THE JOURNAL OF INDUSTRIAL TECHNOLOGY

Volume 17, No. 02, Month MAY, Year 2021, Pages 87 - 102

Consideration of the optimizing condition in welding hardfacing on wear resistance with hot-wire gas tungsten arc welding process by response surface methodology

Sittichai Charoenrat, Yodprem Pookamnerd, Suriya Prasomthong

Abstract Download PDF

Response Surface Methodology (RSM) was used to determine optimum condition for welding hardfacing. Box-Behnken experimental design was applied to optimize the welding current, hot wire current and welding speed on wear resistant of weld. The results showed that these three factors affected on wear rate of welding hardfacing. The obtained experimental data were suitable for the quadratic equation because it showed high coefficient of determination (97.80 %). The 3D response surface plot and the contour plot derived from the mathematical models were applied to determine the optimal condition. The optimum welding condition were follows: welding current 200.505 amp, hot wire current 180 amp, and welding speed 80 mm/min, the wear rate lower of weld was 3.4366 mm3. The optimization and experiment results were then compared. The results of the comparison showed a good correspondence.

Keywords

Optimization, Hot wire, Response Surface Methodology

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