Effect of flux TiO2 and wire Ti content on tolerance to high Al content welds - Effect of Al in C-Mn steels on microstructure and toughness of submerged-arc welds (Report 2):Effect of Al in C-Mn Steels on Microstructure and Toughness of Submerged-Arc Weld
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In an earlier report an initial investigation into the influence of parent plate steel deoxidation practice, and in particular Al level, on the microstructure and toughness of submerged-arc welds had shown that even small changes in weld metal Si and Al levels (e.g. 0.02 to 0.03% Al) could produce drastic deterioration in Charpy toughness when using some basic fluxes.<BR>In the present report the results are presented of further work, primarily aimed at improving the tolerance to high weld metal Al levels, by using TiO<SUB>2</SUB> additions to fluxes or Ti additions to wires.<BR>Significant improvements in toughness of high Al (0.03-0.04%) weld metals were observed by increasing flux TiO<SUB>2</SUB> contents and weld metal oxygen levels. Titanium introduced from the wire was much less effective than that introduced from TiO<SUB>2</SUB> in the flux. A schematic diagram describing the different effects of Al, Ti, Si, oxygen and flux TiO<SUB>2</SUB> content on acicular ferrite formation is proposed.
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- Effect of flux TiO2 and wire Ti content on tolerance to high Al content welds - Effect of Al in C-Mn steels on microstructure and toughness of submerged-arc welds (Report 2):Effect of Al in C-Mn Steels on Microstructure and Toughness of Submerged-Arc Weld
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