Mathematical Modeling For The Bead Width And Penetration In Activated Tig Welding Process

Abstract

Activate TIG (Tungsten Inert Gas) welding is used to increase the weld penetration. In A-TIG welding fluxes are mixed with solvent and applied on the weld plate before welding. In this work, A-TIG welding was used on mild steel of 10 mm thick plate for the experimental work. Experiments were performed to check the effect of various flux combination, welding speed and welding current on weld penetration and weld bead width during activated TIG welding. The response surface methodology was used to develop the second order mathematical model for the weld penetration and weld bead width. Box-Behnken experiment design was used for finding out the relationship between responses (weld penetration and weld bead width) and welding parameters (welding speed, welding current and fluxes). The analysis of variance (ANOVA) was used to test the significance of fit of the equation. Optimization of the process parameters for the maximum tensile strength and minimum weld bead width was performed using design expert statistical software.