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Effect of combining Cr2O3 nano-particles and welding input parameters on the heat affected zone width in submerged arc welding process
Paper ID : 2288-UFGNSM13-FULL (R1)
Authors:
Abstract:
Submerged arc welding (SAW) is a high quality, high deposition rate welding process commonly used to join high thickness plates in load bearing components. This research work reports the combined effect of welding input parameters and Cr2O3 nano-particles on the width of the heat affected zone (HAZ) for bead-on-plate welding. A simple synthesizing procedure was used to produce Cr2O3 nano-particles. To introduce the nano-particles into the weld puddle, surfaces of mild steel plates were coated with different thicknesses of powder of Cr2O3 nano-particles. Next, a five-level, five-factor central composite rotatable design (CCRD) was used in the experiments to generate experimental data. Subsequently, mathematical model using response surface methodology (RSM) was developed to predict the HAZ width in the SAW process. For developing the regression model, the arc voltage, welding current, contact tip-to-plate distance, welding speed, and thickness of Cr2O3 nano-particles were considered as the input parameters and HAZ width as the response. The developed model was checked for its adequacy and significance. The direct and interaction effects of the input parameters on the HAZ width are presented in graphical forms. Results of experiments show that the width of HAZ was increased with the increase in heat input and Cr2O3 nano-particles. Confirmation tests also showed that the regression model can predict the HAZ width with reasonable accuracy.
Keywords:
Cr2O3 nano-particles; Submerged arc welding; Central composite rotatable design; Response surface methodology
Status : Paper Accepted (Oral Presentation)