Protective coating for turbine blades
AssigneeForschungszentrum Karlsruhe GmbH
InventorsHans-Henning Hennies, Gunther Kessler, Gerd Krafft, Georg Muller, Gustav Schumacher
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Abstract
On a turbine blade a protective corrosion resistant surface layer consisting of a MCrAlY alloy is generated by melting the surface of the turbine blade with the MCrAlY alloy uniformly distributed over the surface of the turbine blade by a pulsed electron beam to a depth of 5-50 .mu.m whereby a smooth surface is generated.
Claims3
A turbine blade having a protective corrosion resistant surface layer consisting of a MCrAlY alloy wherein M is a base metal, said protective layer having a depth of 5-50 .mu.m and being uniformly distributed over the surface of said turbine blade as a single phase alloy generated by being melted in place by a pulsed electron beam, said protective layer, after being melted by said pulsed electron beam, being rapidly cooled such that there is no time for phase separations, whereby a single-phase monocrystalline surface layer is provided.
Dependencies are inferred from the claim text.