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JWJ > Volume 27(3); 2009 > Article
Journal of KWJS 2009 June;27(3) :38-43.
Published online July 6, 2009.
A Study on the Prediction of the Optimal Welding Condition for Automotive Steel Sheets in MAG Welding Process
Han-Sur Bang, Hee-Seon Bang, Sung-Min Joo, Chan-Seung Ro, Bo-Ram Sung, Han-Gil Suk





Correspondence:   Published online July 6, 2009
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%CO₂ shielding gas was 20% of that of CO₂ welding. Therefore, in terms of high productivity and welding cost, Ar mixture gas(80%Ar+20%CO₂) 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;CO₂ gas;MAG welding;Automotive steel sheets
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