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

doi:10.3901/JME.2016.16.093

Journal of Mechanical Engineering ›› 2016, Vol. 52 ›› Issue (16): 93-99.doi: 10.3901/JME.2016.16.093

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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 Zicheng^1,2, HUANG Jiankang¹, WANG Xinxin^1,3

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

Abstract

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

XIAO Lei, FAN Ding, HUANG Zicheng, HUANG Jiankang, WANG Xinxin. 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[J]. Journal of Mechanical Engineering, 2016, 52(16): 93-99.

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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

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