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J Weld Join > Volume 33(2); 2015 > Article
Journal of Welding and Joining 2015;33(2):85-90.
DOI: https://doi.org/10.5781/JWJ.2015.33.2.85    Published online April 30, 2015.
The characteristics of bead welding on steel with process parameter during the laser-arc hybrid welding(Ⅰ) - Effect of flow rate of shield gas and distance between laser and arc -
Jong-Do Kim*, Gi-Hoon Myung**, Moo-Keun Song**, Jae-Hwan Oh***, Jeong Suh****
Correspondence:  Jong-Do Kim,
Email: jdkim@kmou.ac.kr
Abstract
Recently many studies for improvement of productivity and automation of process are in progress, and among others, laser-arc hybrid welding that combined laser and arc has attracted much attention. Since parameters by interactions as well as the parameters of each heat source should be considered, There are a lot of hardship in actual application, even though many researches have been done so far. Therefore in this study, bead welding was done to examine the effects of the flow rate of shield gas and the distance between laser and arc during laser-arc hybrid welding. As for hybrid heat source, disk laser and MIG were used. As experiment result, sound bead and weld with no defect were formed when the flow rate of front and rear shield gas were respectively 20 l/min and 15 l/min, and deep penetration was done at DLA=3 mm.
Key Words: Hybrid welding, Parameters, Flow rate of shield gas, Distance between laser and arc


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