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Modeling 2D and 3D of Hybrid Laser Nd:Yag - MIG Welding Processes

E. Le Guen[1], R. Fabbro[1], F. Coste[1], M. Carin[2], and P. Le Masson[2]
[1]LALP (CNRS)/GIP GERAILP, Arcueil, France
[2]LIMATB, Université de Bretagne Sud, Lorient, France

Hybrid laser-MIG arc welding has very interesting advantages compared to laser welding or arc welding used separately. It is known that improvement of productivity results in higher welding speeds, thicker welded materials, joint fit-up allowance, better stability of molten pool, and improvement of joint metallurgical quality. In order to use these techniques efficiently in industrial production, it is necessary to precisely understand the complex physical phenomena that govern this welding process. This paper intends to present numerical simulations of thermal phenomena in the molten bath, obtained with a 2D hydrodynamic model and 3D thermal model of Hybrid laser-MIG arc welding process. The 3D model comprises the calculation of the deformed weld pool profile.