Method for vapor phase aluminiding of a gas turbine blade partially masked with a masking enclosure

Gas turbine blade (20) is selectively protected by providing gas turbine blade, providing masking enclosure (50) having airfoil enclosure (52) and dovetail enclosure (54), placing the gas turbine blade into masking enclosure to form aluminiding assembly (88), and vapor-phase aluminiding the aluminid...

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Bibliographische Detailangaben
Hauptverfasser:	YOW, KWOK HENG, LANGLEY, NIGEL BRIAN THOMAS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS 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 COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS 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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Beschreibung
Zusammenfassung:	Gas turbine blade (20) is selectively protected by providing gas turbine blade, providing masking enclosure (50) having airfoil enclosure (52) and dovetail enclosure (54), placing the gas turbine blade into masking enclosure to form aluminiding assembly (88), and vapor-phase aluminiding the aluminiding assembly with gas turbine blade. Selective protection of gas turbine blade comprises: providing gas turbine blade having airfoil (22), shank (24) with dovetail (26), and platform (28) having top and bottom surfaces (30, 32); providing masking enclosure having airfoil enclosure and dovetail enclosure; placing the gas turbine blade into masking enclosure to form aluminiding assembly; and vapor-phase aluminiding the aluminiding assembly with gas turbine blade having its airfoil and dovetail in the masking enclosure so that aluminum is deposited on exposed portion of the gas turbine blade that is not in the masking enclosure. The airfoil enclosure has top seal plate (60) with top opening (62). It is sized to receive the airfoil of the gas turbine blade. The airfoil extends through the top opening, and the top seal plate contacts the top surface of the platform. The dovetail enclosure includes dovetail guide (70) that receives lower end (72) of the dovetail, and bottom seal plate (74) with bottom opening (76). The bottom seal plate is sized to fit around the shank.