Abstract
TIG welding is an important process, which is commonly used in the aircraft industry. A number of elements of airplane bodies or shields of engines are made using this technique. Numerical models of this process are needed to understand better phenomena involved in the TIG welding and to design the optimal process parameters. In the present paper numerical simulations were performed and the possibilities of modeling heat transfer in the investigated process were evaluated. Comparison of results of numerical simulations with the experimental data confirmed good predictive capabilities of the model, as far as realistic description of the phenomena involved in this process are considered. Correctness of the Goldak model, which describes density of the energy in the heat source, was confirmed as well.