Patent DE196185C successfully refreshed from Google Patents.
Patent US3890145A successfully refreshed from Google Patents.
US3890145A
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Processes for the manufacture of tungsten-based alloys and in the corresponding materials
Assignee: Office National d'Études et de Recherches Aérospatiales
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Filing: 1970-10-26
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Granted: 1975-06-17
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Expires: 1990-10-26
Abstract
Abstract The process comprises sintering very fine tungsten powder mixed in the cold with a metallic binder occurring in the liquid state at the sintering temperature. This metallic binder is constituted by a very fine powder, of a granulometry of the order of several microns, containing 65 to 90% of nickel, 5 to 20% of chromium and 5 to 15% of phosphorus, the phosphorus being introduced in the form of an alloy powder containing one at least of the two other binder constituents.
Inventors
- 👤 Andre R Hivert
- 👤 Philippe M Galmiche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:13
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/045; F; F42; F42B; F42B12/00; F42B12/72; F42B12/74
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
93 words
PROCESS FOR THE MANUFACTURE OF TUNGSTEN-BASED ALLOYS, COMPRISING FORMING A MIXTURE OF VERY FINE TUNGSTEN POWDER WITH A METALLIC BINDER AND SINTERING SAID MIXTURE IN A NONOXIDIZING, HALOGENATED ATMOSPHERE, SAID BINDER OCURRING IN THE LIQUID STATE AT THE SINTERING TEMPERATURE AND BEING CONSTITUTED BY A VERY FINE POWDER, CONTAINING AS THE ONLY THREE CONSTITUENTS 65 TO 90% OF NICKEL, 5 TO 20% OF CHROMIUM AND 5 TO 15% OF PHOSPHORUS, THE PHOSPHORUS BEING INTRODUCED IN THE FORM OF AN ALLOY POWDER CONTAINING ONE AT LEAST OF THE TWO OTHER CONSTITUENTS OF THE BINDER.
Claim 2
Dependent Claim
93 words
PROCESS FOR THE MANUFACTURE OF TUNGSTEN-BASED ALLOYS, COMPRISING FORMING A MIXTURE OF VERY FINE TUNGSTEN POWDER WITH A METALLIC BINDER AND SINTERING SAID MIXTURE IN A NONOXIDIZING, HALOGENATED ATMOSPHERE, SAID BINDER OCURRING IN THE LIQUID STATE AT THE SINTERING TEMPERATURE AND BEING CONSTITUTED BY A VERY FINE POWDER, CONTAINING AS THE ONLY THREE CONSTITUENTS 65 TO 90% OF NICKEL, 5 TO 20% OF CHROMIUM AND 5 TO 15% OF PHOSPHORUS, THE PHOSPHORUS BEING INTRODUCED IN THE FORM OF AN ALLOY POWDER CONTAINING ONE AT LEAST OF THE TWO OTHER CONSTITUENTS OF THE BINDER.
Claim 3
Dependent Claim
42 words
Process according to claim 1, wherein said alloy powder contains also said two other constituents, the binder then being in the form of a nickel-based ternary alloy of the nickel-chromium-phosphorus type whose constituents are within the above-indicated ranges of percentage by weight.
Claim 4
Dependent Claim
31 words
Process according to claim 1, wherein the proportion by weight of the binder, in the mixture formed by the tungsten powder supplemented with said binder, is comprised between 5 and 20%.
Claim 5
Dependent Claim
32 words
Process according to claim 3, wherein the proportion by weight of the binder in the mixture formed by the tungsten powder supplemented with the said binder, is comprised between 10 and 15%.
Claim 6
Dependent Claim
39 words
Process according to claim 1, wherein said sintering is conducted in a halogenated-hydrogenated atmosphere at a temperature which is a function of the exact composition of the final alloy and above the fusion temperature of the metallic binder used.
Claim 7
Dependent Claim
15 words
Process according to claim 5, wherein said sintering temperature is between 800* and 1150* C.
Claim 8
Dependent Claim
75 words
Process according to claim 1, comprising first forming a mixture of the powders, inTroducing the tungsten and the constituents of the metallic binder, then cold shaping the mixture by compression in the presence of an easily removable conventional agglomerant, then removing said agglomerant by heating at a temperature at least equal to the temperature of volatisisation of said agglomerant but well below the fusion temperature of the metallic binder, and lastly carrying out the sintering.
Claim 9
Dependent Claim
10 words
Process according to claim 7, wherein said agglomerant is camphor.
Claim 10
Dependent Claim
33 words
Process according to claim 1, comprising adding to the mixture, in a proportion at least equal to 5%, a hard metallic carbide having a heat of formation higher than that of tungsten carbide.
Claim 11
Dependent Claim
12 words
Process according to claim 9, wherein said hard carbide is titanium carbide.
Claim 12
Dependent Claim
12 words
Process according to claim 9, wherein said hard carbide is zirconium carbide.
Claim 13
Dependent Claim
12 words
Process according to claim 9, wherein said hard carbide is tantalum carbide.
Claim 14
Dependent Claim
54 words
A material constituted by a sintered mixture of fine tungsten particles and a metallic binder, said binder consisting of 65 to 90% nickel, 5 to 20% chromium and 5 to 15% phosphorus, the density of said material being between 14 and 16.5 and the hardness of said material being between 40 and 45 Rc.
Claim 15
Dependent Claim
54 words
A material constituted by a sintered mixture of fine tungsten particles and a metallic binder, said binder consisting of 65 to 90% nickel, 5 to 20% chromium and 5 to 15% phosphorus, the density of said material being between 14 and 16.5 and the hardness of said material being between 40 and 45 Rc.
Claim 16
Dependent Claim
62 words
A material constituted by a sintered mixture of fine tungsten particles, at least 5% by weight of tantalum carbide and a metallic binder, said binder consisting of 65 to 90% nickel, 5 to 20% chromium, and 5 to 15% phosphorus, the density of said material being between 14 and 16.5 and the hardness of said material being between 40 and 60 Rc.
Claim 17
Dependent Claim
62 words
A material constituted by a sintered mixture of fine tungsten particles, at least 5% by weight of tantalum carbide and a metallic binder, said binder consisting of 65 to 90% nickel, 5 to 20% chromium, and 5 to 15% phosphorus, the density of said material being between 14 and 16.5 and the hardness of said material being between 40 and 60 Rc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |