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US4818283A
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Dispersion hardened copper alloys and production process therefore
Assignee: Battelle-Institut
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Filing: 1987-10-16
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Granted: 1989-04-04
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Expires: 2007-10-16
Abstract
Abstract A process for producing a dispersion hardened copper alloy includes admixing to a copper melt from 0.3 to 15 weight % of molybdenum to provide a mixture which is a melt; superheating the mixture to a temperature ranging from about 200° C. to about 1000° C. above the melting point of coper to provide a superheated melt; and subjecting the superheated melt to very rapid solidification at a cooling rate ranging from 104° to 106° C./sec. The above process produces dipsersion hardened copper alloy comprising copper and from 1 to 15 weight % of molybdenum which is present in the dispersion hardened copper alloy as particles having a diameter of less than 0.1 μm embedded in the copper matrix. Such dispersion hardened copper alloys are useful for providing electrical conductors which are subjected to elevated temperatures, such as for providing spot welding electrodes, particularly for welding of zinc-galvanized sheet metal. Such alloys do not become brittle when heated up to around about 500° C. or even up to around about 800° C.
Inventors
- 👤 Karl-Heinz Grunthaler
- 👤 Dieter Langbein
- 👤 Fehmi Nilmen
- 👤 Heinrich Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:24
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; C; C22; C22C; C22C9/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
78 words
A process for producing a dispersion hardened copper alloy, comprising: admixing to a copper melt from 3.0 to 15 weight % of molybdenum to provide a mixture which is a melt; superheating the mixture to a temperature ranging from about 200° C. to about 1000° C. above the melting point of copper to provide a superheated melt; and subjecting the superheated melt to very rapid solidification at a cooling rate ranging from 10 4 to 10 6 °C./sec.
Claim 2
Dependent Claim
78 words
A process for producing a dispersion hardened copper alloy, comprising: admixing to a copper melt from 3.0 to 15 weight % of molybdenum to provide a mixture which is a melt; superheating the mixture to a temperature ranging from about 200° C. to about 1000° C. above the melting point of copper to provide a superheated melt; and subjecting the superheated melt to very rapid solidification at a cooling rate ranging from 10 4 to 10 6 °C./sec.
Claim 3
Dependent Claim
27 words
The process according to claim 1, wherein the very rapid solidification of the superheated melt is accomplished by atomizing the superheated melt to form granulates or powders.
Claim 4
Dependent Claim
15 words
The process according to claim 2, wherein atomizing is effected by utilizing an inert gas.
Claim 5
Dependent Claim
17 words
The process according to claim 3, wherein the inert gas is selected from among argon and helium.
Claim 6
Dependent Claim
19 words
The process according to claim 3, wherein the inert gas contains from a trace amount up to 5% hydrogen.
Claim 7
Dependent Claim
24 words
The process according to claim 2, comprising the further steps of compacting the granulates or powders into extrusion rods and extrusion of said rods.
Claim 8
Dependent Claim
28 words
The process according to claim 1, wherein the very rapid solidification of the superheated melt is accomplished by melting away and granulating pressed powder bodies to form granulates.
Claim 9
Dependent Claim
19 words
The process according to claim 7, wherein the melting away and granulating is accomplished by a rotating electrode means.
Claim 10
Dependent Claim
22 words
The process according to claim 7, comprising the further steps of compacting the granulates into extrusion rods and extrusion of said rods.
Claim 11
Dependent Claim
21 words
The process according to claim 1, wherein the very rapid solidification is accomplished by directly processing the superheated melt into bands.
Claim 12
Dependent Claim
21 words
The process according to claim 10, wherein directly processing the superheated melt into bands is accomplished by a melt spinning means.
Claim 13
Dependent Claim
40 words
The process according to claim 1, wherein the superheated melt is solidified in the form of granulates or powders and the process comprises the further steps of compacting the granulates or powders into extrusion rods and extrusion of said rods.
Claim 14
Dependent Claim
22 words
The process according to claim 1, wherein molybdenum for admixing to the copper melt is in the form of a fine powder.
Claim 15
Dependent Claim
20 words
The process according to claim 13, wherein the fine powder has a particle size ranging from 1 to 20 μm.
Claim 16
Dependent Claim
20 words
The process according to claim 14, wherein the fine powder has a particle size ranging from 3 to 15 μm.
Claim 17
Dependent Claim
31 words
The process according to claim 1, wherein molybdenum for admixing to the copper melt has the form of pressed bodies comprised of a mixture of fine powders of copper and molybdenum.
Claim 18
Dependent Claim
20 words
The process according to claim 16, wherein the fine powders have a particle size ranging from 1 to 20 μm.
Claim 19
Dependent Claim
20 words
The process according to claim 17, wherein the fine powders have a particle size ranging from 3 to 15 μm.
Claim 20
Dependent Claim
40 words
The process according to claim 1, comprising the further step of deoxidizing the copper melt, prior to admixing the molybdenum, by admixing to the copper melt of a readily oxidized metal in an amount effective to deoxidize the copper melt.
Claim 21
Dependent Claim
13 words
The process according to claim 19, wherein the readily oxidized metal is aluminium.
Claim 22
Dependent Claim
117 words
A dispersion hardened copper alloy comprising copper and from 1 to 15 weight % molybdenum, which at least one metal is present in the dispersion hardened copper alloy as particles having a diameter of less than 0.1 μm embedded in the copper matrix and produced by a process comprising: admixing to a copper melt from 3.0 to 15 weight % of molybdenum to provide a mixture which is a melt; superheating the mixture to a temperature ranging from about 200° C. to about 1000° C. above the melting point of copper to provide a superheated melt; and subjecting the superheated melt to very rapid solidification at a cooling rate ranging from 10 4 to 10 6 °C./sec.
Claim 23
Dependent Claim
117 words
A dispersion hardened copper alloy comprising copper and from 1 to 15 weight % molybdenum, which at least one metal is present in the dispersion hardened copper alloy as particles having a diameter of less than 0.1 μm embedded in the copper matrix and produced by a process comprising: admixing to a copper melt from 3.0 to 15 weight % of molybdenum to provide a mixture which is a melt; superheating the mixture to a temperature ranging from about 200° C. to about 1000° C. above the melting point of copper to provide a superheated melt; and subjecting the superheated melt to very rapid solidification at a cooling rate ranging from 10 4 to 10 6 °C./sec.
Claim 24
Dependent Claim
15 words
A spot welding electrode comprised of a composition produced by the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |