Keywords
spot welding
laser welding
dual-phase steel
laser welding
dual-phase steel
How to Cite
Viňáš, J., & Kaščák, Ľuboš. (2016). Analysis of weldability of dual-phase steel used in automotive industry. Advances in Mechanical and Materials Engineering, 33(293 (3), 259-266. https://doi.org/10.7862/rm.2016.21
Abstract
This paper deals with the problems of weldability of high strength dual-phase steel sheets used in the car body production. The properties of the joints made by resistance spot welding (RSW) and laser welding were analysed. The two grades of dual-phase steels such as DP 600 and DP 800 were used. The joints were made by overlapping of two sheets in the method 21 according to EN ISO 4063 (RSW), and as butt weld without a gap by laser welding (method 52 in EN ISO 4063). The parameters of RSW and laser welding were chosen according to the recommendations of IIW. The quality of welded joints was evaluated by visual control, static tension test, and a microstructural analysis of the joints on the light microscopy.
References
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2. Zhang X., Chen G., Zhang Y., Lai X.: Improvement of resistance spot weldability for dual-phase (DP600) steels using servo gun, J. Mat. Proc. Technol., 209 (2009) 2671-2675.
3. Hernandez V.H.B., Panda S.K., Okita Y., Zhou N.Y.: A study on heat affected zone softening in resistance spot welded dual phase steel by nanoindentation, J. Mat. Sci., 45 (2010) 1638-1647.
4. Kaščák Ľ., Brezinová J., Mucha J.: Evaluation of corrosion resistance of galvanized steel sheets used in automotive production, Mat. Sci. Forum, 818 (2015) 141-144.
5. Dancette S., Fabregue D., Estevez R., Massardier V., Dupuy T., Bouzekri M.: A finite element model for the prediction of Advanced High Strength Steel spot welds fracture, Eng. Fracture Mech., 87 (2012) 48-61.
6. Kaščák Ľ., Spišák E., Gajdoš I.: Influence of welding parameters on the quality of resistance spot welded joints of DP600 steels, Key Eng. Mat., 635 (2015) 143-146.
7. Pouranvari M., Marashi S.P.H., Jaber H.L.: DP780 dual-phase-steel spot welds: critical fusion-zone size ensuring the pull-out failure mode, Mat. Technol., 49 (2015) 579-585.
8. Lifang M., Jiming Y., Dongbing Y., Jinwu L., Genyu C.: Comparative study on CO2 laser overlap welding and resistance spot welding for galvanized steel, Mat. Design, 40 (2012) 433-442.