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氧元素分布模式与AA-TIG焊熔池形貌的数值模拟

樊丁, 黄自成, 黄健康, 郝珍妮, 王新鑫, 黄勇

樊丁, 黄自成, 黄健康, 郝珍妮, 王新鑫, 黄勇. 氧元素分布模式与AA-TIG焊熔池形貌的数值模拟[J]. 焊接学报, 2016, 37(2): 38-42.
引用本文: 樊丁, 黄自成, 黄健康, 郝珍妮, 王新鑫, 黄勇. 氧元素分布模式与AA-TIG焊熔池形貌的数值模拟[J]. 焊接学报, 2016, 37(2): 38-42.
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FAN Ding, HUANG Zicheng, HUANG Jiankang, HAO Zhenni, WANG Xinxin, HUANG Yong. Oxygen distribution and numerical simulation of weld pool profiles during arc assisted activating TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(2): 38-42.
Citation: FAN Ding, HUANG Zicheng, HUANG Jiankang, HAO Zhenni, WANG Xinxin, HUANG Yong. Oxygen distribution and numerical simulation of weld pool profiles during arc assisted activating TIG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(2): 38-42.
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氧元素分布模式与AA-TIG焊熔池形貌的数值模拟

  • 1.

    兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050

  • 2.

    兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050;安徽工程大学机电学院, 芜湖 241000

  • 3.

    兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050;唐山开元焊接自动化技术研究所, 唐山 063020

基金项目: 国家自然科学基金资助项目(51205179;51074084)

Oxygen distribution and numerical simulation of weld pool profiles during arc assisted activating TIG welding

  • 1.

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

  • 2.

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

  • 3.

    School of Materials Science and Engineering Lanzhou University of Technology, Lanzhou 730050, China;Tangshan Kaiyuan Welding Automation Technology Institution, Tangshan 063020, China

摘要

    摘要
  • 摘要: 文中结合电弧辅助活性TIG焊熔池氧元素分布的试验研究结果,提出焊接熔池表面氧元素分别与熔池表面温度和位置相关两种分布模式,建立了更完善的电弧辅助活性TIG焊熔池模型,求解结果与已有的试验结果和理论研究吻合良好. 结合求解结果,利用格拉晓夫数Gr,磁雷诺数Rm和表面张力雷诺数Ma分析了浮力、电磁力和表面张力的相对作用大小; 利用Peclet数分析了熔池热对流和热传导的相对强弱. 结果表明,电弧辅助活性TIG 焊熔池表面张力作用远大于电磁力和浮力,并决定熔池流动形式;熔池热对流主导熔池的传热过程,揭示了不锈钢活性TIG焊活性元素决定深而窄的熔池形貌的内在本质.
    Abstract: In arc assisted activating TIG welding, the base metal is pre-melted by assisting arc with mixture of argon and oxygen to form an oxide layer, and TIG welding is then carried out, so the weld penetration increases significantly. In this paper, two distribution modes of oxygen on the surface of weld pool was proposed based on experimental measurements, and a more complete model of weld pool in AA-TIG welding was developed. The computed results agreed well with the experimental data and existing theoretical results. Combined with the computed results, Grashof number Gr, magnetic Reynolds number Mm and surface tension Reynolds number Ma were employed to investigate the relative importance of buoyance, Lorentz force and surface tension. Peclet number was use to distinguish the relative intensity of heat convection and heat conduction in the weld pool. The results reveal that the surface tension controlled the flow type of weld pool, and the heat convection determined the heat transfer in weld pool. The relationship between the activating elements and weld penetration during A-TIG welding was clarified.
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    • 参考文献(12)
  • [1] Leconte S, Paillard P, Chapelle P, et.al. Effect of oxide fluxes on activation mechanisms of tungsten inert gas process[J]. Science and Technology of Welding and Joining, 2006, 11(4): 389-397.
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    [8] 董文超, 陆善平, 李殿中, 等. 微量活性组元氧对焊接熔池Marangoni对流和熔池形貌影响的数值模拟[J]. 金属学报, 2008, 44(2): 249-256. Dong Wenchao, Lu Shanpin, Li Dianzhong, et al. Numerical simulation of effects of the minor active-element oxygen on the marangoni convection and the weld shape[J]. Acta Metallurgica Sinica, 2008, 44(2): 249-256.
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  • 收稿日期:  2014-09-16

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