Effect of Alloy Content in Hardox450+FeW Composites Alloyed by PTAW on Wear Characteristic

Abstract

In this study, Hardox450 + FeW alloys were coated on AISI1020 substrate material by using plasma transferred arc welding (PTAW) technique. The ratios of the coating materials were chosen as 5, 10, 15, 20 and 25 wt % FeW. The coating process was carried out as the current density (130 A), shielding gas (pure argon), shielding gas flow rate (25 L min(-1)), plasma gas flow rate (0.8 l min(-1)), welding speed (0.01 m min(-1)) and electrode diameter (3.2 mm). The coated alloys were characterized by optical microscope (OM), Scanning electron microscope (SEM), Elemental mapping, Energy dispersive spectrometer (EDS) and X-Ray diffractometer (XRD). Moreover, microhardness and wear tests were applied to determine the mechanical behavior. After wear test, wear rates were calculated by the mass losses of the specimens. The morphologies of worn surfaces were evaluated by SEM. Hardox450 + 25 wt % FeW showed the most combination in terms of wear performance with lower wear values under high-stress wear.