Parametric investigation and optimization of submerged Arc welding process for IS-2062 and MS-10748 Weld
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Date
2021-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Submerged Arc Welding is a method of fusion welding in which heat is produced by an arc between the work piece and a continuously fed filler metal electrode. A dense blanket of molten flux and slag formed from the granular fluxing material pre-placed on the work protects the molten weld pool from the surrounding atmosphere. Due to heat generation there are thermal and residual effects which reduce the quality of weld joint. Also in the welding of dissimilar metals, the difference between the melting point of both metals impact the joint quality. As per researches, much work has been cited on the optimization of process parameters using Aluminium and Ferritic metals but no work was found on the parametric optimization of Submerged Arc Welding (SAW) process with different mild steel metals. Therefore, in this study process parameters optimization of SAW process using IS2062 and MS10748 metals of mild steel is done. Welding current, welding speed and wire feed rate are taken as input parameters while tensile strength and hardness were selected as responses. Experiments were performed according to Box Behnken Design and ANOVA (Analysis of Variance) was used to determine the effects of each factor on weld quality. The welding current was found to affect the quality of weld joint the most. Microstructure analysis was done with the Optical Microscope with Interfaced Computer and it was found that coarse structure is formed in fusion zone.