Abstract
In this study, the vertical incidence welding conditions of laser welding was tested to improve the finished appearance by replacing the resistance spot welding method applied to the side block of the STS301L side structure of railway vehicles. Continuous wave Nd:YAG laser welding using argon shielding gas was applied to a lap joint using STS301L-1/2H stainless steel as a base material in experiments. Multiple regression analyses were performed with 14 kinds of sample welding experimental data, and a regression equation was derived that was suitable for selecting the vertical incidence welding conditions for the laser beam. An accuracy of approximately 98 % was obtained for the predicted value. Two conditions were selected for the regression equation, and the welding quality was verified using macro-tests and tensile shear tests. A laser power of 1920 W and welding speed of 270 cm/min were selected as the optimal conditions.
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Sang Ho Jung is a Ph.D. student at the Graduate School of Future Automotive Engineering, Gyeongsang National University, Jinju, Korea. His research interests include welding, mechanical materials, production, and design engineering.
Hae Ji Kim is a Professor at the Department of Future Automotive Engineering, Gyeongsang National University, Jinju, Korea. His research interests include welding, mechanical machining and materials, production, and design engineering.
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Jung, S.H., Kim, H.J. Application of laser welding to STS301L side structure of railway vehicles(I) - vertical incidence welding conditions for laser beam based on multiple regression analysis. J Mech Sci Technol 37, 3087–3094 (2023). https://doi.org/10.1007/s12206-023-0532-4
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DOI: https://doi.org/10.1007/s12206-023-0532-4