ABSTRACT
The current work describes the evaluation of microstructural and sliding wear resistance of iron-based composite coatings. The feedstock having (70%) Metco 41C and (30%) SiC were blended mechanically through ball milling process. Further, the prepared feedstock was sprayed by HVOF method on ASTM-SA213-T11 steel substrate. Fabricated coating samples and substrate were characterized on different metallurgical and mechanical methods. The coating and substrate were taken into sliding test using pin on disc tribometer by varying parameters of normal load 10 and 20 N at temperatures 200°C, 300°C as well as room conditions without applying lubrication. The tested samples were analyzed in terms of its microstructural and phase formation using SEM and XRD techniques, respectively. The wear properties such as friction coefficient, loss of material in terms of volume and wear rate of coating and substrate were estimated utilizing system-generated data. The hardness and wear resistance of coating improved due to the existence of hard carbide phases, such as SiC and Fe2C in coating area, were detected.
