US4168967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel and cobalt irregularly shaped granulates
Assignee: Huntington Alloys Corp
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Filing: 1978-07-27
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Granted: 1979-09-25
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Expires: 1998-07-27
Abstract
Abstract A granulate consisting of smooth irregularly shaped granules is produced by preparing a molten bath of nickel and/or cobalt containing amounts of carbon and silicon which are correlated so that:
Inventors
- 👤 Ramamritham Sridhar
- 👤 Warren L. Shellshear
- 👤 Carlos A. Landolt
- 👤 William Kantymir
- 👤 Howard L. Schooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:02
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; C22C1/03; B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A process for producing a granulate comprising preparing a molten bath of alloy containing at least about 95% nickel and/or cobalt, and about 0.1 to 2% of each of the elements carbon and silicon, such that the percentages of carbon and silicon satisfy the relationship: 8.03C-4.42C.sup.2 +7.23Si>3.6 discharging the molten alloy from the bath as a stream having a temperature which is about 50°-100° C. about the liquidus temperature of the alloy, causing the stream to fall onto the surface of a pool of water, inducing agitation of the pool of water and maintaining its temperature at about 30°-60° C.
Claim 2
Dependent Claim
100 words
A process for producing a granulate comprising preparing a molten bath of alloy containing at least about 95% nickel and/or cobalt, and about 0.1 to 2% of each of the elements carbon and silicon, such that the percentages of carbon and silicon satisfy the relationship: 8.03C-4.42C.sup.2 +7.23Si>3.6 discharging the molten alloy from the bath as a stream having a temperature which is about 50°-100° C. about the liquidus temperature of the alloy, causing the stream to fall onto the surface of a pool of water, inducing agitation of the pool of water and maintaining its temperature at about 30°-60° C.
Claim 3
Dependent Claim
43 words
A process as claimed in claim 1 wherein the agitator is induced by injecting a stream of water into the pool at a point below the pool surface and close to the point of impingement of the metal stream with the pool surface.
Claim 4
Dependent Claim
29 words
A process as claimed in claim 2 wherein the flow rates of the metal stream and water stream are correlated so as to maintain the pool at 40°-50° C.
Claim 5
Dependent Claim
46 words
A process as claimed in claim 3 wherein the water stream is at substantially ambient temperature and the correlation of the flow rates is such that the flow rate of the water stream is about 8 to 10 times the flow rate of the metal stream.
Claim 6
Dependent Claim
27 words
A process as claimed in claim 1 wherein the molten alloy contains at least about 97% of nickel and/or cobalt, about 0.4% carbon and about 0.2% silicon.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 5 wherein the metal stream is allowed to fall under gravity through a distance of about 30 to 60 cm before contacting the surface of the pool.
Claim 8
Dependent Claim
69 words
A granulate suitable for adding to a metallurgical melt comprising at least about 95% of nickel and/or cobalt, and about 0.1 to 2% of each of the elements carbon and silicon, such that the percentages of carbon and silicon satisfy the relationship: 8.03C-4.42C.sup.2 +7.23Si>3.6 the granulate consisting of smooth irregularly shaped granules having diameters of at least about 2 mm and a density of at least about 8 g/cc.
Claim 9
Dependent Claim
69 words
A granulate suitable for adding to a metallurgical melt comprising at least about 95% of nickel and/or cobalt, and about 0.1 to 2% of each of the elements carbon and silicon, such that the percentages of carbon and silicon satisfy the relationship: 8.03C-4.42C.sup.2 +7.23Si>3.6 the granulate consisting of smooth irregularly shaped granules having diameters of at least about 2 mm and a density of at least about 8 g/cc.
Claim 10
Dependent Claim
36 words
A granulate as claimed in claim 7 wherein the granules contain at least about 97% of nickel and/or cobalt, about 0.4% carbon and about 0.2% silicon, and have a density of at least about 8.2 g/cc.
Claim 11
Dependent Claim
24 words
A granulate as claimed in claim 7 wherein substantially all of the granules range in size between 3 mm and 25 mm in diameter.
References Cited (Backward Citations)
US3524744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |