Patent US3918964A successfully refreshed from Google Patents.
US3918964A
Expired / Lapsed
US
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Nickel-base alloys having a low coefficient of thermal expansion
Assignee: Sorcery Metals Inc
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Filing: 1973-12-21
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Granted: 1975-11-11
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Expires: 1993-12-21
Abstract
Abstract Alloy compositions consisting predominantly of nickel, chromium, molybdenum, carbon, and boron are disclosed. The alloys possess a duplex structure consisting of a nickel-chromium-molybdenum matrix and a semi-continuous network of refractory carbides and borides. A combination of desirable properties is provided by these alloys, including elevated temperature strength, resistance to oxidation and hot corrosion, and a very low coefficient of thermal expansion.
Inventors
- 👤 James French Baldwin
- 👤 Douglas H Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:42
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/052; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/304
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
34 words
A NICKLE BASE ALLOY HAVING ELEVATED TEMPERATURE STRENGTH, RESISTANCE TO OXIDATION AND HOT CORROSION, AND A LOW COEFFICIENT OF THERMAL EXPANSION CONSISTING ESSENTIALLY OF THE FOLLOWING ELEMENTS IN THE WEIGHT PERCENT RANGES SET FORTH:
Claim 2
Dependent Claim
34 words
A NICKLE BASE ALLOY HAVING ELEVATED TEMPERATURE STRENGTH, RESISTANCE TO OXIDATION AND HOT CORROSION, AND A LOW COEFFICIENT OF THERMAL EXPANSION CONSISTING ESSENTIALLY OF THE FOLLOWING ELEMENTS IN THE WEIGHT PERCENT RANGES SET FORTH:
Claim 3
Dependent Claim
20 words
The nickel base alloy of claim 1 wherein the carbon content is about 0.5 to about 1.2 percent by weight.
Claim 4
Dependent Claim
16 words
A component for use in a gas turbine engine formed of the alloy of claim 1.
Claim 5
Dependent Claim
12 words
A hard facing welding rod formed of the alloy of claim 1.
Claim 6
Dependent Claim
24 words
The alloy of claim 1 which contains, on a weight basis, about 28 to about 42% chromium, and about 12 to about 20% molybdenum.
Claim 7
Dependent Claim
25 words
The alloy of claim 5 which contains, on a weight basis, about 16 to about 20 percent molybdenum and about 0.2% to about 0.7% boron.
Claim 8
Dependent Claim
16 words
A component for use in a gas turbine engine formed of the alloy of claim 5.
Claim 9
Dependent Claim
16 words
A component for use in a gas turbine engine formed of the alloy of claim 6.
Claim 10
Dependent Claim
12 words
A hard facing welding rod formed of the alloy of claim 5.
Claim 11
Dependent Claim
34 words
A nickel base alloy having elevated temperature strength, resistance to oxidation and hot corrosion, and a low coefficient of thermal expansion consisting essentially of the following elements and the weight percentage ranges set forth:
Claim 12
Dependent Claim
34 words
A nickel base alloy having elevated temperature strength, resistance to oxidation and hot corrosion, and a low coefficient of thermal expansion consisting essentially of the following elements and the weight percentage ranges set forth:
Claim 13
Dependent Claim
16 words
A component for use in a gas turbine engine formed of the alloy of claim 10.
Claim 14
Dependent Claim
34 words
A nickel bAse alloy having elevated temperature strength, resistance to oxidation and hot corrosion, and a low coefficient of thermal expansion consisting essentially of the following elements in the weight percentage ranges set forth:
Claim 15
Dependent Claim
34 words
A nickel bAse alloy having elevated temperature strength, resistance to oxidation and hot corrosion, and a low coefficient of thermal expansion consisting essentially of the following elements in the weight percentage ranges set forth:
Claim 16
Dependent Claim
16 words
A component for use in a gas turbine engine formed of the alloy of claim 12.
Claim 17
Dependent Claim
12 words
The alloy of claim 1 which contains not more than 0.2% titanium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |