Indian Journal of Science and Technology

Abstract

Objectives: The investigation was done with the aim of studying the influence of basicity index on mechanical properties of the structural steel. Methods/Statistical Analysis: In this experiment, influence of Basicity index on the welding characteristics was analyzed in the submerged arc welding by keeping all other variables like current, voltage and welding speed constant. The effects of wire/flux (Basicity index) on ultimate tensile strength, Microstructure and impact strength of the weld metal was investigated. Weld deposits on structural steel plates were made at different flux composition. In these experiment plates of dimension 14x125x250 mm was used for welding. The specimens were cut out from the welded plate to carry out various tests after performing the saw operation. Five different types of fluxes were used to weld the plates. Findings: The impact toughness values at room temperature increases with increase in basicity index of flux and highest micro hardness values are formed at the Heat Affected Zone (HAZ) regions for welded specimens.

Keywords: Dissimilar Metals, Steel, Welding