Analysis of hybrid laser Nd:YAG-MIG/MAG welding processes

Abstract

Hybrid laser-MIG arc welding presents very interesting advantages as compared to laser welding or arc welding used separately. It is known that improved productivity results from higher welding speeds, thicker materials, joint fit-up allowance, better stability of molten pool, improvement of joint metallurgical quality. In order to use efficiently these techniques for industrial production, it is necessary to precisely understand the complex physical phenomena that govern this welding process. This understanding is also necessary if one wants elaborate adequate simulations of this process. This paper will discuss preliminary results that concern the analysis of the main physical processes controlling this hybrid welding. We will also discuss the numerical approach we use for modelling this process.Hybrid laser-MIG arc welding presents very interesting advantages as compared to laser welding or arc welding used separately. It is known that improved productivity results from higher welding speeds, thicker materials, joint fit-up allowance, better stability of molten pool, improvement of joint metallurgical quality. In order to use efficiently these techniques for industrial production, it is necessary to precisely understand the complex physical phenomena that govern this welding process. This understanding is also necessary if one wants elaborate adequate simulations of this process. This paper will discuss preliminary results that concern the analysis of the main physical processes controlling this hybrid welding. We will also discuss the numerical approach we use for modelling this process.