EP0260511A2
Expired / Lapsed
EP
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Method of forming strong fatigue crack resistant nickel base superalloy and product formed
Assignee: General Electric Co
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Filing: 1987-08-31
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Granted: —
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Expires: 2007-08-31
Abstract
Abstract A novel alloy is provided having approximately the following ingredient formula: The alloy has a low solvus temperature for the γʹ precipitate thus facilitating metal processing and treatment and also forging of the metal. Fatigue crack propagation rate is remarkably low for metal samples cooled at rates of 20°C/min to 200°C/min.
Inventors
- 👤 Keh-Minn Chang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:53
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/10; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/056
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
10 words
A nickel base superalloy composition having essentially the following composition
Claim 2
Dependent Claim
10 words
A nickel base superalloy composition having essentially the following composition
Claim 3
Dependent Claim
28 words
The alloy of claim 1 which has a low fatigue crack propagation rate and which has been supersolvus annealed and cooled at a rate of less than 250°C/min.
Claim 4
Dependent Claim
30 words
The alloy of claim 1 which has a low fatigue crack propagation rate, which has been supersolvus annealed and which has been cooled at a rate between 20°C/min and 200°C/min.
Claim 5
Dependent Claim
16 words
The alloy of claim l in which the solvus temperature is lower than closely comparable alloys.
Claim 6
Dependent Claim
13 words
The alloy of claim 1 in which the solvus temperature is about 1080°C.
Claim 7
Dependent Claim
12 words
The alloy of claim 1 in which the composition is as follows:
Claim 8
Independent Claim
40 words
The method of preparing a nickel base superalloy which comprises preparing a melt of the following approximate ingredient content cooling the melt to a solid, supersolvus annealing the solid, and cooling the solid at a rate of 250°C/min. or less.
Claim 9
Independent Claim
40 words
The method of preparing a nickel base superalloy which comprises preparing a melt of the following approximate ingredient content cooling the melt to a solid, supersolvus annealing the solid, and cooling the solid at a rate of 250°C/min. or less.
Claim 10
Dependent Claim
15 words
The method of claim 7 in which the cooling rate is between 20°C/min and 200°C/min.
Claim 11
Dependent Claim
17 words
The method of claim 7 in which the solid is subjected to heat aging following the cooling.
Claim 12
Dependent Claim
21 words
The method of claim 7 in which the solid is subjected to heat aging at about 760°C for about 16 hours.
Claim 13
Dependent Claim
12 words
The method of claim 7 in which the composition is as follows:
Claim 14
Dependent Claim
16 words
The method of claim 7 in which the alloy is forged after cooling from the melt.
Claim 15
Dependent Claim
19 words
The method of claim 7 in which the cooling of the melt to a solid is by powder atomization.
Claim 16
Dependent Claim
19 words
The method of claim 7 in which the cooling of the melt to a solid is by spray forming.
References Cited (Backward Citations)
No citation records indexed.
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