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http://dx.doi.org/10.5781/KWJS.2009.27.3.038

A Study on the Prediction of the Optimal Welding Condition for Automotive Steel Sheets in MAG Welding Process  

Bang, Han-Sur (Dept. of Naval Architecture and Ocean Engineering, Chosun Univ)
Bang, Hee-Seon (Dept. of Naval Architecture and Ocean Engineering, Chosun Univ)
Joo, Sung-Min (Weldingcenter, RIST, Pohang)
Ro, Chan-Seung (Dept. of Naval Architecture and Mechanics, Chosun College Univ. of Science and Technology)
Sung, Bo-Ram (Hull Team, Korean Register of Shipping)
Suk, Han-Gil (Dept. of materials and metallurgical engineering Samcheok National Univ)
Publication Information
Journal of Welding and Joining / v.27, no.3, 2009 , pp. 38-43 More about this Journal
Abstract
The optimization of the welding parameters was studied to maximize the weldability and minimize the amount of spatter in the MAG welding of automotive steel sheets under different shielding gas composition ratio. JS-EFSC, JS-SPHC steel plates and Ar mixture gases were used as a substrate and shielding gas for welding respectively. The five welding parameters were selected through preliminary experiments and their effects on the weldability were analyzed. Experiments were performed using the Taguchi experimental method. As results, appropriate range for welding could be achieved. Amount of spatter in 80%Ar+20%$CO_2$ shielding gas was 20% of that of $CO_2$welding. Therefore, in terms of high productivity and welding cost, Ar mixture gas(80%Ar+20%$CO_2$) was recommended as a shielding gas for application of MAG process, indicating the low spatter and good weld quality.
Keywords
High productivity; Welding cost; Spatter; Ar mixture gas; $CO_2$ gas; MAG welding; Automotive steel sheets;
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