Abstract
Experimental study was carried out to analyze the effects of various welding parameters such as Welding current, Welding speed, Plate thickness and Gas flow rate on bead geometry features; such as bead reinforcement height, bead width and bead penetration of synergic welding through voltage transients for 304L stainless steel. Various thicknesses have been examined with 75% Argon and 25% CO2 as the shielding gas. The mechanical strength of welds is influenced by the composition of metal, weld bead geometry and shape relationship. The study of weld bead geometry and shape relationship is important as these dimensions and ratios decide the load bearing capacity of weldments. Metallurgical investigations determine the variation of micro-hardness across the weld metal zone, heat affected zone and the base metal. Knoop’s micro hardness is carried out to determine the hardness values of the metal at various zones. Also the microstructure of the resultant welded metal was correlated with the process variables.
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