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  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2016, Vol. 52 ›› Issue (16): 93-99.doi: 10.3901/JME.2016.16.093

• 材料科学与工程 • 上一篇    下一篇

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考虑金属蒸汽的定点活性钨极惰性气体保护焊电弧与熔池交互作用三维数值分析

肖磊1, 樊丁1, 黄自成1,2, 黄健康1, 王新鑫1,3   

  1. 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. 安徽工程大学机电学院 芜湖 241003;
    3. 重庆理工大学材料科学与工程学院 重庆 400054
  • 出版日期:2016-08-20 发布日期:2016-08-20
  • 作者简介:

    肖磊，男，1991年出生，博士研究生。主要研究方向为高效焊接方法及数值模拟。

    E-mail：xxxiaolei@aliyun.com

    樊丁(通信作者)，男，1961年出生，教授，博士研究生导师。主要研究方向为焊接物理、焊接智能控制以及激光加工等。

    E-mail：fand@lut.cn

Three-dimensional Numerical Analysis of Interaction between Arc and Pool by Considering the Behavior of the Metal Vapor in Stationary Activating Tungsten Inert Gas Welding

XIAO Lei1, FAN Ding1, HUANG Zicheng1,2, HUANG Jiankang1, WANG Xinxin1,3   

  1. 1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals，Lanzhou University of Technology， Lanzhou 730050;
    2. School of Mechanical and Electrical， Anhui Polytechnic University， Wuhu 241003;
    3. School of Materials Science and Engineering， Chongqing University of Technology， Chongqing 400054
  • Online:2016-08-20 Published:2016-08-20

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摘要：

建立包括钨极、电弧和阳极的定点活性钨极惰性气体保护(Activating tungsten inert gas，A-TIG)焊电弧熔池交互作用统一数学模型。通过麦克斯韦方程组、连续性方程、动量守恒方程、能量守恒方程和组分输运方程的耦合求解，得到了电弧和熔池的温度、等离子体运动速度、熔池流动速度、电弧压力、电势、电流密度和金属蒸汽分布等结果。因为在A-TIG焊中，熔池的内向流动造成了大量的热被传入到熔池底部，热量的利用率更高，导致焊接熔池的表面温度比TIG焊的表面温度要高，从而引起了金属蒸汽浓度的增加，所以考虑金属蒸汽的A-TIG焊的电弧等温线较考虑金属蒸汽的TIG焊的电弧等温线有一定程度收缩。结果表明，考虑金属蒸汽对A-TIG焊熔深的模拟结果具有一定的影响，熔深减小约6%，该结果与有关试验研究结果吻合良好。

关键词: 金属蒸汽, 数值模拟, 活性钨极惰性气体保护焊

Abstract:

A three-dimensional(3D) numerical analysis model of stationary activating tungsten inert gas welding(A-TIG welding) arc in interaction with the anode material and the tungsten electrode is presented. According to the method, the distributions of temperature field and velocity field of arc plasma and weld pool, metal vapor concentration and current density in the arc plasma are investigated by solving the Maxwell equations, continuity equation, momentum conservation equation, energy conservation equation and the components of the transport equation. As it is different between A-TIG welding and TIG welding about the flow pattern, the temperature on the anode surface material in A-TIG welding is higher than that in TIG welding, then the metal vapor concentration in A-TIG welding is higher, which causing the temperature contour of A-TIG welding shrinks in the end.With the influence of the metal vapor, temperature contour of A-TIG welding also shrinks for the same reason in TIG welding and it shrinks in a bigger degree than TIG welding. It results that the weld depth decreases about 6% with the impact of metal vapor in A-TIG welding.

Key words: metal vapor, numerical modeling, A-TIG welding

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