WO2007147796A1 - Procédé de revêtement d'un composant par projection de gaz froid - Google Patents

Procédé de revêtement d'un composant par projection de gaz froid Download PDF

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Publication number
WO2007147796A1
WO2007147796A1 PCT/EP2007/055996 EP2007055996W WO2007147796A1 WO 2007147796 A1 WO2007147796 A1 WO 2007147796A1 EP 2007055996 W EP2007055996 W EP 2007055996W WO 2007147796 A1 WO2007147796 A1 WO 2007147796A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
coating
cold gas
surface wave
gas jet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2007/055996
Other languages
German (de)
English (en)
Inventor
Rene Jabado
Jens Dahl Jensen
Ursus KRÜGER
Daniel Körtvelyessy
Volkmar LÜTHEN
Ralph Reiche
Michael Rindler
Raymond Ullrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2007147796A1 publication Critical patent/WO2007147796A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles

Definitions

  • the invention relates to a method for coating a component by a cold gas spraying, wherein during the coating, the component is excited with a vibration generator for carrying out oscillations.
  • a method of the type specified in the introduction is described for example in EP 1 132 497 A1. According to this method it is provided that a cold gas spraying is carried out for coating a component.
  • a so-called cold gas jet is accelerated to speeds above the speed of sound to which the coating particles are supplied.
  • the particles impinge de ⁇ is ren kinetic energy into deformation and heat vice ⁇ converts, can be reached whereby an adhesion of the particles in proportionality SSIG low temperatures.
  • EP 1 132 497 A1 it is further provided to excite the component to be coated by means of a vibration generator for carrying out oscillations whose amplitude lies in the same direction as the direction of propagation of the vibration
  • the object of the invention is to provide a method for coating a component by cold gas spraying, with which coatings can be produced with new properties.
  • This object is achieved with the initially defined method ⁇ he inventively characterized in that the vibration generator is so coupled to the component that the component in a standing, acoustic, surface acoustic wave transversal it is evidence ⁇ .
  • the formation of a standing, acoustic, transversal surface wave has the consequence that any considered point of the surface to be coated moves periodically up and down in the direction of the propagation of the cold gas jet.
  • the amplitude always remains the same (this is the property of the standing wave).
  • a standing wave therefore has the consequence that a specific point of the surface to be coated in each case performs translational oscillations of a specific amplitude. Since this amplitude has location-dependent different loading depending on the distribution of the standing surface wave, also locally different coating parameters are produced during cold gas spraying on the surface.
  • coatings can advantageously be produced which vary in particular in its layer thickness since the Ge ⁇ speed of the film-forming process depending on the information presented ⁇ coating parameters by the amplitude of the oscillations performed by the subject layer is directly affected point.
  • a layer structure with lo- kal changing layer thickness can be produced in a coating process, depending on the excited vibrations different microstructures of the surface can be generated.
  • the oscillation excitation is adapted by the oscillation generator to the eigenmodes of the component oscillations such that the surface wave generated is a linear combination of eigenmodes of the component oscillations.
  • a particular embodiment of the invention provides that the speed of the cold gas jet is adjusted in such a way that optimal coating conditions are established in the places of destructive interference of the surface wave. In other words, this means that the same coating parameters as those used are known
  • the speed of the cold gas jet is adjusted such that the particle velocity is sufficient for coating formation only around the locations of constructive interference of the surface wave, when the surface of the component is just moving counter to the propagation direction of the cold gas jet ,
  • theificatparame ⁇ be set ter of cold gas spraying so that the Pellege ⁇ speed is not sufficient in itself for coating formation. This is the case when the kinetic energy of the coating particles is too small a cause due plas ⁇ -Nazi deformation and heating adhesion of the particles on the surface to be coated.
  • grooves are produced in the coating being formed by the surfaces of constructive and destructive interference of the surface wave in the form of straight or continuously curved, substantially parallel lines covering the surface of the component.
  • the surface waves on the component surface must be excited by an eigenmode of the component vibrations, in which the locations of constructive or destructive interference as wavefronts extend linearly over the component surface. Because the surface waves are stationary, the wavefronts do not move on the component surface, which is why grooves and elevations with a linear course form due to the different deposit rates already mentioned for the coating particles.
  • the formation of the grooves is especially advantageous ⁇ illustrative of components which environmentally performing their function by a fluid are flowing. Namely, the groove formation can advantageously contribute to guiding the flow through the grooves along the component surface in the desired manner.
  • the wavelength of the surface wave generated is selected taking into account the fluid and the intended flow velocities with which it is intended to flow around the component such that the resulting grooves have a width which reduces or even avoids the formation of microturbulences at the surface, can be advantageous be achieved by way of a reduction of the flow resistance at the construction ⁇ part surface.
  • the effect of reducing the flow resistance can be explained by the fact that the formation of microturbulences at the surface is reduced.
  • a laminar flow results in a lower flow resistance of the component than a flow which is disturbed close to the component by micro-turbulence. This applies fluidically, at least for moderate to high flow ⁇ speeds.
  • the invention can be used advantageously in particular when it is punched at the component is a turbine blade han ⁇ . This is anyway provided before use in the turbine with a coating which is usually formed from a corrosion layer, in particular an MCrAlY layer and / or a thermal protective layer. If this Be ⁇ coating process of the invention produced, the result is a function of integration advantageous because the coating causes a reduction of the Strömungswi- DERS tandes, thermal protection for the turbine blade, and a corrosion protection for the turbine blades simultaneously.
  • FIG. 2 shows a perspective view of a turbine blade coated according to the method of the invention as an exemplary embodiment of the component coated in accordance with the invention.
  • a component 11 is shown schematically. This consists of a cuboid base body with a surface 12, which are excited by ultrasonic heads 13 as vibration ⁇ generator to acoustic surface vibrations.
  • An ultrasound head 13 is arranged on each of the opposite sides of the component 11 so that the surface waves propagate in opposite directions, starting from the respective ultrasound head 13.
  • a superimposition of these surface acoustic oscillations results in the schematically represented standing surface wave 14, the amplitude of which being represented by a dot-dash line. It becomes clear that the standing surface wave 14
  • cold gas jet 17a, 17b, 17c To carry out a coating by means of cold gas spraying is a schematically illustrated cold gas jet 17a, 17b, 17c at a right angle towards the surface to be coated ge 12 ⁇ .
  • To beschich ⁇ th a larger surface of the component 11 th the cold gas jet must be moved relative to the surface.
  • three positions of the cold gas jet are shown by way of example.
  • the cold gas jet 17a is exactly on directed the places of destructive interference.
  • the cold gas stream 17b is directed to locations of constructive interference 16, being indicated, that the total renovation this location ⁇ membered point of the surface just exactly opposite to the direction of the cold gas stream moves.
  • the cold gas ⁇ beam 17c is also directed to a place of constructive interference 16, wherein the belonging to this location point of the surface just moved in the same direction as the Parti ⁇ cle in the cold gas jet 17c.
  • profiles 18a, 18b of a coating 19 which are characterized by parallel grooves 20.
  • a coating can only take place if the point of the surface to be coated is just making a movement opposite to the direction of the cold gas jet (see cold gas jet 17b). This results in the maxima 21a in the layer thickness of the profile 18a.
  • the profile 18b is generated, whose maxima 21b of Schichtdi ⁇ blocks in the places are destructive interference.
  • the coating is presented as a turbine blade component 11 Darge ⁇ .
  • the goal is to provide a flow profile 22 with grooves 20, which reduce the flow resistance of the airfoil 22.
  • the coating MrAlY layer or ther- mal protective layer
  • the ultrasonic heads 13 are attached to the blade bases 23.
  • the actual flow conditions at the Strömungspro ⁇ fil which due to the simultaneous rotation of the turbine rotor not straight, but slightly ge ⁇ curved on the flow profile.
  • the aim now is to find by a suitable vibration excitation linear combinations of the eigenmodes of the component vibrations of the airfoil 22, with which the flow distribution on the airfoil can be simulated as realistic as possible. This then causes a distribution of the grooves, which does not deflect the flow of the flow at the airfoil 22.
  • the profile of the grooves 20 is shown as an example in the detail enlargement according to FIG.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé de revêtement d'un composant (11) par projection de gaz froid. Pendant le revêtement du composant, celui-ci est excité avec un générateur (13) de vibrations pour accomplir des vibrations. Conformément à l'invention, il est prévu que le composant (11) soit excité au moyen du générateur (13) de vibrations de manière à générer une onde (14) de surface stationnaire acoustique transversale. Par une modification locale des paramètres de revêtement, cela produit des profils (18a ou 18b) d'écoulement ayant notamment la forme de rainures, l'épaisseur (21a, 21b) maximale des couches pouvant notamment se trouver aux endroits (15) de l'interférence destructive ou aux endroits (16) de l'interférence constructive. Le procédé conforme à l'invention permet notamment de réaliser le revêtement de composants optimisés pour l'écoulement comme des pales de turbine.
PCT/EP2007/055996 2006-06-23 2007-06-18 Procédé de revêtement d'un composant par projection de gaz froid Ceased WO2007147796A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610029619 DE102006029619B3 (de) 2006-06-23 2006-06-23 Verfahren zum Beschichten eines Bauteils durch Kaltgasspritzen
DE102006029619.2 2006-06-23

Publications (1)

Publication Number Publication Date
WO2007147796A1 true WO2007147796A1 (fr) 2007-12-27

Family

ID=38220002

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/055996 Ceased WO2007147796A1 (fr) 2006-06-23 2007-06-18 Procédé de revêtement d'un composant par projection de gaz froid

Country Status (2)

Country Link
DE (1) DE102006029619B3 (fr)
WO (1) WO2007147796A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008052030B4 (de) * 2008-10-16 2011-06-16 Mtu Aero Engines Gmbh Verfahren zum Verbinden wenigstens einer Turbinenschaufel mit einer Turbinenscheibe oder einem Turbinenring
DE102009036407A1 (de) 2009-08-06 2011-02-10 Mtu Aero Engines Gmbh Abreibbarer Schaufelspitzenbelag
DE102010005389A1 (de) * 2010-01-22 2011-07-28 MTU Aero Engines GmbH, 80995 Strukturierte Oberflächenbeschichtung mittels kinetischem Kaltgasspritzen
DE102019102114A1 (de) * 2019-01-29 2020-07-30 Vdm Metals International Gmbh Kreuzklemme

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296815A1 (fr) * 1987-06-26 1988-12-28 National Research Development Corporation Dépôt par pulvérisation de métaux
EP1132497A1 (fr) * 1998-11-05 2001-09-12 Jury Veniaminovich Dikun Procede de production d'un revetement se composant de materiaux en poudre et dispositif de mise en oeuvre de ce procede
US6511538B1 (en) * 1998-10-29 2003-01-28 Applied Materials, Inc. Film deposition method and apparatus for semiconductor devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0296815A1 (fr) * 1987-06-26 1988-12-28 National Research Development Corporation Dépôt par pulvérisation de métaux
US6511538B1 (en) * 1998-10-29 2003-01-28 Applied Materials, Inc. Film deposition method and apparatus for semiconductor devices
EP1132497A1 (fr) * 1998-11-05 2001-09-12 Jury Veniaminovich Dikun Procede de production d'un revetement se composant de materiaux en poudre et dispositif de mise en oeuvre de ce procede

Also Published As

Publication number Publication date
DE102006029619B3 (de) 2007-07-26

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