The Influence of Shielding Gas on Strength of the Laser Welded Thin Sheet Lap Welds

Abstract:

The laser welding is usable method for joining thin plates with low energy input and precise penetration control. When joining of very thin sheets such as 0.5 mm the shape of the weld must be complete in order to achieve a good strength of the joint. The part of the test welds were welded without shielding gas and other part of the test welds by using 65 mm shielding gas nozzle behind the key hole. The strength of the laser weld of 0.5 mm Austenitic stainless steel (ASS) plate was measured in welds without shielding gas and Ar shielded weld. The strength of the shielded weld joints was significantly better than the joint weld without shielding gas due to convex shielded welds. In addition the shielded welds were bright which improves the corrosion properties of the joint.

• Periodical: Key Engineering Materials (Volume 786)
• Pages: 98-103
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.786.98
• Online since: October 2018
• Authors: Markku Keskitalo*, Aappo Mustakangas, Mikko Hietala, Kari Mäntyjärvi
• Keywords: Austenitic Stainless Steel, Lap Weld, Laser Welding, Shielding Gas

References

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