US3890816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elimination of carbide segregation to prior particle boundaries
Assignee: General Electric Co
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Filing: 1973-09-26
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Granted: 1975-06-24
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Expires: 1993-09-26
Abstract
Abstract Carbide segregation to the prior boundaries of particles used in powder metallurgy to generate an article is eliminated through the use of a nickel-base alloy powder which coordinates carbon with the amount of Mo and W which can form detrimental amounts of undesirable carbides and with Cb, Ta, Hf and Zr which are strong formers of a desirable MC-type carbide.
Inventors
- 👤 Robert E Allen
- 👤 Jon L Bartos
- 👤 Peter Aldred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:20
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0052
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
A NICKEL-BASE ALLOY POWDER, SIZED FOR USE IN MAKING AN ARTICLE BY POWDER METALLURGICAL TECHNIQUES, CONSISTING ESSENTIALLY OF: 0.03 TO LESS THAN 0.3 WT. % C; UP TO 16 WT. % TOTAL OF ELEMENTS SELECTED FROM THE GROUP CONSISTING OF AL AND TI; ABOUT 4-30 WT. % CR; UP TO ABOUT 3.6 AT. % OF ELEMENTS SELECTED FROM THE GROUP CONSISTING OF MO AND W; AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF CB, TA, HF AND ZR, THE CB WHEN SELECTED BEING UP TO ABOUT 10 WT. %, THE TA WHEN SELECTED BEING UP TO ABOUT 10 WT. %, THE HF WHEN SELECTED BEING UP TO ABOUT 8 WT. %, AND THE ZR WHEN SELECTED BEING UP TO ABOUT 1 WT. %, THE SUM OF SELECTED ELEMENTS BEING AT LEAST ABOUT 0.3 AT. %; UP TO ABOUT 5 WT. % V; UP TO ABOUT 1 WT. % B; UP TO ABOUT 30 WT. % CO; WITH THE BALANCE ESSENTIALLY NI AND INCIDENTAL IMPURITIES; THE ALLOY BEING CHARACTERIZED BY THE SUBSTANTIAL ABSENCE OF M23C6 CARBIDE, THE BALANCE OF THE CARBIDE BEING PREDOMINANTLY MC-TYPE.
Claim 2
Dependent Claim
185 words
A NICKEL-BASE ALLOY POWDER, SIZED FOR USE IN MAKING AN ARTICLE BY POWDER METALLURGICAL TECHNIQUES, CONSISTING ESSENTIALLY OF: 0.03 TO LESS THAN 0.3 WT. % C; UP TO 16 WT. % TOTAL OF ELEMENTS SELECTED FROM THE GROUP CONSISTING OF AL AND TI; ABOUT 4-30 WT. % CR; UP TO ABOUT 3.6 AT. % OF ELEMENTS SELECTED FROM THE GROUP CONSISTING OF MO AND W; AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF CB, TA, HF AND ZR, THE CB WHEN SELECTED BEING UP TO ABOUT 10 WT. %, THE TA WHEN SELECTED BEING UP TO ABOUT 10 WT. %, THE HF WHEN SELECTED BEING UP TO ABOUT 8 WT. %, AND THE ZR WHEN SELECTED BEING UP TO ABOUT 1 WT. %, THE SUM OF SELECTED ELEMENTS BEING AT LEAST ABOUT 0.3 AT. %; UP TO ABOUT 5 WT. % V; UP TO ABOUT 1 WT. % B; UP TO ABOUT 30 WT. % CO; WITH THE BALANCE ESSENTIALLY NI AND INCIDENTAL IMPURITIES; THE ALLOY BEING CHARACTERIZED BY THE SUBSTANTIAL ABSENCE OF M23C6 CARBIDE, THE BALANCE OF THE CARBIDE BEING PREDOMINANTLY MC-TYPE.
Claim 3
Dependent Claim
51 words
The alloy powder of claim 1 in which Al is 3-8 wt. %; Ti is 2-8 wt. %; Mo, when selected, is up to about 6 wt. %; and W, when selected, is up to about 12 wt. %; the carbides being predominantly in the size range of about 0.2-1 micron.
Claim 4
Dependent Claim
65 words
The alloy powder of claim 2 consisting essentially of, by weight, 3-7% Al; 2-6% Ti; 4-17% Cr; 0.05-0.2% C; Mo, when selected, up to 6%; W, when selected, up to 9%; up to 6% Ta; up to 4% Cb; up to 5% Hf; up to 3% V; up to 0.1% Zr; up to 0.1% B; 5-20% Co with the balance essentially Ni and incidental impurities.
Claim 5
Dependent Claim
35 words
The alloy powder of claim 3 in which the W, when selected, is up to 7%, the V is up to 1.5%; the Zr is 0.1-0.1%; the B is 0.01-0.1% and the Co is 6-16%.
Claim 6
Dependent Claim
48 words
The alloy powder of claim 4 in which Al is 3-5%; Ti is 3.5-5.5%; Cr is 7-11%; C is 0.15-0.2%, Mo is 2-3%; W is 5-7%; Ta is up to 4%; Cb is up to 2.5%; Hf is up to 2%; B is 0.01-0.05% and Co is 10-16%.
References Cited (Backward Citations)
US3681061A
Cited
US3649257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |