US2023127445A1PendingUtilityA1
Method for coating a component of an aircraft engine with a wear-resistant layer, and component for an aircraft engine with at least one wear-resistant layer
Est. expiryOct 21, 2041(~15.3 yrs left)· nominal 20-yr term from priority
C22C 19/03C23C 10/48C22C 19/056C22C 19/05C22C 19/07C23C 10/18C23C 10/08C23C 4/08C23C 10/60C23C 4/134C23C 4/18C23C 10/04C23C 4/073C22C 2204/00C22C 19/051
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Claims
Abstract
A method for coating a component of an aircraft engine with a wear-resistant layer, wherein the component is first coated at least regionally with a nickel- or cobalt-based alloy and subsequently aluminized. Also disclosed is a method for producing a spray powder for producing a wear-resistant layer of a component of an aircraft engine.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A method for coating a component of an aircraft engine with a wear-resistant layer, wherein the method comprises (i) first coating the component at least regionally with a nickel- or cobalt-based alloy and subsequently aluminizing the thus coated component, or (ii) mixing a first powder of a nickel- or cobalt-based alloy with a second powder of aluminum and/or aluminum alloy, followed by thermally spraying the first and second powders at least onto a region of the component, in order to produce the wear-resistant layer, or (iii) producing a composite powder composed of a first powder consisting of a nickel- or cobalt-based alloy and of a second powder consisting of aluminum and/or an aluminum alloy, followed by thermally spraying the composite powder at least onto a region of the component, in order to produce the wear-resistant layer.
2 . The method of claim 1 , wherein in (i) the nickel- or cobalt-based alloy is aluminized by gas-phase aluminizing and/or by slip aluminizing and/or by powder pack aluminizing.
3 . The method of claim 1 , wherein in (i) the nickel- or cobalt-based alloy is aluminized by gas-phase aluminizing.
4 . The method of claim 1 , wherein in (i) the nickel- or cobalt-based alloy is aluminized by slip aluminizing.
5 . The method of claim 1 , wherein in (i) the nickel- or cobalt-based alloy is aluminized by powder pack aluminizing.
6 . The method of claim 1 , wherein in (i) the wear-resistant layer after aluminizing is subjected to a heat treatment.
7 . The method of claim 6 , wherein the heat treatment comprises diffusion annealing and/or is carried out at a reduced pressure relative to standard pressure and/or under a protective gas atmosphere.
8 . The method of claim 1 , wherein in (i) the nickel- or cobalt-based alloy, after application to the component and before aluminizing, is at least regionally nickel-plated.
9 . The method of claim 1 , wherein the nickel- or cobalt-based alloy is selected from CoMoCrSi alloys, NiMoCrSi alloys, and CoCrWNi alloys.
10 . The method of claim 1 , wherein the nickel- or cobalt-based alloy comprises
a CoMoCrSi alloy, namely T800 having the following composition:
Mo:
27-30
wt %,
Cr:
16.5-18.5
wt %
Si:
3-3.8
wt %
balance Co and unavoidable impurities.
11 . The method of claim 1 , wherein the nickel- or cobalt-based alloy comprises
a NiMoCrSi alloy, namely T700 having following composition:
Mo:
31-34
wt %,
Cr:
14.5-16.5
wt %,
Si:
3-3.8
wt %,
balance Ni and unavoidable impurities;
12 . The method of claim 1 , wherein the nickel- or cobalt-based alloy comprises
a CoCrWNi alloy with following composition:
Cr:
24.5-26.5 wt %,
W:
6.5-8.0 wt %,
Ni:
9.5-11.5 wt %,
C:
0-0.6 wt %, in particular 0.42-0.55 wt %,
balance Co and unavoidable impurities.
13 . The method of claim 1 , wherein the method comprises (i).
14 . The method of claim 1 , wherein the method comprises (ii).
15 . The method of claim 1 , wherein the method comprises (iii).
16 . A method for producing a spray powder for producing a wear-resistant layer of a component of an aircraft engine, wherein the method comprises admixing a nickel- or cobalt-based alloy with aluminum and/or an aluminum alloy, and jointly melting and/or atomizing a resultant mixture.
17 . A component for an aircraft engine, wherein the component is provided at least regionally with a wear-resistant layer, the wear-resistant layer comprising an aluminized nickel- or cobalt-based alloy.
18 . The component of claim 17 , wherein the component has been produced by a method which comprises first coating the component at least regionally with a nickel- or cobalt-based alloy and subsequently aluminizing the thus coated component.
19 . An aircraft engine which comprises at least one component according to claim 17 .Join the waitlist — get patent alerts
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