Abstract
The corrosion resistance performance of SAF2205 duplex stainless steel depends on the amount of ferrite to austenite transformation, but the ferrite content after power beam welding is always excessively high. To obtain laser beam welding joints with better mechanical and corrosion resistance performance, the effects of the energy density and shielding medium on the austenite content, hardness distribution, and shear strength were investigated. The results showed that ferrite to austenite transformation was realized with increase in the energy density. When the energy density was increased from 120 J/mm to 200 J/mm, the austenite content of the welding joint changed from 2.6% to 38.5%. Addition of nitrogen gas to the shielding medium could promote formation of austenite. When the shielding medium contained 50% and 100% nitrogen gas, the austenite content of the welding joint was 42.7% and 47.2%, respectively. The hardness and shear strength were significantly improved by increase in the energy density. However, the shielding medium had less effect on the mechanical performance. Use of the optimal welding process parameters resulted in peak hardness of 375 HV and average shear strength of 670 MPa.
Similar content being viewed by others
References
F. Kolenic, L. Kovac, and D. Drimal, Weld. World 55, 19 (2011).
L. Karlsson and H. Arcini, Weld. World 56, 41 (2012).
J. Verma and R.V. Taiwade, J. Manuf. Process. 25, 134 (2017).
K.P. Davidson and S. Singamneni, JOM 69, 569 (2017).
A. Vinoth Jebaraj, L. Ajaykumar, C.R. Deepak, and K.V.V. Aditya, J. Adv. Res. 8, 183 (2017).
F. Mirakhorli, F. Malek Ghaini, and M.J. Torkamany, J. Mater. Eng. Perform. 21, 2173 (2012).
V.D. Cojocaru, D. Raducanu, and M.L. Angelescu, et al., JOM 69, 1439 (2017).
T. Ogawa and T. Koseki, Weld. J 68, 181 (1989).
H.Y. Ha, M.H. Jang, and T.H. Lee, Corros. Sci. 89, 154 (2014).
M. Keskitalo, K. Mäntyjärvi, J. Sundqvist, J. Powell, and A.F.H. Kaplan, J. Mater. Process. Technol. 216, 381 (2015).
W.W. Zhang and S. Cong, Int. J. Adv. Manuf. Technol. 92, 4161 (2017).
Acknowledgements
This paper was financially supported by the Natural Science Foundation of China (51705484, 51701196). The authors would like to take this opportunity to express their sincere appreciation.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhang, W.W., Cong, S., Luo, S.B. et al. Effects of Energy Density and Shielding Medium on Performance of Laser Beam Welding (LBW) Joints on SAF2205 Duplex Stainless Steel. JOM 70, 1554–1559 (2018). https://doi.org/10.1007/s11837-018-2872-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11837-018-2872-6