EP0247582A1 - Process for depositing a protective cobalt-chromium-tungsten coating on a vane composed of a titanium alloy containing vanadium, and vane thus coated - Google Patents

Process for depositing a protective cobalt-chromium-tungsten coating on a vane composed of a titanium alloy containing vanadium, and vane thus coated Download PDF

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Publication number
EP0247582A1
EP0247582A1 EP87107674A EP87107674A EP0247582A1 EP 0247582 A1 EP0247582 A1 EP 0247582A1 EP 87107674 A EP87107674 A EP 87107674A EP 87107674 A EP87107674 A EP 87107674A EP 0247582 A1 EP0247582 A1 EP 0247582A1
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EP
European Patent Office
Prior art keywords
vanadium
chromium
temperature
blade
powder
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Granted
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EP87107674A
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German (de)
French (fr)
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EP0247582B1 (en
Inventor
André Coulon
Ulrich Bech
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Alstom Holdings SA
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Alstom SA
GEC Alsthom SA
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Priority to AT87107674T priority Critical patent/ATE60630T1/en
Publication of EP0247582A1 publication Critical patent/EP0247582A1/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106—Coating with metal alloys or metal elements only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12458—All metal or with adjacent metals having composition, density, or hardness gradient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12812—Diverse refractory group metal-base components: alternative to or next to each other

Definitions

  • the present invention relates to a method of applying a protective coating to a blade of titanium alloy comprising vanadium and to a blade thus coated.
  • Titanium alloy blades have the advantage of having a high strength / density ratio and also remarkable mechanical resistance in the most corrosive environments.
  • titanium alloy blades used in steam turbines especially when their peripheral speed is high, are quickly damaged by the water droplets that form in the steam.
  • the titanium alloy vane comprising vanadium is characterized in that it comprises at its periphery a coating layer of cobalt-chromium-tungsten alloy at least 1 mm thick covering a vanadium sublayer of thickness between 0.5 and 1.5 mm.
  • the process for installing this coating is as follows: the vanadium powder is deposited on the part of the blade to be coated, then the temperature of the powder is raised to a temperature slightly exceeding the melting point of vanadium.
  • a powder of a cobalt-chromium-tungsten alloy is then deposited on the vanadium layer, and this powder is brought to a temperature above its melting temperature and below the melting temperature of vanadium.
  • an induction heating with mobile inductor is preferably used.
  • FIG. 1 represents a perspective of the dawn according to the invention.
  • FIG. 2 represents a section of the dawn of FIG. 1.
  • FIG. 3 represents a partial view of the section of FIG. 2.
  • the steam turbine blade shown in FIG. 1 has a foot 1 and a twisted blade 2 comprising a leading edge 3 and a trailing edge 4. At the top of the blade, we deposited along the edge attack 3 on the upper side a protective coating layer 5. This coating layer extends over at least about a third of the width of the blade 2. Between the blade and the coating is a sub-layer of vanadium 6 ( fig. 2).
  • the blade is made of titanium alloy comprising 6% aluminum and between 3.5 and 4.5% vanadium.
  • the process for installing the protective covering is as follows:
  • the surface to be coated with the blade receives a conventional preparation, then virtually pure vanadium powder (> 90%) of small particle size mixed with a binder is deposited on this surface.
  • the quantity deposited is sufficient for the thickness of the final vanadium sublayer 6 to be greater than 1 mm.
  • the blade is placed in a high-frequency induction furnace equipped with a movable inductor. The oven being empty or with an inert atmosphere, the atmosphere of the oven is preheated, then the vanadium layer is heated by spot of 30 mm in diameter while keeping the spot stationary from 20 to 75 seconds and we advance by 20 mm in 20 mm .
  • the temperature is raised locally between 1950 ° C and 2000 ° C.
  • the melting temperature of vanadium is 1900 ° C and that of the titanium alloy of the order of 2400 ° C. It follows that the vanadium is melted while the titanium alloy substrate is pasty, which is ideal for obtaining perfect bonding with low dilution of the vanadium in the substrate.
  • the titanium alloy which comprises approximately 4% of vanadium can tolerate by dilution (see FIG. 3) a limited quantity of vanadium locally leading to a beta structure.
  • the thickness of this layer 7 of alloy with diluted vanadium is very small (less than 1/10 mm).
  • the temperature of the oven is brought down to ambient.
  • a powder of cobalt-chromium-tungsten alloy combined with a binder is then deposited on the vanadium sublayer.
  • This powder is deposited 3 or 4 mm from the edges of the vanadium sublayer so that there is never contact between the cobalt-chromium-tungsten alloy and the titanium alloy substrate.
  • a second cycle is started in the oven under an inert atmosphere or under vacuum, by spot heating the alloy layer to a temperature of 50 ° C higher than the melting temperature of the cobalt-chromium-tungsten alloy (1200 ° C - 1500 ° C). This temperature being much lower than the melting point of vanadium, there will be a very low dilution (see Figure 3) of the cobalt-chromium-tungsten alloy in vanadium and the vanadium / substrate bond will be kept intact, layer 8 of vanadium with diluted cobalt-chromium-tungsten alloy being very low (less than 1/10 mm).
  • the layer of alloy deposited will be approximately 1.5 mm thick.

Abstract

A method of laying a protective coating on a blade (1) made of a titanium alloy including vanadium. Vanadium powder is deposited on the portion of the blade (1) to be coated, the temperature of the powder is then raised to a temperature slightly greater than the melting point of vanadium. A powder of a cobalt-chromium-tungsten alloy is then deposited on the layer of vanadium, and this powder is raised to a temperature greater than its melting temperature and less than the melting temperature of vanadium. A blade made of an alloy of titanium including vanadium is characterized in that the blade includes a coating layer (5) of cobalt-chromium-tungsten alloy at its periphery, said layer being at least 1 mm thick and covering an underlayer of vanadium (6) which has a thickness lying in the range 0.5 mm to 1.5 mm. The resulting blade has very high resistance to abrasion by water droplets.

Description

La présente invention a trait à un procédé de pose d'un revêtement protecteur sur une aube en alliage de titane comportant du vanadium et à une aube ainsi revêtue.The present invention relates to a method of applying a protective coating to a blade of titanium alloy comprising vanadium and to a blade thus coated.

Les aubes en alliage de titane présentent l'avantage d'avoir un rapport résistance/masse volumique élevé et également une tenue mécanique remarquable dans les milieux les plus corrosifs.Titanium alloy blades have the advantage of having a high strength / density ratio and also remarkable mechanical resistance in the most corrosive environments.

Toutefois, les aubes en alliage de titane utilisées dans les turbines à vapeur, spécialement lorsque leur vitesse périphérique est élevée, sont rapidement endommagées par les gouttelettes d'eau qui se forment dans la vapeur.However, the titanium alloy blades used in steam turbines, especially when their peripheral speed is high, are quickly damaged by the water droplets that form in the steam.

Il est donc nécessaire de protéger la périphérie de ces aubes.It is therefore necessary to protect the periphery of these blades.

L'aube en alliage de titane comprenant du vanadium est caractérisée en ce qu'elle comporte à sa périphérie une couche de revêtement en alliage cobalt-chrome-tungstène d'au moins 1 mm d'épais­seur recouvrant une sous-couche de vanadium d'épaisseur comprise entre 0,5 et 1,5 mm.The titanium alloy vane comprising vanadium is characterized in that it comprises at its periphery a coating layer of cobalt-chromium-tungsten alloy at least 1 mm thick covering a vanadium sublayer of thickness between 0.5 and 1.5 mm.

Le procédé de pose de ce revêtement est le suivant : on dépose sur la partie de l'aube à revêtir de la poudre de vanadium, puis on monte la température de la poudre jusqu'à une température dépassant légèrement le point de fusion du vanadium.The process for installing this coating is as follows: the vanadium powder is deposited on the part of the blade to be coated, then the temperature of the powder is raised to a temperature slightly exceeding the melting point of vanadium.

On dépose ensuite sur la couche de vanadium de la poudre d'un alliage cobalt-chrome-tungstène, puis on porte cette poudre à une tem­pérature supérieure à sa température de fusion et inférieure à la température de fusion du vanadium.A powder of a cobalt-chromium-tungsten alloy is then deposited on the vanadium layer, and this powder is brought to a temperature above its melting temperature and below the melting temperature of vanadium.

Grâce à ce procédé une quantité minimale de vanadium est diluée dans l'aube en alliage de titane lors de la première étape. De même, lors de la seconde étape, la dilution de l'alliage cobalt-chrome-­tungstène dans la sous-couche de vanadium sera très limitée. De plus, la fusion de cette couche d'alliage n'aura aucun effet sur la liaison déjà réalisée entre sous-couche de vanadium et aube.Thanks to this process, a minimum quantity of vanadium is diluted in the titanium alloy vane during the first step. Similarly, during the second step, the dilution of the cobalt-chromium-tungsten alloy in the vanadium sublayer will be very limited. In addition, the melting of this alloy layer will have no effect on the connection already made between the vanadium sublayer and the blade.

Pour limiter les dilutions le plus possible, on utilise de préférence un chauffage par induction avec inducteur mobile.To limit the dilutions as much as possible, an induction heating with mobile inductor is preferably used.

La présente invention sera mieux comprise à la lumière de la description qui va suivre dans laquelle la figure 1 représente une perspective de l'aube selon l'invention.The present invention will be better understood in the light of the description which will follow in which FIG. 1 represents a perspective of the dawn according to the invention.

La figure 2 représente une coupe de l'aube de la figure 1.FIG. 2 represents a section of the dawn of FIG. 1.

La figure 3 représente une vue partielle de la coupe de la figure 2.FIG. 3 represents a partial view of the section of FIG. 2.

L'aube de turbine à vapeur représentée à la figure 1 comporte un pied 1 et une pale vrillée 2 comprenant un bord d'attaque 3 et un bord de fuite 4. A la partie haute de l'aube on a déposé le long du bord d'attaque 3 côté extrados une couche de revêtement protecteur 5. Cette couche de revêtement s'étend sur environ un tiers au moins de la largeur de la pale 2. Entre la pale et le revêtement est disposée une sous-couche de vanadium 6 (fig. 2).The steam turbine blade shown in FIG. 1 has a foot 1 and a twisted blade 2 comprising a leading edge 3 and a trailing edge 4. At the top of the blade, we deposited along the edge attack 3 on the upper side a protective coating layer 5. This coating layer extends over at least about a third of the width of the blade 2. Between the blade and the coating is a sub-layer of vanadium 6 ( fig. 2).

L'aube est en alliage de titane comprenant 6 % d'aluminium et entre 3,5 et 4,5 % de vanadium.The blade is made of titanium alloy comprising 6% aluminum and between 3.5 and 4.5% vanadium.

Le procédé de pose du revêtement protecteur est le suivant :The process for installing the protective covering is as follows:

La surface à revêtir de l'aube reçoit une préparation classique, puis on dépose sur cette surface de la poudre de vanadium pratiquement pur (> 90 %) à faible granulométrie mélangée avec un liant. La quantité déposée est suffisante pour que l'épaisseur de la sous-couche 6 de vanadium finale soit supérieure à 1mm. L'aube est mise dans un four à induction à haute fréquence muni d'un inducteur mobile. Le four étant à vide ou avec atmosphère inerte, on préchauffe l'ambiance du four puis on chauffe la couche de vanadium par spot de 30 mm de diamètre en maintenant le spot immobile de 20 à 75 secondes et on avance de 20 mm en 20 mm.The surface to be coated with the blade receives a conventional preparation, then virtually pure vanadium powder (> 90%) of small particle size mixed with a binder is deposited on this surface. The quantity deposited is sufficient for the thickness of the final vanadium sublayer 6 to be greater than 1 mm. The blade is placed in a high-frequency induction furnace equipped with a movable inductor. The oven being empty or with an inert atmosphere, the atmosphere of the oven is preheated, then the vanadium layer is heated by spot of 30 mm in diameter while keeping the spot stationary from 20 to 75 seconds and we advance by 20 mm in 20 mm .

On élève la température localement entre 1950°C et 2000°C. La température de fusion du vanadium est de 1900°C et celle de l'alliage de titane de l'ordre de 2400°C. Il s'ensuit que le vanadium est fondu alors que le substrat en alliage de titane est pâteux, ce qui est idéal pour obtenir un accrochage parfait avec faible dilution du vanadium dans le substrat. L'alliage de titane qui comporte environ 4 % de vanadium peut tolérer par dilution (voir figure 3) une quantité de vanadium limitée conduisant localement à une structure bêta. L'épaisseur de cette couche 7 d'alliage avec vanadium dilué est très faible (inférieure à 1/10 mm ).The temperature is raised locally between 1950 ° C and 2000 ° C. The melting temperature of vanadium is 1900 ° C and that of the titanium alloy of the order of 2400 ° C. It follows that the vanadium is melted while the titanium alloy substrate is pasty, which is ideal for obtaining perfect bonding with low dilution of the vanadium in the substrate. The titanium alloy which comprises approximately 4% of vanadium can tolerate by dilution (see FIG. 3) a limited quantity of vanadium locally leading to a beta structure. The thickness of this layer 7 of alloy with diluted vanadium is very small (less than 1/10 mm).

Après avoir balayé toute la surface de vanadium, on fait redescendre la température du four jusqu'à l'ambiante.After having swept the entire surface of vanadium, the temperature of the oven is brought down to ambient.

On dépose ensuite sur la sous-couche de vanadium une poudre d'alliage cobalt-chrome-tungstène associée à un liant.A powder of cobalt-chromium-tungsten alloy combined with a binder is then deposited on the vanadium sublayer.

Cette poudre est déposée à 3 ou 4 mm des bords de la sous-couche de vanadium de façon qu'il n'y ait jamais contact entre l'alliage cobalt-chrome-tungstène et le substrat en alliage de titane.This powder is deposited 3 or 4 mm from the edges of the vanadium sublayer so that there is never contact between the cobalt-chromium-tungsten alloy and the titanium alloy substrate.

On démarre un second cycle dans le four sous atmosphère inerte ou sous vide en chauffant par spot la couche d'alliage à une température de 50°C supérieure à la température de fusion de l'alliage cobalt-­chrome-tungstène (1200°C -1500°C). Cette température étant très inférieure à la température de fusion du vanadium, il y aura une très faible dilution (voir figure 3) de l'alliage cobalt-chrome-tungstène dans le vanadium et la liaison vanadium/substrat sera maintenue intacte, la couche 8 de vanadium avec alliage cobalt-chrome-tungstène dilué étant très faible (inférieure à 1/10 mm).A second cycle is started in the oven under an inert atmosphere or under vacuum, by spot heating the alloy layer to a temperature of 50 ° C higher than the melting temperature of the cobalt-chromium-tungsten alloy (1200 ° C - 1500 ° C). This temperature being much lower than the melting point of vanadium, there will be a very low dilution (see Figure 3) of the cobalt-chromium-tungsten alloy in vanadium and the vanadium / substrate bond will be kept intact, layer 8 of vanadium with diluted cobalt-chromium-tungsten alloy being very low (less than 1/10 mm).

La couche d'alliage déposée sera d'environ 1,5 mm d'épaisseur.The layer of alloy deposited will be approximately 1.5 mm thick.

Après avoir ramené la température du four jusqu'à l'ambiante, on procède, comme il est classique, à un traitement de détente vers 700°C.After bringing the temperature of the oven to ambient, we proceed, as is conventional, with a stress relief treatment at around 700 ° C.

Claims (3)

1/ Procédé de pose d'un revêtement protecteur sur une aube (1) en alliage de titane comportant du vanadium, caractérisé en ce qu'on dépose sur la partie de l'aube (1) à revêtir de la poudre de vanadium, puis on monte la température de la poudre jusqu'à une température dépassant légèrement le point de fusion du vanadium, on dépose ensuite sur la couche de vanadium de la poudre d'un alliage cobalt-chrome-­tungstène,puis on porte cette poudre à une température supérieure à sa température de fusion et inférieure à la température de fusion du vanadium.1 / A method of installing a protective coating on a blade (1) made of titanium alloy comprising vanadium, characterized in that one deposits on the part of the blade (1) to be coated with vanadium powder, then the temperature of the powder is raised to a temperature slightly above the melting point of vanadium, then a powder of a cobalt-chromium-tungsten alloy is deposited on the vanadium layer, then this powder is brought to a temperature higher than its melting temperature and lower than the melting temperature of vanadium. 2/ Procédé de pose selon la revendication 1, caractérisé en ce qu'on utilise un chauffage par induction avec inducteur mobile pour monter la température du vanadium et de l'alliage cobalt-chrome-tungstène.2 / A laying method according to claim 1, characterized in that an induction heating with mobile inductor is used to raise the temperature of the vanadium and the cobalt-chromium-tungsten alloy. 3/ Aube en alliage de titane comportant du vanadium caractérisée en ce qu'elle comporte à sa périphérie une couche de revêtement (5) en alliage cobalt-chrome-tungstène d'au moins 1 mm d'épaisseur recouvrant une sous-couche de vanadium (6) d'épaisseur comprise entre 0,5 et 1,5 mm.3 / Dawn of titanium alloy comprising vanadium, characterized in that it comprises at its periphery a coating layer (5) of cobalt-chromium-tungsten alloy at least 1 mm thick covering a vanadium sublayer (6) of thickness between 0.5 and 1.5 mm.
EP87107674A 1986-05-28 1987-05-26 Process for depositing a protective cobalt-chromium-tungsten coating on a vane composed of a titanium alloy containing vanadium, and vane thus coated Expired - Lifetime EP0247582B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87107674T ATE60630T1 (en) 1986-05-28 1987-05-26 METHOD OF APPLYING A COBALT CHROMIUM TUNGSTEN PROTECTIVE COATING TO A VANADIUM-CONTAINING TITANIUM ALLOY TURBINE BLADE AND PROTECTIVE COATED BLADE BLADE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607662 1986-05-28
FR8607662A FR2599384B1 (en) 1986-05-28 1986-05-28 METHOD OF LAYING A COBALT-CHROME-TUNGSTEN PROTECTIVE COATING ON A TITANIUM ALLOY BLADE COMPRISING VANADIUM AND A COATED BLADE

Publications (2)

Publication Number Publication Date
EP0247582A1 true EP0247582A1 (en) 1987-12-02
EP0247582B1 EP0247582B1 (en) 1991-01-30

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EP87107674A Expired - Lifetime EP0247582B1 (en) 1986-05-28 1987-05-26 Process for depositing a protective cobalt-chromium-tungsten coating on a vane composed of a titanium alloy containing vanadium, and vane thus coated

Country Status (11)

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US (1) US4839237A (en)
EP (1) EP0247582B1 (en)
JP (1) JPS62294185A (en)
CN (1) CN87104479A (en)
AT (1) ATE60630T1 (en)
CS (1) CS389187A2 (en)
DE (1) DE3767769D1 (en)
ES (1) ES2020224B3 (en)
FR (1) FR2599384B1 (en)
GR (1) GR3001774T3 (en)
ZA (1) ZA873836B (en)

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DE4310896C1 (en) * 1993-04-02 1994-03-24 Thyssen Industrie Mfr. process for wear resistant edges on turbine blades, pref. steam turbine blades of chrome steels and/or titanium@ base alloys - by application of a powder layer by plasma spraying or encapsulation, followed by hot isostatic pressing
EP0697503A1 (en) * 1994-08-17 1996-02-21 ABB Management AG Method for the construction of a turbine blade from an (alpha-beta)-Titanium-base alloy
EP0509758B1 (en) * 1991-04-15 1998-12-02 General Electric Company Rotary seal member and method for making

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US5077140A (en) * 1990-04-17 1991-12-31 General Electric Company Coating systems for titanium oxidation protection
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ES2020224B3 (en) 1991-08-01
JPS62294185A (en) 1987-12-21
FR2599384A1 (en) 1987-12-04
CS389187A2 (en) 1991-02-12
FR2599384B1 (en) 1988-08-05
GR3001774T3 (en) 1992-11-23
CN87104479A (en) 1988-02-03
ATE60630T1 (en) 1991-02-15
DE3767769D1 (en) 1991-03-07
EP0247582B1 (en) 1991-01-30
ZA873836B (en) 1987-11-24
US4839237A (en) 1989-06-13

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