANG Jiankang, WANG Xinxin, HAO Zhenni, HUANG Yong. Numerical simulation of the effects of oxygen as active element on weld transportation behavior in arc assisted activating TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(3): 62-66.
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Numerical simulation of the effects of oxygen as active element on weld transportation behavior in arc assisted activating TIG welding

  • 1.

    School of Materials Science and Engineering Lanzhou University of Technology, Lanzhou 730050

  • 2.

    School of Materials Science and Engineering Lanzhou University of Technology, Lanzhou 730050;College of Mechanical and Electrical Engineering, Anhui Engineering University WuHu 241000

  • 3.

    School of Materials Science and Engineering, Chongqing University of Technology Chongqing 400054

  • 4.

    Tangshan Kaiyuan Welding Automation Technology Institution, Tangshan 063020

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  • Received Date: July 03, 2014
    Graphical Abstract
    • Abstract
  • In arc assisted activating TIG welding process, the base metal is pre-melted by an assisting arc along with mixture of argon and oxygen to form an oxide layer. After TIG welding, the weld penetration can be increased significantly. In this paper, two modes of uneven oxygen distribution at the surface of weld pool is proposed based on the experimental measurements; buoyance. A more sophisticated model of the weld pool in AA-TIG welding is developed, taking Lorentz force and surface tension into account. This model is developed to calculate the transportation hehavior of mass, momentum and energy in AA-TIG weld pool with the uneven oxygen distribution. In this paper, surface tension is a function of the temprerature coefficent and the concentration coefficient of the surface tension.The fluid flow in the weld pool is assumed to be turbulence and incompressible Newtonian fluid. The model is based on the RNG k-ε turbulence model. The experiments show that the calculated results agree well with measured value.
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    • References (18)
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