CN102041366A - Direct aging method for preparing high-strength high-conductivity Cu-Ni-Al conductor material - Google Patents
Direct aging method for preparing high-strength high-conductivity Cu-Ni-Al conductor material Download PDFInfo
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Abstract
The invention discloses a method for preparing a high-strength high-conductivity Cu-Ni-Al conductor material. By taking Cu-0.4 percent (mass percent, the same below) Ni-0.4 percent Al for example, an alloy raw material is smelted and poured into a water-cooled copper mold, is directly subjected to cold rolling to produce certain deformation, and is aged at the temperature of between 200 and 600 DEG C for 0.1 to 10 hours. The strength of the Cu-Ni-Al alloy is 450 to 900MPa, and the conductivity is 70 to 90 percent international annealed copper standard (IACS). The method is short in production flow, simple in process and suitable for large-scale industrial production. Meanwhile, the prepared alloy has a wide performance range, can achieve various strengths and conductivities by adjusting an aging process, and meets the actual requirements of application in various aspects.
Description
Technical field
The invention belongs to Cu alloy field, relate to the production method that preparation has the Cu-Ni-Al conductor material of high-strength highly-conductive characteristic.
Background technology
High-speed railway is the project of giving priority to of China's 12 planning, and it is the growth of blowout to bullet train and the required special-purpose copper material of the high-performance demand contour, smart, sharp product of railway electrification.Yet the osculatory as one of power supply grid key part also relies on external import in a large number, does not also form independently independent intellectual property right and relevant throughput at home.Operation for guaranteeing that high-speed railway is stable, economic requires osculatory to possess high conductivity and high-intensity feature simultaneously.Many high-strength highly-conductive alloy materials are developed gradually, and wherein the Cu-Cr-Zr alloy receives much concern with its excellent comprehensive performance.Cu-Cr-Zr is the most typical precipitation strength type alloy, and it is to add a spot of Zr element in Cu-Cr, makes to produce Cr simultaneously mutually and Cu3Zr two kinds of precipitated phases mutually in precipitation process, obstruction dislocation motion raising alloy strength.Simultaneously Cr and Cu3Zr separating out mutually purified the Cu matrix, makes alloy possess the high-intensity higher specific conductivity that obtains simultaneously.
The common preparation technology of Cu-Cr-Zr alloy is cast into ingot casting for induction melting, carries out ageing treatment to after the ingot casting high temperature solid solution, carries out the sample that cold deformation acquisition to a certain degree has the high-strength highly-conductive performance then.This high temperature solid solution process energy consumption is big, the long actual production that is unfavorable for this alloy of cycle.Because the Zr element is very active and its density is little, fusing point is high, very easily scaling loss in fusion process makes that the actual Zr content of alloy is on the low side and is difficult to control, causes alloy property to descend and is difficult to scale operation simultaneously.
Though therefore the Cu-Cr-Zr alloy shows high-strength highly-conductive characteristic preferably, but still is difficult to large-scale application.The necessary problem that faces at the high-strength highly-conductive material is developed a kind of that have a high-strength highly-conductive characteristic and be easy to conductor material and a kind of simple production technique that melting is produced.
Summary of the invention
The present invention is directed to the problem that aforementioned high-strength highly-conductive material exists, a kind of technology for preparing high-strength highly-conductive Cu-Ni-Al alloy is provided.
The present invention realizes as follows: Cu, Al are placed vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1000 ℃, in stove, fill Ar to 60kPa, add Ni and fusing again, direct cold rolling is carried out 200～600 ℃ of ageing treatment 0.2～10h afterwards to certain deflection after induction stirring is evenly cast.
The present invention has saved the required solution treatment of conventional preparation Cu-Cr-Zr alloy, only needs that ingot casting is carried out directly carrying out timeliness after certain deformation extent cold rolling and can obtain the high-strength highly-conductive performance.The problems such as oxidation burning of alloy have been simplified work flow when having avoided high temperature solid solution thermal treatment, reduce production costs.
The present invention need not to adopt traditional high temperature solid solution to handle, and also can realize separating out of second phase.Why also can obtain the high-strength highly-conductive performance by direct aging is because the cold roller and deformed a large amount of lattice defects such as dislocation of the inner generation of alloy that make, these lattice defects are separated out the nucleation site that provides favourable mutually for second, make second to need not mutually also can directly separate out by solid solution.Simultaneously, in the melting casting faster speed of cooling make a part of alloying element have little time to separate out and be solid-solubilized in the Cu matrix that resulting as cast condition Cu itself just is in hypersaturated state mutually, the timeliness that also helps the later stage is separated out.
Why the present invention is chosen in the Cu matrix is added Ni and Al element not only because Ni and Al element reserves are abundant, but by in the Cu matrix, producing NiAl3 precipitated phase particle, give full play to the particle reinforced effect of NiAl3 and improve alloy strength, by Al the Ni atom " suction " that is solid-solubilized in the Cu matrix is gone out the detrimental effect of avoiding the Ni atom pairs alloy specific conductivity of solid solution to cause simultaneously.
The beneficial effect that the present invention has
High-strength highly-conductive Cu-Ni-Al alloy preparation method of the present invention only comprises melting casting, cold rolling, three steps of direct aging, course of processing simple controllable, and the short energy consumption of flow process is low, is fit to large-scale commercial production.This high-strength highly-conductive alloy only comprises Cu, Ni and three kinds of cheap metals of Al simultaneously, and the cost of material is low.The alloy property scope of the present invention's preparation is wide, can obtain multiple intensity and specific conductivity coupling by control cold rolling reduction and aging technique.
Embodiment
Composition: 0.4%Ni, 0.4%Al, all the other are Cu.
Preparation method: Cu, Al are placed vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1000 ℃, in stove, fill Ar to 60kPa, add Ni and fusing again, evenly be cast to water cooled copper mould through induction stirring, the water coolant flow velocity is 0.02m/s in the copper mold.It is to carry out 400 ℃ of ageing treatment 1h air coolings after 70% that ingot casting is cold-rolled to draught.
Performance: recording strength of alloy according to GB GB/T228-2002 is 650MPa, and recording the alloy room-temperature conductivity according to four-point method is 80%IACS.
Embodiment 2:
Composition: 0.4%Ni, 0.4%Al, all the other are Cu.
Preparation method: Cu, Al are placed vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1000 ℃, in stove, fill Ar to 60kPa, add Ni and fusing again, evenly be cast to water cooled copper mould through induction stirring, the water coolant flow velocity is 0.1m/s in the copper mold.It is to carry out 500 ℃ of ageing treatment 0.5h air coolings after 85% that ingot casting is cold-rolled to draught.
Performance: recording strength of alloy according to GB GB/T228-2002 is 510MPa, and recording the alloy room-temperature conductivity according to four-point method is 90%IACS.
Embodiment 3:
Composition: 0.4%Ni, 0.4%Al, all the other are Cu.
Preparation method: Cu, Al are placed vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1000 ℃, in stove, fill Ar to 60kPa, add Ni and fusing again, evenly be cast to water cooled copper mould through induction stirring, the water coolant flow velocity is 0.4m/s in the copper mold.It is to carry out 200 ℃ of ageing treatment 10h air coolings after 95% that ingot casting is cold-rolled to draught.
Performance: recording strength of alloy according to GB GB/T228-2002 is 790MPa, and recording the alloy room-temperature conductivity according to four-point method is 70%IACS.
Embodiment 4:
Composition: 0.4%Ni, 0.4%Al, all the other are Cu.
Preparation method: Cu, Al are placed vacuum induction furnace, melt being lower than under the 0.1Pa normal atmosphere, after leaving standstill degasification under 1000 ℃, in stove, fill Ar to 60kPa, add Ni and fusing again, evenly be cast to water cooled copper mould through induction stirring, the water coolant flow velocity is 1.0m/s in the copper mold.It is to carry out 600 ℃ of ageing treatment 0.2h air coolings after 90% that ingot casting is cold-rolled to draught.
Performance: recording strength of alloy according to GB GB/T228-2002 is 900MPa, and recording the alloy room-temperature conductivity according to four-point method is 75%IACS.
Above-mentioned specific embodiment is used for the present invention that explains, rather than limits the invention.In the protection domain of spirit of the present invention and claim, any modification and change that the present invention is made all fall into protection scope of the present invention.
Claims (5)
1. method for preparing high-strength highly-conductive Cu-Ni-Al alloy is characterized in that to alloy raw material direct cold rolling is carried out 200～600 ℃ of ageing treatment 0.2～10h afterwards to certain deflection after melting is cast to water cooled copper mould.
2. water cooled copper mould as claimed in claim 1, the flow velocity that it is characterized in that water coolant in the water cooled copper mould is 0.02～1.0m/s, preferred especially 0.4m/s.
3. preparation high-strength highly-conductive Cu-Ni-Al alloy method as claimed in claim 1 is characterized in that cold roling reduction is 70%～95%, preferred especially 90%.
4. can adopt air cooling or the cold mode of stove to cool off after the ageing treatment as claimed in claim 1.
5. high-strength highly-conductive Cu-Ni-Al alloy as claimed in claim 1 is characterized in that it is 0.4% that alloy has following composition: Ni, and Al is 0.4%, and all the other are Cu.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010540386 CN102041366B (en) | 2010-11-11 | 2010-11-11 | Direct aging method for preparing high-strength high-conductivity Cu-Ni-Al conductor material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010540386 CN102041366B (en) | 2010-11-11 | 2010-11-11 | Direct aging method for preparing high-strength high-conductivity Cu-Ni-Al conductor material |
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| CN102041366A true CN102041366A (en) | 2011-05-04 |
| CN102041366B CN102041366B (en) | 2012-12-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0331437A (en) * | 1989-06-27 | 1991-02-12 | Furukawa Electric Co Ltd:The | Copper alloy for sliding and electrification excellent in heat resistance and wear resistance and its production |
| US5846346A (en) * | 1995-12-08 | 1998-12-08 | Poongsan Corporation | High strength high conductivity Cu-alloy of precipitate growth suppression type and production process |
| CN100595312C (en) * | 2008-01-09 | 2010-03-24 | 浙江大学 | Solid solution aging technique for modifying Cu-Ag alloy rigidity and electric conductivity |
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- 2010-11-11 CN CN 201010540386 patent/CN102041366B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0331437A (en) * | 1989-06-27 | 1991-02-12 | Furukawa Electric Co Ltd:The | Copper alloy for sliding and electrification excellent in heat resistance and wear resistance and its production |
| US5846346A (en) * | 1995-12-08 | 1998-12-08 | Poongsan Corporation | High strength high conductivity Cu-alloy of precipitate growth suppression type and production process |
| CN100595312C (en) * | 2008-01-09 | 2010-03-24 | 浙江大学 | Solid solution aging technique for modifying Cu-Ag alloy rigidity and electric conductivity |
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| CN102041366B (en) | 2012-12-26 |
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