Microstructure and Performance of Iron Brass Coating Produced by High Velocity Air-Fuel Spray on Steel Surface

Iron brass coating with thickness of 3 mm was prepared on the surface of 30CrMnSi steel substrate by high velocity air-fuel spray. The chemical composition, phase composition, micro-hardness and wear properties of the coating were investigated. The results show that the iron brass coating had layered structure, fine grains, high density, lower porosity of less than 1%, high bonding strength with the substrate and micro-hardness of 241 HV. It had better wear resistance than the as-cast iron brass with same grade.