To obtain a coating member suitable for a member used in high temp. corrosive environments and severe wear environments caused by splash particles by applying chromium carbide coating on the surface of a base material and thereafter executing Al cementation treatment.
This invention is for a corrosion resistant and wear resistant coating member obtd. by forming a chromium carbide layer 2 on the surface of a base material 1 and forming an Al diffusive layer 3 thereon. Preferably, it is the one in which a chromium carbide layer whose outer surface is composed of an Al diffusive layer is formed on the surface of the base material, and the thickness of the chromium carbide coating layer is 50 to 500 μm, the thickness of the Al diffusive layer is 5 to 100 μm, and, furthermore, a gas turbine blade in which the chromium carbide coating layer whose outer surface is formed of an Al diffusive layer is formed is provided. Turbine moving and stationary blades, a combustor or the like withstanding use for a long time in extremely severe environments in which wear and corrosion are simultaneously generated, e.g. in a pressurized fluidized bed combustion gas turbine or the like can be obtd.
KAWAI HISATAKA
TAKAHASHI KOJI
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