New Filler materials for Manual Metal Arc Welding of Spheroidal Graphite and Malleable Irons
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Authors
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Dept. of Metallurgy, I.I.Sc., Bangalore-560012 ,IN
M. S. Gopalakrishna -
Dept. of Metallurgy, I.I.Sc., Bangalore-560012 ,INK. S. Raman
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Dept. of Mech. Engg., I.I.Sc., Bangalore-560012 ,INB. S. Vaideswaran
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Dept. of Mech. Engg., I.I.Sc., Bangalore-560012 ,INM. R. Seshadri
Abstract
Feasibility test on calcium oxide-silica-calcium fluoride system with other consumables as the flux on spheroidal graphite (S.G.) core wire for multi-pass manual metal arc welding of S.G. iron base metal and malleable iron (M.I.) base metal has been carried out with a constant pre-heat of 500°C. Under similar conditions of welding, the same flux system on high carbon steel core wire has also been tried on M.I. base metal alone. Structure compatibility between the weldment and the base metal in as-welded condition was aimed at, by welding in a groove design used by Schaeffler and Schumbacker. The metallurgical factors involved in the welding process have been studied. The results obtained are promising and favourable. The structures obtained in the weldment are amenable to post weld heat-treatment and resulted in completely favourable microstructures.
