Anowa, H.D,Achebo, J.IObahiagbon K.O. And Osarenmwinda J.O., Nigeria
Structures produced as a result of poor weld molten metal fluidity do not possess enough strength required to sustain its useful service life. This study was carried out with the aim of optimizing and predicting the weld molten metal fluidity of weldment. Mild steel plate was cut into dimension 60mmx40mmx10mm with a power hacksaw, grinded and cleaned before the welding process. The experimental matrix was made of twenty (20) runs, generated by the design expert 7.01 software adopting the central composite design. The responses were measured; molten metal fluidity then modelled using the response surface methodology. The result obtained in this research study shows that high molten metal fluidity produce weldment with better structural integrity. The model produced numerical optimal solution of current 150 amps, voltage of 20 volts and gas flow rate of 17l/min will produce a welded structure having molten metal fluidity of 143.33ms/kg at a desirability value of 94.6%.