EP0155827A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Alloy for single crystal technology
Assignee: Cannon Muskegon Corp
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Filing: 1985-03-15
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Granted: —
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Expires: 2005-03-15
Abstract
Abstract A single crystal casting of the following composition expressed as percent by weight:- Such alloys exhibit exceptionally low steady state creep rates. Such single crystal nickel-base superalloy have very time gamma prime after heat treatment in a temperature range permitting total gamma prime solutioning without incipient melting. A component of the heat treated alloy has exceptional resistance to creep under high temperature and stress, particularly in that part of the creep curve representing one percent or less elongation.
Inventors
- 👤 Kenneth Harris
- 👤 Gary Lee Erickson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:37
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/10; C30; C30B; C30B11/00; C30B29/00; C30B29/10; C30B29/52; C30B33/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
23 words
A single crystal casting cast from an alloy consisting essentially of the following elements in the following proportions expressed as percentages of weight:
Claim 2
Dependent Claim
23 words
A single crystal casting cast from an alloy consisting essentially of the following elements in the following proportions expressed as percentages of weight:
Claim 5
Dependent Claim
34 words
A single crystal casting as claimed in Claim 1 in which the alloy from which it was cast is characterised by the capability of complete solutioning of the primary gamma prime without incipient melting.
Claim 6
Dependent Claim
40 words
A single crystal castin as claimed in Claim 1 or 2 characterised by the capability of the casting to withstanding 248 MPa at 982°C. (36 ksi at 1800°F.) for an average eighty hours before sustaining a creep of one percent.
Claim 7
Dependent Claim
30 words
A single crystal casting as claimed in Claim 1, 2 or 3 characterized by the absence of phase instability after testing under temperature and stress sufficient to rupture the casting.
Claim 8
Dependent Claim
72 words
A component for use in a gas turbine engine, cast as a single crystal from an alloy having an incipient melting temperature at least 16°C. (30°F.) above its gamma prime solvus temperature and consisting essentially of the elements Cr 6.4-6.8, Co 9.3-10.0, Mo 0.5-0.7, W 6.2-6.6, Ta 6.3-6.7, Al 5.45-5.75, Ti 0.8-1.2, Hf 0.07-0.12, Re 2.8-3.2, balance Ni and being capable of complete primary gamma prime solutioning with alternate heat treatment cycles.
Claim 9
Dependent Claim
72 words
A component for use in a gas turbine engine, cast as a single crystal from an alloy having an incipient melting temperature at least 16°C. (30°F.) above its gamma prime solvus temperature and consisting essentially of the elements Cr 6.4-6.8, Co 9.3-10.0, Mo 0.5-0.7, W 6.2-6.6, Ta 6.3-6.7, Al 5.45-5.75, Ti 0.8-1.2, Hf 0.07-0.12, Re 2.8-3.2, balance Ni and being capable of complete primary gamma prime solutioning with alternate heat treatment cycles.
Claim 10
Dependent Claim
102 words
A component for use in a gas turbine engine, cast as a single crystal from an alloy having an incipient melting temperature at least 16°C. (30°F.) above its gamma prime solvus temperature and consisting essentially of the elements Cr 6.4-6.8, Co 9.3-10.0, Mo 0.5-0.7, W 6.2-6.6, Ta 6.3-6.7, Al 5.45-5.75, Ti 0.8-1.2, Hf 0.07-0.12, Re 2.8-3.2, balance Ni, said component after heat treatment at a temperature and for a time period sufficient to solution all its primary gamma prime having the capability of withstanding 248 MPa at 982°C. (36 ksi at 1800°F.) for eighty hours before sustaining a creep of one percent.
Claim 11
Dependent Claim
102 words
A component for use in a gas turbine engine, cast as a single crystal from an alloy having an incipient melting temperature at least 16°C. (30°F.) above its gamma prime solvus temperature and consisting essentially of the elements Cr 6.4-6.8, Co 9.3-10.0, Mo 0.5-0.7, W 6.2-6.6, Ta 6.3-6.7, Al 5.45-5.75, Ti 0.8-1.2, Hf 0.07-0.12, Re 2.8-3.2, balance Ni, said component after heat treatment at a temperature and for a time period sufficient to solution all its primary gamma prime having the capability of withstanding 248 MPa at 982°C. (36 ksi at 1800°F.) for eighty hours before sustaining a creep of one percent.
Claim 12
Dependent Claim
49 words
A component as claimed in Claim 5 or 6 in which the heat treatment includes two hours at 1288°C. (2350°F.) plus two hours at 1293° C . (2360°F.) then slow cooled, then two hours at 1288°C. (2350°F.) plus two hours at 1293°C. (2360°F.) followed by a gas fan quench.
Claim 13
Dependent Claim
32 words
A component as claimed in Claim 5 or 6 in which the heat treatment include four hours at 1288°C. (2350°F.) plus four hours at 1293°C. (2360°F.) followed by a gas fan quench.
Claim 14
Dependent Claim
25 words
A component as described in Claim 7 or 8 in which the component is aged 10 to 30 hours at 871°C. (1600°F.) then air cooled.
Claim 15
Dependent Claim
27 words
A casting as claimed in any one of the preceding claims in which the casting is a gas turbine engine blade or a gas turbine engine vane.
References Cited (Backward Citations)
No citation records indexed.
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