US 9,850,566 B2 · Method for coating a component of a turbomachine and coated component for a turbomachine

Abstract

The invention relates to a coating system for a component of a turbomachine, which includes at least two different base powders. Each of the at least two different base powders has an individual predetermined distribution within the coating system. Further, each of the at least two different base powders is responsible for a specific property of the coating system.

Drawings

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Drawings

Claims7

Dependent claims

A coating system for a component of a turbomachine, comprising:

a first powder feeder configured to feed a first composite powder to a sprayer via a first line for applying the first composite powder onto the surface of the component;
a second powder feeder configured to feed a second composite powder to the sprayer via a second line for applying the second composite powder onto the surface of the component, the second composite powder having a composition that differs from a composition of the first composite powder;
wherein the first powder feeder and second powder feeder are configured such that oxidizing media, fuel, the first composite powder and the second composite powder are simultaneously feedable onto the surface of the component to deposit the coating on the surface of the component such that a first portion of the coating covering a first portion of the surface adjacent a leading edge of the component has a first composition and a second portion of the coating covering a second portion of the surface adjacent a trailing edge of the component has a second composition via adjustment of a ratio between the first composite powder and second composite powder fed to the sprayer controlled during feeding of the multiple different powders, fuel, and oxidizing media onto the surface of the component;
the first powder feeder and the second powder feeder configured to be controlled such that the first composition has a greater proportion of the first composite powder than the second composition such that the first portion of the coating has a greater ductility than the second portion of the coating and the second portion of the coating has a greater oxidation resistance than the first portion of the coating;
a source of the first composite powder that is connected to the sprayer via the first line such that the first composite powder is passable to the first powder feeder to feed the first composite powder onto the surface of the component via the sprayer, wherein said first composite powder is a powder blend of two or more different powders having one of a different size distribution, composition and particle shape;
and
a source of the second composite powder that is connected to the sprayer via the second line such that the second composite powder is passable to the sprayer to feed the second composite powder onto the surface of the component via the sprayer, wherein said second composite powder is a powder blend of two or more different powders having one of a different size distribution, composition and particle shape.

4 more elements

Dependencies are inferred from the claim text.

Description6,344 words

Summary2,451 words

#This application claims priority to European application 13160051.2 filed Mar. 19, 2013, the contents of which are hereby incorporated in its entirety.

#The present invention relates to the technology of turbomachines, especially gas turbines. It refers to a method for coating a component of a turbomachine according to the preamble of claim 1.

#It further refers to a coated component for a turbomachine.

Brief description of the drawings5 figures

#The present invention is now to be explained more closely by means of different embodiments and with reference to the attached drawings.

#FIG. 1 shows in a simplified drawing a configuration for coating a turbine blade by thermal spraying according to an embodiment of the invention;

#FIGS. 2a-b shows the variation certain properties of modular coating in a three-powder-system (FIG. 2a) and a two-powder-system (FIG. 2b);

Detailed description3,742 words

#The invention describes a method to produce and apply modular coatings, where the coating properties can easily be modified from one component to another, locally on the component or even through the depth of the coating by combining several powders, each powder being responsible for one or more specific features of the final coating.

#The use of flexible powder system(s) and a novel coating manufacturing method are the basis to reach the described purpose. This flexible coating method allows reaching individually tailored coating microstructure and correlated mechanical and/or physical properties of the coating.

#The concept of modular coating according to the present invention is based on three main points: The use of different powders, each bringing a specific property to the final coating. The use of a composite powder concept, allowing an easier tuning of the powder composition, the size distribution and the spray ability of the powder. The use of a novel spraying method, wherein several powder feeders are used and each powder composing the coating can be fed and controlled independently from each other. Thereby the fraction of each powder can be tuned on-line during spraying, allowing the final coating composition and microstructure to answer very specific and local requirements on the parts.

Facts

Application

14/214,980Filed 16 Mar 2014

Priority

EP 1316005119 Mar 2013

Published

US 2014/0287149 A125 Sep 2014

Granted

26 Dec 2017

Term ends

15 Jul 2035

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 486 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification11 codes

C23C 4/04
Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge: characterised by the coating material
B05B 7/14
Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas:…
B05B 7/20
Incorporating means for heating or cooling the material to be sprayed: by flame or combustion
C23C 4/02
Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge: pretreatment of the material to be…

Timeline

19 Mar 2013Priority claimedEP 13160051
16 Mar 2014Application filedUS 14/214,980
24 Mar 2014Assigned to Alstom Technology Ltdassignment of assignor's interest
25 Sep 2014PublishedUS 2014/0287149 A1
22 Mar 2016Assigned to General Electric Technology GmbHchange of name
16 Feb 2017Assigned to Ansaldo Energia IP UK Limitedassignment of assignor's interest
26 Dec 2017GrantedUS 9,850,566 B2
12 Oct 2026TodayWithin its term
15 Jul 2035Term endsEstimated, includes 486 days of adjustment

Method for coating a component of a turbomachine and coated component for a turbomachine

Life of this patent

Method for coating a component of a turbomachine and coated component for a turbomachine

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims7

Description6,344 words

Drawings

Classification11 codes

Life of this patent

Description6,344 words