Abstract

Welding fluxes play a pivotal role in imparting requisite characteristics to the weld in submerged arc welding. The\npresent study deals with agglomerated fluxes containing CaO, Al2O3, TiO2 and MgO and their effect on hardness and impact\nstrength of the weld. Fluxes were designed in accordance with the Taguchi L8 orthogonal array, making use of the larger the\nbetter condition for two levels of voltages, namely 28 V and 32 V. A fuzzy logic based multi response performance index\n(MRPI) with thirty six fuzzy rules was developed to optimize the hardness and impact strength of the weld whereby a\nnumerical value was assigned to the multiple responses for each combination of flux.