자동차용 강판의 MAG 용접시 최적용접조건 선정에 관한 연구

초록

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.

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