EP1856306A1 - Component, in particular, a gas turbine component - Google Patents

Component, in particular, a gas turbine component

Info

Publication number
EP1856306A1
EP1856306A1 EP06722548A EP06722548A EP1856306A1 EP 1856306 A1 EP1856306 A1 EP 1856306A1 EP 06722548 A EP06722548 A EP 06722548A EP 06722548 A EP06722548 A EP 06722548A EP 1856306 A1 EP1856306 A1 EP 1856306A1
Authority
EP
European Patent Office
Prior art keywords
component
barrier layer
base body
component according
base
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.)
Withdrawn
Application number
EP06722548A
Other languages
German (de)
French (fr)
Inventor
Wolfgang Eichmann
Falko Heutling
Karl-Heinz Manier
Markus Uecker
Thomas Uihlein
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.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines GmbH
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 MTU Aero Engines GmbH filed Critical MTU Aero Engines GmbH
Publication of EP1856306A1 publication Critical patent/EP1856306A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0466—Nickel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
    • F05D2300/131—Molybdenum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/14—Noble metals, i.e. Ag, Au, platinum group metals
    • F05D2300/143—Platinum group metals, i.e. Os, Ir, Pt, Ru, Rh, Pd
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Definitions

  • Component in particular gas turbine component
  • the invention relates to a component, in particular a gas turbine component, according to the preamble of patent claim 1.
  • Components of a gas turbine such as the rotor blades, are provided with special anti-wear coatings to provide oxidation resistance, corrosion resistance, or erosion resistance on the surfaces.
  • the components of gas turbines are subject to wear during operation of the same or can be damaged in any other way.
  • it is generally necessary to remove or remove the wear-resistant coating from the part to be repaired in regions, partially or in total.
  • the removal or removal of coatings is also referred to as stripping.
  • stripping In the stripping process, a distinction is made between those in which the stripping takes place by mechanical means, by chemical means or by electrochemical means.
  • the present invention is based on the problem of creating a novel component, in particular a novel gas turbine component.
  • a barrier layer is positioned between the base body and the wear protection coating in order to protect the base body during a chemical or electrochemical stripping of the component.
  • a barrier layer between the main body and the wear protection coating of a coated component.
  • the barrier layer protects the main body of the component in a chemical or electrochemical stripping against attack by the stripping.
  • the barrier layer is resistant to chemical and electrochemical descaling.
  • the barrier layer preferably has a material composition adapted to the material composition of the base body, the material of the barrier layer being enriched or alloyed with a platinum group element and / or with nickel and / or with molybdenum in relation to the base material of the base body.
  • Fig. 1 is a schematic cross section through an inventive component.
  • the wear protection coating 12 is a multi-layer or multi-layer wear protection coating 12 made of the layers 13, 14 and 15.
  • the layers 13, 14 and 15 of the wear protection coating 12 may alternately comprise relatively hard and relatively soft layers or layers Act positions.
  • the number of layers of wear protection coating 12 is arbitrary and of minor importance to the present invention.
  • a barrier layer 16 is positioned between the wear protection coating 12 and the main body 11 of the construction according to the invention.
  • the barrier layer 16 is arranged between the main body 11 and the lowermost or innermost layer 13 of the wear-resistant coating 12.
  • the barrier layer 16 assumes the function of protecting the main body 11 against chemical attack during electrochemical or stratification of the component 10.
  • the barrier layer 16 is therefore resistant to chemical or electrochemical stripping and is not attacked or removed in such stripping, so that the base material of the base body 11 is not attacked or removed.
  • the barrier layer 16 has a material composition which is adapted to the material composition of the base body 11.
  • both the base body 11 and the barrier layer 16 are formed from a titanium-based alloy.
  • the material of the barrier layer 16 is enriched or alloyed with the base material of the base body 11 with at least one element of the platinum group and / or nickel and / or molybdenum.
  • the material of the barrier layer 16 platinum in a proportion of at least 0.05 wt .-% have.
  • the material of the barrier layer 16 palladium in a proportion of at least 0.05 wt .-% have.
  • the material of the barrier layer 16 may comprise nickel in a proportion of at least 0.50 wt .-% and / or molybdenum in a proportion of at least 4.00 wt .-%.
  • nickel in a proportion of at least 0.50 wt .-% and / or molybdenum in a proportion of at least 4.00 wt .-%.
  • One or more of these elements may be present in the above defined portions in the barrier layer 16.
  • the barrier layer protects the base material of the base body from attack during chemical stripping and during electrochemical stripping of the component. This ensures that in a stripping the material properties of the base material of the body are not adversely affected.
  • Another advantage of the barrier layer is that it is relatively smooth. Thus, after a delamination, a significantly better connection of a newly applied wear protection coating on the base body can be made possible than would be possible in the prior art in a body attacked or etched by the de-coating. Since the barrier layer has a material composition adapted to the material composition of the base body, there are no adaptation problems for the wear protection coating.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The invention relates to a component, in particular a gas turbine component, comprising a base body (11) which is made of a base material and of a wear-and-tear protective coating (12) which is applied to the surface of the base body (11), in particular, a coating which protects against corrosion and/or oxidation and/or erosion. According to the invention, a blocking layer (16) is positioned between the base body (11) and the wear-and tear coating (12) in order to protect the base body (11) during a chemical or electrochemical removal of a coating of the component (10).

Description

Bauteil, insbesondere Gasturbinenbauteil Component, in particular gas turbine component
Die Erfindung betrifft ein Bauteil, insbesondere ein Gasturbinenbauteil, nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a component, in particular a gas turbine component, according to the preamble of patent claim 1.
Bauteile einer Gasturbine, wie zum Beispiel die Laufschaufeln, sind zur Bereitstellung einer Oxidationsbeständigkeit, einer Korrosionsbeständigkeit oder auch einer Erosionsbeständigkeit an den Oberflächen mit speziellen Verschleißschutzbeschichtungen versehen. Die Bauteile von Gasturbinen unterliegen während des Betriebs derselben einem Verschleiß oder können auf sonstige Art und Weise beschädigt werden. Zur Reparatur von Beschädigungen ist es in der Regel erforderlich, vom zu reparierenden Bauteil die Verschleißschutzbeschichtung bereichsweise, teilweise oder auch insgesamt zu entfernen bzw. abzutragen. Das Entfernen bzw. Abtragen von Beschichtungen bezeichnet man auch als Entschichten. Bei den Ent- schichtungsverfahren unterscheidet man solche, bei denen die Entschich- tung auf mechanischem Wege, chemischem Wege oder elektrochemischem Wege erfolgt.Components of a gas turbine, such as the rotor blades, are provided with special anti-wear coatings to provide oxidation resistance, corrosion resistance, or erosion resistance on the surfaces. The components of gas turbines are subject to wear during operation of the same or can be damaged in any other way. In order to repair damage, it is generally necessary to remove or remove the wear-resistant coating from the part to be repaired in regions, partially or in total. The removal or removal of coatings is also referred to as stripping. In the stripping process, a distinction is made between those in which the stripping takes place by mechanical means, by chemical means or by electrochemical means.
Bei der chemischen oder auch elektrochemischen EntSchichtung eines Bauteils besteht die Gefahr, dass auch der Grundwerkstoff des mit der Verschleißschutzbeschichtung beschichteten "Grundkörpers angegriffen sowie abgetragen wird. Dies kann bei einigen Grundwerkstoffen, so z . B. bei Titanbasislegierungen, zu einer Verschlechterung der Werkstoffeigenschaften führen. So kann bei Titanbasislegierungen die sogenannte HCF-Festigkeit vermindert werden. Demzufolge müssen nach dem Stand der Technik bei der EntSchichtung von Bauteilen aufwendige Maßnahmen getroffen werden, um einen Angriff des Grundwerkstoffs des Grundkörpers zu vermeiden.In the case of chemical or even electrochemical stripping of a component, there is a risk that the base material of the " base body coated with the wear protection coating will also be attacked and removed." This can lead to a deterioration in the material properties of some base materials, eg titanium-based alloys. Thus, in the case of titanium-based alloys, the so-called HCF strength can be reduced. Accordingly, according to the state of the art, costly measures must be taken in the stripping of components in order to avoid attack of the base material of the base body.
Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zu Grunde, ein neuartiges Bauteil, insbesondere ein neuartiges Gasturbinenbauteil, zu schaffen.On this basis, the present invention is based on the problem of creating a novel component, in particular a novel gas turbine component.
Dieses Problem wird durch ein Bauteil, insbesondere ein Gasturbinenbau- teil, gemäß Patentanspruch 1 gelöst. Erfindungsgemäß ist zwischen dem Grundkörper und der Verschleißschutzbeschichtung eine Sperrschicht positioniert, um den Grundkörper bei einer chemischen oder elektrochemischen EntSchichtung des Bauteils zu schützen. Im Sinne der hier vorliegenden Erfindung wird vorgeschlagen, zwischen den Grundkörper und die Verschleißschutzbeschichtung eines beschichteten Bauteils eine Sperrschicht anzuordnen. Die Sperrschicht schützt den Grundkörper des Bauteils bei einer chemischen oder auch elektrochemischen Ent- schichtung vor einem Angriff durch die Entschichtung . Insofern besteht bei einer chemischen oder elektrochemischen Entschichtung eines derartigen Bauteils keine Gefahr mehr, dass die Werkstoffeigenschaften des Grundwerkstoffs des Grundkörpers negativ beeinträchtigt werden. Die Sperrschicht ist gegenüber einer chemischen sowie elektrochemischen Entschichtung resistent.This problem is solved by a component, in particular a gas turbine component, according to claim 1. According to the invention, a barrier layer is positioned between the base body and the wear protection coating in order to protect the base body during a chemical or electrochemical stripping of the component. For the purposes of the present invention, it is proposed to arrange a barrier layer between the main body and the wear protection coating of a coated component. The barrier layer protects the main body of the component in a chemical or electrochemical stripping against attack by the stripping. In this respect, in the case of a chemical or electrochemical stripping of such a component, there is no longer any danger that the material properties of the base material of the basic body will be adversely affected. The barrier layer is resistant to chemical and electrochemical descaling.
Vorzugsweise weist die Sperrschicht eine an die WerkstoffZusammensetzung des Grundkörpers angepasste WerkstoffZusammensetzung auf, wobei der Werkstoff der Sperrschicht gegenüber dem Grundwerkstoff des Grundkörpers mit einem Element der Platingruppe und/oder mit Nickel und/oder mit Molybdän angereichert bzw. legiert ist.The barrier layer preferably has a material composition adapted to the material composition of the base body, the material of the barrier layer being enriched or alloyed with a platinum group element and / or with nickel and / or with molybdenum in relation to the base material of the base body.
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ein Ausführungsbeispiel der Erfindung wird, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert . Dabei zeigt :Preferred embodiments of the invention will become apparent from the dependent claims and the description below. An embodiment of the invention will be described, without being limited thereto, with reference to the drawing. Showing:
Fig. 1 einen schematisierten Querschnitt durch ein erfindungsgemäßes Bauteil .Fig. 1 is a schematic cross section through an inventive component.
Nachfolgend wird die Erfindung unter Bezugnahme auf Fig. 1 in größerem Detail beschrieben.The invention will be described in more detail below with reference to FIG. 1.
Fig. 1 zeigt einen schematisierten Querschnitt durch ein erfindungsgemäßes Bauteil 10, wobei das Bauteil 10 aus einem Grundkörper 11 und einer auf eine Oberfläche des Grundkörpers 11 aufgebrachten Verschleißschutzbeschichtung 12 besteht. Im gezeigten Ausführungsbeispiel handelt es sich bei der Verschleißschutzbeschichtung 12 um eine mehrlagige bzw. mehrschichtige Verschleißschutzbeschichtung 12 aus den Lagen 13 , 14 und 15. Bei den Lagen 13, 14 und 15 der Verschleißschutzbeschichtung 12 kann es sich abwechselnd um relativ harte sowie relativ weiche Schichten bzw. Lagen handeln. Die Anzahl der Lagen der Verschleißschutzbeschichtung 12 ist beliebig und für die hier vorliegende Erfindung von untergeordneter Bedeutung .1 shows a schematic cross section through a component 10 according to the invention, the component 10 consisting of a base body 11 and a wear protection coating 12 applied to a surface of the base body 11. In the exemplary embodiment shown, the wear protection coating 12 is a multi-layer or multi-layer wear protection coating 12 made of the layers 13, 14 and 15. The layers 13, 14 and 15 of the wear protection coating 12 may alternately comprise relatively hard and relatively soft layers or layers Act positions. The number of layers of wear protection coating 12 is arbitrary and of minor importance to the present invention.
Im Sinne der hier vorliegenden Erfindung ist zwischen der Verschleißschutzbeschichtung 12 und dem Grundkörper 11 des erfindungsgemäßen Bau- teils 10 eine Sperrschicht 16 positioniert. Die Sperrschicht 16 ist dabei zwischen dem Grundkörper 11 und der untersten bzw. innersten Lage 13 der Verschleißschutzbeschichtung 12 angeordnet. Die Sperrschicht 16 übernimmt die Funktion, den Grundkörper 11 bei einer chemischen oder auch elektrochemischen Entschichtung des Bauteils 10 vor einem Angriff zu schützen. Die Sperrschicht 16 ist demnach gegenüber einer chemischen oder elektrochemischen Entschichtung resistent und wird bei einer solchen Entschichtung nicht angegriffen bzw. abgetragen, so dass auch der Grundwerkstoff des Grundkörpers 11 nicht angegriffen bzw. abgetragen wird.For the purposes of the present invention, between the wear protection coating 12 and the main body 11 of the construction according to the invention 10, a barrier layer 16 is positioned. The barrier layer 16 is arranged between the main body 11 and the lowermost or innermost layer 13 of the wear-resistant coating 12. The barrier layer 16 assumes the function of protecting the main body 11 against chemical attack during electrochemical or stratification of the component 10. The barrier layer 16 is therefore resistant to chemical or electrochemical stripping and is not attacked or removed in such stripping, so that the base material of the base body 11 is not attacked or removed.
Die Sperrschicht 16 verfügt über eine WerkstoffZusammensetzung, die an die WerkstoffZusammensetzung des Grundkörpers 11 angepasst ist. Vorzugsweise sind sowohl der Grundkörper 11 als auch die Sperrschicht 16 aus einer Titanbasislegierung gebildet. Der Werkstoff der Sperrschicht 16 ist gegenüber dem Grundwerkstoff des Grundkörpers 11 mit mindestens einem E- lement der Platingruppe und/oder mit Nickel und/oder Molybdän angereichert bzw. legiert.The barrier layer 16 has a material composition which is adapted to the material composition of the base body 11. Preferably, both the base body 11 and the barrier layer 16 are formed from a titanium-based alloy. The material of the barrier layer 16 is enriched or alloyed with the base material of the base body 11 with at least one element of the platinum group and / or nickel and / or molybdenum.
So kann der Werkstoff der Sperrschicht 16 Platin in einem Anteil von mindestens 0,05 Gew.-% aufweisen. Ebenso kann der Werkstoff der Sperrschicht 16 Palladium in einem Anteil von mindestens 0,05 Gew.-% aufweisen. Ebenso kann der Werkstoff der Sperrschicht 16 Nickel in einem Anteil von mindestens 0,50 Gew.-% und/oder Molybdän in einem Anteil von mindestens 4,00 Gew.-% aufweisen. Eines oder auch mehrere dieser Elemente können in den oben definierten Anteilen in der Sperrschicht 16 vorhanden sein.Thus, the material of the barrier layer 16 platinum in a proportion of at least 0.05 wt .-% have. Likewise, the material of the barrier layer 16 palladium in a proportion of at least 0.05 wt .-% have. Likewise, the material of the barrier layer 16 may comprise nickel in a proportion of at least 0.50 wt .-% and / or molybdenum in a proportion of at least 4.00 wt .-%. One or more of these elements may be present in the above defined portions in the barrier layer 16.
Wie bereits erwähnt, schützt die Sperrschicht den Grundwerkstoff des Grundkörpers vor einem Angriff bei einer chemischen Entschichtung sowie bei einer elektrochemischen Entschichtung des Bauteils. Hierdurch ist gewährleistet, dass bei einer Entschichtung die Werkstoffeigenschaften des Grundwerkstoffs des Grundkörpers nicht negativ beeinträchtigt werden. Ein weiterer Vorteil der Sperrschicht liegt darin, dass diese relativ glatt ist. So kann nach einer Entschichtung eine deutlich bessere Anbindung einer neu aufzubringenden Verschleißschutzbeschichtung am Grundkörper ermöglicht werden, als dies nach dem Stand der Technik bei einem durch das Entschichten angegriffenen bzw. angeätzten Grundkörper möglich wäre. Da die Sperrschicht eine an die WerkstoffZusammensetzung des Grundkörpers angepassten WerkstoffZusammensetzung aufweist, ergeben sich keine Anpassungsprobleme für die Verschleißschutzbeschichtung. As already mentioned, the barrier layer protects the base material of the base body from attack during chemical stripping and during electrochemical stripping of the component. This ensures that in a stripping the material properties of the base material of the body are not adversely affected. Another advantage of the barrier layer is that it is relatively smooth. Thus, after a delamination, a significantly better connection of a newly applied wear protection coating on the base body can be made possible than would be possible in the prior art in a body attacked or etched by the de-coating. Since the barrier layer has a material composition adapted to the material composition of the base body, there are no adaptation problems for the wear protection coating.

Claims

Patentansprüche claims
1. Bauteil, insbesondere Gasturbinenbauteil, mit einem Grundkörper (11) aus einem Grundwerkstoff und mit einer auf eine Oberfläche des Grundkörpers (11) aufgebrachten Verschleißschutzbeschichtung (12), insbesondere einer Schutzbeschichtung gegenüber Korrosion und/oder Oxidation und/oder Erosion, dadurch gekennzeichnet, dass zwischen dem Grundkörper (11) und der Verschleißschutzbeschich- tung (12) eine Sperrschicht (16) positioniert ist, um den Grundkörper (11) bei einer chemischen oder elektrochemischen Entschichtung des Bauteils (10) zu schützen.1. component, in particular gas turbine component, having a base body (11) made of a base material and having a surface of the base body (11) applied wear protection coating (12), in particular a protective coating against corrosion and / or oxidation and / or erosion, characterized a barrier layer (16) is positioned between the base body (11) and the wear protection coating (12) in order to protect the base body (11) during chemical or electrochemical stripping of the component (10).
2. Bauteil nach Anspruch 1, dadurch gekennzeichnet, dass die Sperrschicht (16) eine an die WerkstoffZusammensetzung des Grundkörpers (11) angepasste WerkstoffZusammensetzung aufweist.2. Component according to claim 1, characterized in that the barrier layer (16) has a material composition of the base body (11) adapted to the material composition.
3. Bauteil nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass der Werkstoff der Sperrschicht (16) gegenüber dem Grundwerkstoff des Grundkörpers (11) mit mindestens einem Element der Platingruppe und/oder mit Nickel und/oder mit Molybdän angereichert bzw. legiert ist.3. Component according to claim 1 or 2, characterized in that the material of the barrier layer (16) relative to the base material of the base body (11) is enriched or alloyed with at least one element of the platinum group and / or nickel and / or molybdenum.
4. Bauteil nach Anspruch 3, dadurch gekennzeichnet, dass der Werkstoff der Sperrschicht (16) Platin in einem Anteil von mindestens 0,05 Gew.-% aufweist.4. Component according to claim 3, characterized in that the material of the barrier layer (16) has platinum in a proportion of at least 0.05 wt .-%.
5. Bauteil nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Werkstoff der Sperrschicht (16) Palladium in einem Anteil von mindestens 0,05 Gew.-% aufweist.5. Component according to claim 3 or 4, characterized in that the material of the barrier layer (16) comprises palladium in a proportion of at least 0.05 wt .-%.
6. Bauteil nach einem oder mehreren der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass der Werkstoff der Sperrschicht (16) Nickel in einem Anteil von mindestens 0,50 Gew.-% aufweist. 6. Component according to one or more of claims 3 to 5, characterized in that the material of the barrier layer (16) comprises nickel in a proportion of at least 0.50 wt .-%.
7. Bauteil nach einem oder mehreren der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass der Werkstoff der Sperrschicht (16) Molybdän in einem Anteil von mindestens 4,00 Gew.-% aufweist.7. Component according to one or more of claims 3 to 6, characterized in that the material of the barrier layer (16) molybdenum in a proportion of at least 4.00 wt .-%.
8. Bauteil nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Grundwerkstoff des Grundkörpers (11) und der Werkstoff der Sperrschicht (16) Titanbasislegierungen sind. 8. Component according to one or more of claims 1 to 7, characterized in that the base material of the base body (11) and the material of the barrier layer (16) are titanium-based alloys.
EP06722548A 2005-03-10 2006-03-03 Component, in particular, a gas turbine component Withdrawn EP1856306A1 (en)

Applications Claiming Priority (2)

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DE102005011011A DE102005011011A1 (en) 2005-03-10 2005-03-10 Component, in particular gas turbine component
PCT/DE2006/000379 WO2006094481A1 (en) 2005-03-10 2006-03-03 Component, in particular, a gas turbine component

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EP1856306A1 true EP1856306A1 (en) 2007-11-21

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US20090269207A1 (en) 2009-10-29
CA2600198A1 (en) 2006-09-14
DE102005011011A1 (en) 2006-09-14

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