作者
GMD Cantin, JA Francis
发表日期
2005/4
期刊
Science and Technology of Welding & Joining
卷号
10
期号
2
页码范围
200-210
出版商
Maney Publishing
简介
A calorimetric study of gas tungsten arc welding of aluminium is described. The present study comprised experiments in which autogenous welding runs were each made on a block of electrical conductor grade aluminium. The blocks were all approximately cubic in shape which, when combined with the high thermal conductivity of aluminium, ensured that their temperature equalised soon after the completion of a run. Each sample was immersed in insulating material before welding so that heat losses to the surroundings were minimised. Thermocouples were attached to the block in each experiment and the bulk temperature rise was related to the energy input associated with the welding run. The effects of arc polarity, alternating current balance, shielding gas composition, arc length and welding current on the arc power and arc efficiency were investigated. The results obtained with alternating current are …
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GMD Cantin, JA Francis - Science and Technology of welding and joining, 2005