US4585494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta copper base alloy adapted to be formed as a semi-solid metal slurry and a process for making same
Assignee: AEMP Corp
•
Filing: 1985-06-28
•
Granted: 1986-04-29
•
Expires: 2005-06-28
Abstract
Abstract A predominately beta phase copper base alloy which is adapted for forming in a semi-solid slurry condition. The alloy has a microstructure comprising discrete particles within a lower melting point matrix and consists essentially of from about 9% to about 10.5% by weight aluminum, at least about 10% by weight nickel and the balance essentially copper. In accordance with an alternative embodiment the nickel can be replaced on a one for one basis by iron within certain limits. The alloys are processed by chill casting with a cooling rate throughout the section of the casting comprising at least about 10 DEG C./sec. The alloys as-cast or when reheated to a semi-solid exhibit a microstructure suitable for press forging.
Inventors
- 👤 Sankaranarayanan Ashok
- 👤 John F. Breedis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A predominately beta phase copper base alloy adapted for forming in a semi-solid slurry condition, said alloy having a microstructure comprising discrete particles contained in a matrix having a lower melting point than said particles, said alloy consisting essentially of from about 9% to about 10.5% by weight aluminum, at least about 10% by weight nickel and the balance essentially copper.
Claim 2
Dependent Claim
61 words
A predominately beta phase copper base alloy adapted for forming in a semi-solid slurry condition, said alloy having a microstructure comprising discrete particles contained in a matrix having a lower melting point than said particles, said alloy consisting essentially of from about 9% to about 10.5% by weight aluminum, at least about 10% by weight nickel and the balance essentially copper.
Claim 3
Dependent Claim
55 words
An alloy as in clam 1 which is in a chill cast condition wherein said alloy consists essentially of from about 9% to about 10% by weight aluminum, from about 10% to about 12% by weight nickel and the balance essentially copper, said alloy being adapted to form said desired microstructure without stirring during casting.
Claim 4
Dependent Claim
55 words
An alloy as in clam 1 which is in a chill cast condition wherein said alloy consists essentially of from about 9% to about 10% by weight aluminum, from about 10% to about 12% by weight nickel and the balance essentially copper, said alloy being adapted to form said desired microstructure without stirring during casting.
Claim 5
Dependent Claim
13 words
An alloy as in claim 2 which is also in a thixoforged condition.
Claim 6
Dependent Claim
12 words
An alloy as in claim 3 which is in an aged condition.
Claim 7
Dependent Claim
15 words
An alloy as in claim 3 which is in a solution treated and aged condition.
Claim 8
Dependent Claim
25 words
An alloy as in claim 3 wherein said particles comprise a beta phase and wherein said matrix comprises a eutectic having alpha and beta phases.
Claim 9
Dependent Claim
26 words
An alloy as in claim 1 wherein said slurry condition comprises from about 10% to about 30% volume fraction liquid which when solidified comprises said matrix.
Claim 10
Dependent Claim
17 words
An alloy as in claim 1 which comprises a cartridge case comprising an elongated thin walled member.
References Cited (Backward Citations)
US1369818A
Cited
US1496269A
Cited
US1906567A
Cited
US2430419A
Cited
US2778733A
Cited
US2789900A
Cited
US2809889A
Cited
US2798826A
Cited
US2829972A
Cited
US3176410A
Cited
AU249261A
Cited
US3091527A
Cited
US3378413A
Cited
GB1289301A
Cited
GB1328783A
Cited
US3902544A
Cited
GB2042385A
Cited
US4401488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |