US4395464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper base alloys made using rapidly solidified powders and method
Assignee: Marko Materials Inc
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Filing: 1981-04-01
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Granted: 1983-07-26
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Expires: 2001-04-01
Abstract
Abstract New copper-rich metal alloys containing nickel along with certain specific amounts of boron are disclosed. The alloys are subjected to a rapid solidification processing (RSP) technique which produces cooling rates between ˜10 5 ° to 10 7 ° C./sec. The asquenched ribbon, powder, etc. consists primarily of a metastable crystalline solid solution phase. The metastable crystalline phases are subjected to suitable heat treatments so as to produce a transformation to a stable multiphase microstructure, which includes borides. This heat treated alloy exhibits superior mechanical properties with good corrosion and/or oxidation resistance for numerous engineering applications.
Inventors
- 👤 Viswanathan Panchanathan
- 👤 Ranjan Ray
- 👤 Bill C. Giessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:25
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
199 words
Fine grained Copper-Nickel alloys containing borides in bulk form having composition Cu a Ni b Al c Cr d M e B f , wherein Cu, Ni, Al, Cr, and B are copper, nickel, aluminum, chromium and boron respectively, and M represents one or more of iron (Fe), cobalt (Co), vanadium (V), and manganese Mn) and wherein a, b, c, d, e and f represent weight percent of Cu, Ni, Al, Cr, M and B respectively and having the following values: a=40-87, b=10.5-44, c=0-10, d=0-18, e=0-8, f=1.5-4 wherein the maximum value of b+c+d+e may not exceed 56, the maximum value of c+d may not exceed 22.5 and the sum of a+b+c+d+e+f=100, made by subjecting the powders of the said alloy by application of pressure and heat, said powders being made by the method comprising the following steps: (a) forming a melt of said alloy (b) depositing said melt against a rapidly moving quench surface adapted to quench said melt at a rate in the range of approximately 10 5 to 10 7 ° C./second and form thereby a rapidly solidified brittle strip of said alloys characterized by predominantly a single solid solution structure, (c) comminuting said strip into powders.
Claim 2
Dependent Claim
199 words
Fine grained Copper-Nickel alloys containing borides in bulk form having composition Cu a Ni b Al c Cr d M e B f , wherein Cu, Ni, Al, Cr, and B are copper, nickel, aluminum, chromium and boron respectively, and M represents one or more of iron (Fe), cobalt (Co), vanadium (V), and manganese Mn) and wherein a, b, c, d, e and f represent weight percent of Cu, Ni, Al, Cr, M and B respectively and having the following values: a=40-87, b=10.5-44, c=0-10, d=0-18, e=0-8, f=1.5-4 wherein the maximum value of b+c+d+e may not exceed 56, the maximum value of c+d may not exceed 22.5 and the sum of a+b+c+d+e+f=100, made by subjecting the powders of the said alloy by application of pressure and heat, said powders being made by the method comprising the following steps: (a) forming a melt of said alloy (b) depositing said melt against a rapidly moving quench surface adapted to quench said melt at a rate in the range of approximately 10 5 to 10 7 ° C./second and form thereby a rapidly solidified brittle strip of said alloys characterized by predominantly a single solid solution structure, (c) comminuting said strip into powders.
Claim 3
Dependent Claim
23 words
An alloy of claim 1 having the composition Cu 52 .5-83.5 Ni 15-44 B 1 .5-3.5 wherein the subscripts are in weight percent.
Claim 4
Dependent Claim
26 words
An alloy of claim 1 having the composition Cu 64 .5-86.6 Ni 10 .5-24 Al 1-8 .2 B 1 .9-3.3, wherein subscripts are in weight percent.
Claim 5
Dependent Claim
38 words
An alloy of claim 1 having composition Cu 65-85 Ni 12 .5-24 Cr 4 .5-18 B 1 .5-4 wherein subscripts are in weight percent and the sum of weight percent of Cu, Ni, Cr and B is 100.
Claim 6
Dependent Claim
43 words
An alloy of claim 1 having the composition Cu 65-87 Ni 10 .5-24 Al 0 .5-7.5 Cr 4 .5-15 B 1 .6-3.6 wherein subscripts are in weight percent and the sum of weight percent of Cu, Ni, Al, Cr, and B is 100.
References Cited (Backward Citations)
US3293029A
Cited
JPS54112324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |