US4642146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha copper base alloy adapted to be formed as a semi-solid metal slurry
Assignee: Olin Corp
•
Filing: 1985-10-11
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Granted: 1987-02-10
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Expires: 2005-10-11
Abstract
Abstract A copper base alloy capable of forming a microstructure comprising a plurality of discrete particles in a surrounding metal matrix having a lower melting point than the particles. The alloy consists essentially of from about 3% to about 6% nickel, from about 2% to about 4.25% aluminum, from about 0.25% to about 1.2% silicon, from about 5% to about 15% zinc, up to about 5% iron and the balance essentially copper. When iron is included in an amount from about 3% to about 5% and zinc is restricted to a range of from about 8% to about 10%, the alloy is capable of forming the desired structure in the as-cast condition using a process which does not include stirring during casting.
Inventors
- 👤 Sankaranarayanan Ashok
- 👤 John F. Breedis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:13
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/01; C22C9/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
112 words
A copper base alloy adapted to have a a structure comprising a plurality of discrete particles in a surrounding metal matrix, said particles and said matrix being comprised such that when said alloy is heated to a desired temperature said alloy forms a semi-solid slurry wherein the matrix is in a molten condition comprising from about 5% to about 40% liquid and said particles are within said liquid matrix, said alloy consisting essentially of from about 3% to about 6% nickel, from about 2% to about 4.25% aluminum, from about 0.25% to about 1.2% silicon, from about 5% to about 15% zinc, up to about 5% iron and the balance essentially copper.
Claim 2
Dependent Claim
112 words
A copper base alloy adapted to have a a structure comprising a plurality of discrete particles in a surrounding metal matrix, said particles and said matrix being comprised such that when said alloy is heated to a desired temperature said alloy forms a semi-solid slurry wherein the matrix is in a molten condition comprising from about 5% to about 40% liquid and said particles are within said liquid matrix, said alloy consisting essentially of from about 3% to about 6% nickel, from about 2% to about 4.25% aluminum, from about 0.25% to about 1.2% silicon, from about 5% to about 15% zinc, up to about 5% iron and the balance essentially copper.
Claim 3
Dependent Claim
65 words
A copper base alloy as in claim 1 wherein said aluminum content is from about 2% to about 4%, wherein said zinc content is from about 8% to 10%, wherein said silicon content is from about 0.25% to about 1% and wherein said iron content is from about 3% to about 5%; whereby said alloy is capable of forming said structure upon casting without stirring.
Claim 4
Dependent Claim
54 words
A copper base alloy as in claim 2 wherein the minimum ratio of iron to nickel varies from at least about 0.5 to at least about 0.9 and wherein said ratio is related to a cooling rate during casting of said alloy with the minimum ratio increasing as the cooling rate from casting decreases.
Claim 5
Dependent Claim
22 words
A copper base alloy as in claim 3 wherein said ratio is from at least about 0.6 to at least about 1.
Claim 6
Dependent Claim
23 words
A copper base alloy as in claim 1 having said structure wherein said alloy is in a stir cast condition having said structure.
Claim 7
Dependent Claim
23 words
A copper base alloy as in claim 5 wherein said alloy is in a stir cast and forged from said semi-solid slurry condition.
Claim 8
Dependent Claim
18 words
A copper base alloy as in claim 6 wherein the alloy is further in an aged hardened condition.
Claim 9
Dependent Claim
23 words
A copper base alloy as in claim 1 wherein said matrix at said desired temperature comprises from about 10% to about 30% liquid.
Claim 10
Dependent Claim
20 words
A copper base alloy as in claim 1 wherein said discrete particles comprise degenerate dendrites having a generally spheroidal shape.
Claim 11
Dependent Claim
21 words
A copper base alloy as in claim 2 wherein said alloy is in an as-cast without stirring condition having said structure.
Claim 12
Dependent Claim
19 words
A copper base alloy as in claim 10 wherein said alloy is in a forged from said semi-solid condition.
Claim 13
Dependent Claim
18 words
A copper base alloy as in claim 11 wherein said alloy is further in a precipitation hardened condition.
Claim 14
Dependent Claim
23 words
A copper base alloy as in claim 2 wherein said matrix at said desired temperature comprises from about 10% to about 30% liquid.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |