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JWJ > Volume 37(5); 2019 > Article
Journal of Welding and Joining 2019 October;37(5) :469-476.
Published online September 30, 2019.
doi:https://doi.org/10.5781/JWJ.2019.37.5.6
A Study on Process Robustness of Lap Joint Fillet Welding in GTAW Using C Type Filler
Sang-Yeol Kim1  , Gi-Jeong Seo1, Woo-Hyeon Ju1, Sang-Myung Cho1 
1Dept. of Materials system Engineering, Pukyong Nat’l Univ, Busan, 48513, Korea
Correspondence: Sang-Myung Cho  Email: pnwcho@pknu.ac.kr
Received December 18, 2018  Revised January 21, 2019  Accepted July 15, 2019  Published online September 30, 2019
ABSTRACT
Thin plate stainless steel is mainly used for lap joint fillet welding in GTAW and GMAW pro- cesses. However, due to the machining tolerance of the product, gaps are generated, and the weld line of the product before welding is not consistent. As a result, welding defects such as burn through and discontinuous bead frequently occur. If C-Filler is used for lap joint fillet welding with GTAW, the gap bridging ability is improved compared to rod-type filler due to the wide C-Filler, and it is expected that it will be possible to prevent weld defect even if the weld line is not consistent. In this study, we examined the molten pool flow ahead of the arc by changing the push angle, inclined downward angle and deposition area in lap joint fillet welding. We also increased the gap and moved the weld line to test the process robustness.
Keywords: GTAW | C-Filler | Lap joint fillet welding | Seam leave | Gap bridging | High speed welding
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