The dynamic effects of metal vapour in gas metal arc welding

被引：54
作者：
Haidar, Jawad [1 ]
机构：
[1] CSIRO Mat Sci & Engn, Lindfield, NSW 2070, Australia
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2010年 / 43卷 / 16期
关键词：
DROPLET FORMATION; THERMAL PLASMAS; EMISSION; ARGON; COEFFICIENTS; PREDICTIONS; GMAW;
D O I：
10.1088/0022-3727/43/16/165204
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Numerical simulations for the dynamic effects of metal vapour in gas metal arc welding (GMAW) suggest that vapour from the welding droplet at the tip of the welding wire has a significant influence on the plasma properties. It is found that for the evaporation rates calculated for arcs in pure argon, the dynamic effects of metal vapour markedly cool down the plasma in the central region of the arc, leading to the formation of a low temperature zone centred on the arc axis, in agreement with experimental measurements in the literature. Radiation effects, omitted in this paper, may produce further cooling of the plasma gas. The results highlight major deficiencies in the common approach to modelling the GMAW process and suggest that accurate description of GMAW must include the influence of metal vapour on the plasma.
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页数：11
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