Patent ID: 6680085
Filing Date: 2004-01-20
Classification: C23C

Abstract:
A method for thermal spraying of metals for coating a surface, wherein the metal for coating is fed in the form of a wire, the wire is melted to form molten metal, and the molten metal is sprayed using atomizing gas from a nozzle, characterized in that (a) the wire is melted by a compressed-air or inert-gas plasma arc, wherein the plasma arc is formed between a non-melting stationary electrode and a melting electrode formed by the wire, and (b) the molten metal is sprayed by the atomizing gas in a stream in the direction the wire is fed, wherein the wire is surround by the atomizing gas in an annular arrangement, and wherein the gas supply rate for the plasma arc and the gas supply rate for the formation of the atomizing gas are set differently.