Effect of Developed Activated Flux on Properties of Gas Tungsten Arc Welded Thick Gauge Section of Steels
Tungsten inert gas (TIG) welding widely known for the precise weld joint of the components due to controlled
heat input lacks the maximum weld penetration it can provide in a single pass for the steel joint, offers low -productivity and
cast to cast variation . Weld penetration being the most important parameter quantified by the aspect ratio (depth to width),
decides the number of passes required to weld a certain thickness of material. To overcome these limitations, optimized
mixture of certain oxides was developed for welding of 15mm plates of ASS which is applied by a paint brush followed by
TIG welding. Weld fusion zone having full penetration in a single pass achieving the aspect ratio even more than 1 was
observed. Various metallurgical and mechanical properties like hardness, toughness and tensile strength has been studied to
understand the effectiveness of activated flux GTAW of steels.
Keywords - TIG Welding ,Austenitic Stainless Steel, Activated Flux, Aspect Ratio, Arc Constriction, Marangoni Flow.