US4111685A
Expired / Lapsed
US
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Dispersion-strengthened cobalt-bearing metal
Assignee: ALLEGHENY INTERNATIONAL ACCEPTANCE Corp
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Filing: 1976-11-04
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Granted: 1978-09-05
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Expires: 1996-11-04
Abstract
Abstract Oxide dispersion-strengthened metal having from 18 to 35% chromium, 3 to 7% aluminum, 0.2 to 3.0% of an oxide dispersoid, 10 to 45% nickel and at least 30% cobalt. The oxide dispersoid has a negative free energy of formation at 1000° C of at least as great as that of aluminum oxide.
Inventors
- 👤 Sanford Baranow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:13
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
Coarse grained oxide dispersion-strengthened metal consisting essentially of, by weight, from 18 to 35% chromium, 3 to 7% aluminum, 0.2 to 3.0% of at least one oxide dispersoid, 10 to 45% nickel, up to 10% iron, up to 0.1% boron, up to 2.0% titanium, up to 1.5% hafnium, up to 3.0% vanadium, up to 4.0% of elements from the group consisting of molybdenum, tungsten and rhenium, up to 4.0% tantalum, up to 1.0% yttrium, up to 1.0% lanthanum, up to 1.0% cerium, up to 0.1% carbon, balance essentially cobalt; said oxide dispersoid having a negative free energy of formation at 1000° C. of at least as great as that of aluminum oxide; said metal having at least 30% cobalt; said metal being characterized by a desirable combination of high temperature strength and oxidation resistance, and hot corrosion resistance.
Claim 2
Dependent Claim
138 words
Coarse grained oxide dispersion-strengthened metal consisting essentially of, by weight, from 18 to 35% chromium, 3 to 7% aluminum, 0.2 to 3.0% of at least one oxide dispersoid, 10 to 45% nickel, up to 10% iron, up to 0.1% boron, up to 2.0% titanium, up to 1.5% hafnium, up to 3.0% vanadium, up to 4.0% of elements from the group consisting of molybdenum, tungsten and rhenium, up to 4.0% tantalum, up to 1.0% yttrium, up to 1.0% lanthanum, up to 1.0% cerium, up to 0.1% carbon, balance essentially cobalt; said oxide dispersoid having a negative free energy of formation at 1000° C. of at least as great as that of aluminum oxide; said metal having at least 30% cobalt; said metal being characterized by a desirable combination of high temperature strength and oxidation resistance, and hot corrosion resistance.
Claim 3
Dependent Claim
13 words
Oxide dispersion-strengthened metal according to claim 1, having from 20 to 28% chromium.
Claim 4
Dependent Claim
13 words
Oxide dispersion-strengthened metal according to claim 1, having from 3.5 to 6.5% aluminum.
Claim 5
Dependent Claim
13 words
Oxide dispersion-strengthened metal according to claim 1, having from 15 to 35% nickel.
Claim 6
Dependent Claim
18 words
Oxide dispersion-strengthened metal according to claim 1, having from 0.5 to 2.0% of at least one oxide dispersoid.
Claim 7
Dependent Claim
12 words
Oxide dispersion-strengthened metal according to claim 1, having at least 40% cobalt.
Claim 8
Dependent Claim
20 words
Oxide dispersion-strengthened metal according to claim 1, characterized by coarse grains and (001) planes perpendicular to the direction of working.
Claim 9
Dependent Claim
32 words
Oxide dispersion-strengthened metal according to claim 7, having from 20 to 28% chromium, 3.5 to 6.5% aluminum, 15 to 35% nickel and from 0.5 to 2.0% of at least one oxide dispersoid.
Claim 10
Dependent Claim
12 words
Oxide dispersion-strengthened metal according to claim 8, having at least 40% cobalt.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |