Abstract
Abstract Present work aims to increase the weld strength by combining Metal Inert Gas Welding (MIG) and Shielded Metal Arc Welding and reduce the dependence on inert gas used in MIG welding by relying on the flux of electrode to provide the shielding effect. It also aims to reduce the HAZ by reducing the melting of base metal, instead filling the grooves by molten mild steel electrode which is used in SMAW. Steel plates (IS-2062 grade) of 6mm thickness were welded in a single pass by placing a mild steel electrode (E6013) between them. The Shielding Gas used was CO2. Pre-weld preparations included making grooves with various included angles and Root gaps. Characterization was done using Optical Microscope. Micro-hardness test was carried out to confirm the above results. As flux of the electrode forms shielding gas and slag on the top of the weld, flow rate of the gas can be reduced to a much lower extent.
Published Version
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