The Effects of Welding Processes on Microstructure and Abrasive Wear Resistance for Hardfacing Deposits

In this study, two different electrodes were used to examine the effect of microstructure and wear resistance for hardfacing deposits. Electrode-1 has less wear as compared to electrode-2 as the percentage of chromium, carbon and silicon is more in electrode-I. The factors such as, arc current, arc voltage, welding speed, electrode stick-out and preheat temperature predominantly influence the weld quality. The abrasion tests were conducted on a dry sand?rubber wheel abrasion machine as per ASTM G65 standard. Results revealed that as hardness increases, the loss of wear decreases. The wear surface results were analyzed by scanning electron microscopy results which indicates that the best abrasion resistance is obtained in microstructures composed of chromium carbide alloy.