A Study on the Effect of Different Activating Flux on A-TIG Welding Process of Incoloy 800H

This study investigates the effect of different activating flux such as V₂O₅, TiO₂, MoO₃, Cr₂O₃, and Al₂O₃ on A-TIG welding process of Incoloy 800H. The influence of the flux on the depth of penetration and on mechanical and metallurgical characteristics of the weld were studied and compared with autogeneous TIG welds which were welded with the same process parameters and conditions. The use of TiO₂ flux gave full depth of penetration and the use of V₂O₅, Cr₂O₃ flux gave increased penetration as compared to autogeneous TIG welds while the use of Al₂O₃ and MoO₃ led to the detoriation of the effect.