US4677035A
Expired / Lapsed
US
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High strength nickel base single crystal alloys
Assignee: Honeywell International Inc
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Filing: 1984-12-06
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Granted: 1987-06-30
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Expires: 2004-12-06
Abstract
Abstract Disclosed are novel nickel-base single crystal alloy compositions consisting essentially of, by weight, about 8.0-14.0% chromium, 1.5-6.0% cobalt, 0.5-2.0% molybdenum, 3.0-10.0% tungsten, 2.5-7.0% titanium, 2.5-7.0% aluminum, 3.0-6.0% tantalum and the balance nickel. A combination of thermal treatment and coating of the novel alloys to enhance their mechanical properties is also disclosed.
Inventors
- 👤 Louis J. Fiedler
- 👤 Subhash K. Naik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
C; C30; C30B; C30B11/00; C30B29/00; C30B29/10; C30B29/52; C30B33/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12931; Y10T428/12944
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A single crystal alloy composition consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; and the balance nickel.
Claim 2
Dependent Claim
56 words
A single crystal alloy composition consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; and the balance nickel.
Claim 3
Dependent Claim
56 words
The composition of claim 1 consisting essentially of, by weight, about 9.0% to about 12.0% chromium; about 2.5% to about 5.0% cobalt; about 0.8% to about 1.5% molybdenum; about 4.0% to about 8.0% tungsten; about 2.5% to about 5.0% titanium; about 3.0% to about 6.0% aluminum; about 4.0% to about 5.0% tantalum; and the balance nickel.
Claim 4
Independent Claim
156 words
A method for producing a heat-treated single crystal alloy material comprising: (a) providing a composition consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; and the balance nickel. (b) melting and directionally solidifying the composition to produce a single crystal alloy; (c) heat treating the material at a temperature of between about 2340° F. and about 2400° F. for about 1 to about 4 hours; (d) rapidly cooling the material at a rate of about 150° F. to about 250° F. per minute for at least about 6 minutes; and (e) reheating the material to between about 1400° F. and about 2050° F. and holding the material within this temperature range from about 2 to about 24 hours.
Claim 5
Independent Claim
156 words
A method for producing a heat-treated single crystal alloy material comprising: (a) providing a composition consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; and the balance nickel. (b) melting and directionally solidifying the composition to produce a single crystal alloy; (c) heat treating the material at a temperature of between about 2340° F. and about 2400° F. for about 1 to about 4 hours; (d) rapidly cooling the material at a rate of about 150° F. to about 250° F. per minute for at least about 6 minutes; and (e) reheating the material to between about 1400° F. and about 2050° F. and holding the material within this temperature range from about 2 to about 24 hours.
Claim 6
Dependent Claim
59 words
The method of claim 3 wherein said composition consists essentially of, by weight, about 9.0% to about 12.0% chromium; about 2.5% to about 5.0% cobalt; about 0.8% to about 1.5% molybdenum; about 4.0% to about 8.0% tungsten; about 2.5% to about 5.0% titanium; about 3.0% to about 6.0% aluminum; about 4.0% to about 5.0% tantalum; and the balance nickel.
Claim 7
Dependent Claim
34 words
An article of manufacture comprising a substrate material fabricated from the composition of claim 1, the substrate being coated with a layer of an aluminide deposit to impart improved high temperature oxidation/corrosion resistance thereto.
Claim 8
Dependent Claim
31 words
The article of claim 5 wherein the aluminide deposit is prepared from a NiAl alloy which contains from about 25 to about 40 percent by weight aluminum, the balance being nickel.
Claim 9
Dependent Claim
120 words
An article of manufacture comprising a substrate material fabricated from the composition of claim 1, the substrate being coated with an overlay coating to impart improved high temperature oxidation/corrosion resistance thereto, the overlay coating composition having the general formula MCrAlY wherein M is a solid solution of metal selected from the group consisting of nickel, cobalt, and mixtures of nickel and cobalt with molybdenum wherein the metals represented by M comprise 30 to 75 percent by weight of the coating, chromium comprises about 10 to about 40 percent by weight of the coating; aluminum comprises about 5 to about 20 percent by weight of the coating and yttrium comprises about 0.1 to about 1.0 percent by weight of the coating.
References Cited (Backward Citations)
US4459160A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
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