Finite element investigation on the effect of arc configuration and torch angle on heat distribution in TIG-MIG hybrid welding of DSS 2205

TIG-MIG hybrid welding is a useful method to achieve the advantages of both TIG and MIG welding methods. The arc configuration and the torch angle are important parameters in the heat distribution and stability of the MIG arc in TIG-MIG hybrid welding. In this study, these two parameters were investigated using finite element simulation. First, mathematical modeling of the effect of angle on the heat source was developed, and then finite element modeling of the hybrid welding process was performed. A Fortran subroutine was used to model moving heat sources. Six different arc configuration and torch angles were designed and simulated to investigate the effect of these two parameters. The finite element results were validated using an experimental test as well as a comparison with previously published results, and a very good agreement was obtained. The output of the modeling showed that the interaction of the arcs occurs in all cases and it can cause stabilization of the MIG arc. Leading TIG arc increases the heat transferred to the workpiece and increases the maximum temperature and penetration depth of the weld. The leading arc angle increases the input heat, and the following arc angle decreases it and thus decreases the maximum temperature.

Automated summary

TIG-MIG hybrid welding combines the advantages of TIG and MIG welding methods. Finite element simulation was used to investigate the effects of arc configuration and torch angle on the heat distribution and stability of the MIG arc in hybrid welding. The results showed that different arc configurations and torch angles can influence the welding process and produce different outcomes.