Towards Self-Lubricating Effect of In Situ Iron Tungstate in Rubbing WC/Mn13 Steel Cermet against a HSS Steel

We study the mechanism of formation multilayer structure subsurface regions WC/Mn13 steel cermets after sliding on a disk at speeds from 10 to 37 m/s and contact pressure 5 MPa in order elucidate fundamental role processes tribooxidation worn surface tribomechanical properties large family similar W/Fe-containing materials. It was shown that maximum antifriction effect under conditions high-speed due in-situ generated FeWO4 provided friction coefficient drop ~0.17 ~0.07 when m/s, respectively. The speed had its tribolayer thickness, so micron-sized, mechanically mixed 3–4 μm-thick layers (MML) were 20 whose wear occurred mainly by fracture delamination tile-shaped particles. Continuous tribolayers with 10–15 μm thickness 30–37 underlying zones containing fragmented deformed WC grains. Such plasticizing during flow plasticized layers.