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Welding in the World

, Volume 50, Issue 1–2, pp 28–34 | Cite as

Laser-MIG Hybrid Welding of Aluminium Alloys

  • K. Shibata
  • H. Sakamoto
  • T. Iwase
Technical Papers

Abstract

High-power laser welding is expected to achieve much higher productivity than conventional joining techniques. However, the gap tolerance of laser welding is smaller than that of conventional MIG welding because of its high concentrated energy input. Aluminium alloys were welded using 2 kW and 3 kW continuous-wave Nd:YAG lasers and a MIG welder as hybrid energy sources. Overlap and fillet joints of 2 mm thick sheets were made at various welding parameters, including laser power, MIG current, voltage, and welding speed. The quality of the bead, including its appearance and macrostructure, and the tensile strength of the joints were investigated. Metal pool images during welding were taken with a high-speed video camera in order to understand the welding phenomena better. Laser-MIG hybrid welding allows a larger gap tolerance at a higher welding speed in fillet joint welding. However, there is no such benefit in overlap joint welding. MIG energy only has the effect of enlarging the weld width. The weld depth is the same as in laser welding.

IIW-Thesaurus keywords

MIG welding Arc welding Gas shielded arc welding GMA welding Laser welding Photon beam welding Radiation welding Combined processes Aluminium alloys Light metals Fillet welds Lap joints Gap Joint preparation Comparisons Process parameters Process conditions Strength Mechanical properties 

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References

  1. [1]
    Hackius J., et al.: Innovation in laser hybrid technology for aluminum welding, Proceedings of ICALEO 2000, Laser Applications in the Automotive Industry, 2000.Google Scholar
  2. [2]
    Reinhart G., et al.: Laser beam welding with a hybrid laser system, Proceedings of ICALEO 2000, Laser Applications in the Automotive Industry, 2000.Google Scholar

Copyright information

© International Institute of Welding 2006

Authors and Affiliations

  • K. Shibata
    • 1
  • H. Sakamoto
    • 1
  • T. Iwase
    • 1
  1. 1.Materials Research LaboratoryNissan Motor Co., Ltd.Japan

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