ABSTRACT
In narrow gap TIG welding, the speed at which filler wire is fed into the weld pool is a critical parameter. It can significantly influence the weld quality, including the melting of the side walls of the joint, which can lead to a decrease heat input and reduced penetration into the side walls hence increasing the chances of such defects as lack of fusion, undercuts, or cold laps. In this work the finite element model of the narrow gap TIG welding was created. Based in that model, the influence of the filler wire speed on the heat distribution, side wall fusion and weld formation are shown.
