In situ production of VC-SiO2-Fe surface composite by cast-sintering

Free energy calculation indicates that during casting, the thermodynamical condition of in situ production of VC and SiO2 particles can be satisfied. Using a new cast-sintering technique, an iron-base surface composite reinforced by VC and SiO2 particles which were produced in situ and consisting of chromium-carbides was sintered on the surface of cast iron during casting. The structure and phase construction of the surface composite were studied with the help of a SEM and an electron probe. Under the condition of dry slipping with a heavy load, the VC-SiO2-Fe surface composite offers virtually unique wear-resistance.