Effect of Submerged Arc Welding Flux Chemical Composition on Weldment Performance(Materials, Metallurgy & Weldability)

概要

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This work focused on studying the effect of chemical composition of submerged arc welding flux on weldment performance. Five formulations of SiO_2-CaO-MnO flux were prepared using local raw materials. The performance of the formulated flux was evaluated and compared with two imported commercial fluxes. The welding conditions used were within the range recommended for the imported fluxes. It was found that at these welding conditions, the locally produced flux resulted in higher arc stability, better slag detachability, reasonable penetration, and lower hydrogen content. Also, on using the same welding wire with both imported and locally produced fluxes, lower Si and Mn contents, lower non metallic inclusion, less solidification cracking, a predominantly primary ferrite microstructure and higher toughness of weld metal were obtained in the case of locally produced flux.
大阪大学の論文