Effect of parameters in diode laser welding of steel sheets

Veli Kujanpaeae; Petteri Maaranen; Tapio Kostamo

doi:10.1117/12.497964

3 March 2003 Effect of parameters in diode laser welding of steel sheets

Veli Kujanpaeae, Petteri Maaranen, Tapio Kostamo

Proceedings Volume 4831, First International Symposium on High-Power Laser Macroprocessing; (2003) https://doi.org/10.1117/12.497964
Event: LAMP 2002: International Congress on Laser Advanced Materials Processing, 2002, Osaka, Japan

Abstract

Austenitic stainless steel sheets and ordinary cold-rolled carbon steel sheets with variable thickness were welded with 1 kW diode laser. Different weld joints were utilized. The optimal parameters for each case were determined. The joints were examined by metallography and mechanical testing. The results show that diode laser is an optimal tool for sheet metal welding, when a considerable narrow weld is aimed. The edges prepared by mechanical sheering are acceptable as the joint preparation. The tensile strength and ductility of all the joints were acceptable and on the same level or better than that of base metal. The shielding gas seems to play a much higher role than in conventional laser welding (CO₂ or Nd:YAG laser welding). When using the non-oxidizing shielding gas (nitrogen or argon), the welding speed to be reached is much slower than when welding without any shielding gas. This is probably due to the increase of absorption by oxygen.

Citation Download Citation

Veli Kujanpaeae, Petteri Maaranen, and Tapio Kostamo "Effect of parameters in diode laser welding of steel sheets", Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); https://doi.org/10.1117/12.497964

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