US4004891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superalloys containing nitrides and process for producing same
Assignee: GTE Sylvania Inc
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Filing: 1975-02-05
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Granted: 1977-01-25
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Expires: 1995-02-05
Abstract
Abstract Superalloys containing uniform dispersions of at least 0.1 volume percent of a metal nitride improve qualities of superalloys. These superalloys are produced from superalloy powders by a nitridng process utilizing a controlled atmosphere for controlled times at controlled temperature. A nitriding temperature of at least 700 DEG C is required in order to produce effective amounts of nitride in practical lengths of time.
Inventors
- 👤 Ching San Lin
- 👤 James Thomas Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0068; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A superalloy composition resulting from a process wherein a first superalloy composition having a predetermined atomic ratio of metallic elements, containing from about 50 to about 75 weight percent of nickel, and having a second metal selected from the group consisting of titanium, aluminum, zirconium, and additional metallic materials alloyed with said nickel, is converted to a second superalloy composition by nitriding said second metal to form a dispersion of a metal nitride selected from the group consisting of titanium nitride, aluminum nitride, zirconium nitride, and mixtures thereof; and said second superalloy having the same atomic ratio of metals as said on first superalloy composition when said metal nitride is calculated on the basis of the metallic content thereof.
Claim 2
Dependent Claim
119 words
A superalloy composition resulting from a process wherein a first superalloy composition having a predetermined atomic ratio of metallic elements, containing from about 50 to about 75 weight percent of nickel, and having a second metal selected from the group consisting of titanium, aluminum, zirconium, and additional metallic materials alloyed with said nickel, is converted to a second superalloy composition by nitriding said second metal to form a dispersion of a metal nitride selected from the group consisting of titanium nitride, aluminum nitride, zirconium nitride, and mixtures thereof; and said second superalloy having the same atomic ratio of metals as said on first superalloy composition when said metal nitride is calculated on the basis of the metallic content thereof.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |