CORROSION-RESISTANT AND WEAR-RESISTANT COATING METHOD OF STEAM TURBINE MEMBER, AND STEAM TURBINE MEMBER COATED BY THE METHOD

PROBLEM TO BE SOLVED: To provide a corrosion-resistant and wear-resistant coating method of a steam turbine member, and the steam turbine member coated by the method in which the property of a spray deposit film is firm, the lifetime of the steam turbine member in erosion damages is prolonged, and t...

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Bibliographische Detailangaben
Hauptverfasser:	OTSUKI MASAHIKO, IKEDA KAZUAKI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a corrosion-resistant and wear-resistant coating method of a steam turbine member, and the steam turbine member coated by the method in which the property of a spray deposit film is firm, the lifetime of the steam turbine member in erosion damages is prolonged, and the turbine performance is improved. SOLUTION: In the coating method, a carbide-based spray deposit film of the film thickness of 0.4-1.0 mm is deposited on a surface of a turbine member 1 forming a steam passage part of a steam turbine by the high-pressure/high-speed flame thermal spraying, the surface of the spray deposit film 2 is heated by a heat source having the high energy density such as laser and EBW (electron beam welding), the spray deposit film is melted from the outer surface thereof to the depth of about 1/2 of the film thickness, and solidified to form a sealed layer 3. COPYRIGHT: (C)2006,JPO&NCIPI