PERFORMANCE EVALUATION OF C–CR– FE HARDFACING DEPOSITS PRODUCED USING SHIELDED METAL ARC WELDING (SMAW)

Abstract

This study explores the microstructure and abrasive wear behavior of chromium-based hardfacing alloys deposited using Shielded Metal Arc Welding (SMAW). Hardfacing materials made of chromium carbide are frequently used to enhance the wear resistance of industrial parts that are subjected to extreme abrasive conditions. Since, there is not much research work being done on how welding procedures affect these alloys' microstructure and tribological performance. Hardfacing layers were deposited in this study utilizing both SMAW techniques with single bead weld and double bead welds. Phase composition, carbide distribution, and the impact of welding conditions on the coatings' structural properties were all investigated by microstructural investigation utilizing optical microscopy, scanning electron microscopy (SEM), and energy dispersive X- ray spectroscopy (EDS).Standardized dry sliding wear tests were carried out to assess abrasive wear resistance, and surface profilometry and SEM measurements of the worn surfaces under controlled conditions to determine each sample's hardness. The findings showed that double bead welding techniques showed superior improvement in terms of microstructure and wear performance. In comparison to single bead welding by SMAW, Double bead welding created a finer dispersion of carbides and increased hardness, which led to superior wear resistance. These results obtained will give adequate advice for choosing appropriate welding techniques to enhance the functionality of hardfacing of materials based on chromium in abrasive conditions.