The Influence of Electrode Polarity and Welding Current on Mechanical Properties of Submerged Arc Weld (SAW) in C-Mn Steels
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Authors
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Defence Metallugical Research Laboratory, Hydrabad 500 258 ,IN
G. Madhusudhan Reddy -
Welding Research Laboratory, University of Roorkee, Roorkee ,INP. K. Ghosh
Abstract
An experimental study has been carried to study the effect of electrode polarity and welding current on mechanical properties of multipass SAW welds made by using C-Mn filler wire and basic flux. Weld deposits were characterised on the basis of tensile properties, hardness and charpy impact toughness Hardness survey of the weld revealed that higher hardness occured in the coarse microstructural region than the reheat refined region. For a given polarity there was an improvement in weld impact toughness as the current decreased from 700 A to 500 A. However the trend was reverse for tensile to be better for DCEP compared to DCEN.
