METHOD OF APPLYING COATS

METHOD OF APPLYING COATS

FIELD: mechanical engineering; manufacture of aircraft and power turbines; protection of parts working at high temperatures including large- sized parts of turbine hot passages. SUBSTANCE: proposed method includes preliminary treatment of surface of gas-turbine engine parts. Hat protective coat cons...

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Bibliographische Detailangaben
Hauptverfasser: VARIGIN A.B, GOLOVKIN JU.I, MUBOJADZHJAN S.A, EGOROVA L.P, FURSOVA N.F
Format: Patent
Sprache:eng
Schlagworte:
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
INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL
METALLURGY
SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:FIELD: mechanical engineering; manufacture of aircraft and power turbines; protection of parts working at high temperatures including large- sized parts of turbine hot passages. SUBSTANCE: proposed method includes preliminary treatment of surface of gas-turbine engine parts. Hat protective coat consists of three layers. First layer of nickel-based alloy is applied by gas thermal method. Second layer containing aluminum is applied by drossing method, after which layer is dried at temperature of 350 C for 30-60 min and vacuum diffusion annealing is performed. Surface of coat is treated by grinding powder. Third ceramic layer is applied by gas thermal method and is subjected to finishing by vibration polishing. Then, parts is subjected to vacuum heat treatment. EFFECT: increased service life of parts; low cost of process. 7 cl, 1 tbl, 1 ex