CN109454217B - Preparation method of copper-aluminum composite board - Google Patents
Preparation method of copper-aluminum composite board Download PDFInfo
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- CN109454217B CN109454217B CN201811300175.9A CN201811300175A CN109454217B CN 109454217 B CN109454217 B CN 109454217B CN 201811300175 A CN201811300175 A CN 201811300175A CN 109454217 B CN109454217 B CN 109454217B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
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Abstract
The invention relates to a preparation method of a copper-aluminum composite plate, which comprises the steps of heating a casting mold to 980-1020 ℃, slightly lower than the melting temperature of copper, ensuring that the hardness of a cylinder body is lower, partially embedding a porous carbon fiber rod fixed on the inner wall of the cylinder body into the inner wall of the cylinder body under the action of a centrifugal machine, pouring aluminum liquid accounting for 30-75% of the volume of the cylinder body into the cylinder body, attaching the aluminum liquid to the inner wall of the cylinder body under the action of the centrifugal machine, cooling and solidifying the aluminum liquid to form a hollow shape, obtaining the cylindrical copper-aluminum composite plate with an inner layer of an aluminum plate and an outer layer of a copper plate, enabling the aluminum liquid to be mutually in diffusion connection with the copper plate in the cooling and solidifying process under the centrifugal state, embedding one part of the porous carbon fiber rod into the copper plate, and embedding the other part of the porous carbon fiber.
Description
Technical Field
The invention relates to the field of metal composite materials, in particular to a preparation method of a copper-aluminum composite plate.
Background
The copper-aluminum composite board is a novel composite material, has the advantages of high heat-conducting property and electric conductivity of copper, light weight, low price and the like of aluminum, is generally used in the industries of electronics, electric power, metallurgical equipment, machinery, automobiles and the like, and meets the requirements on functions and economy of the copper-aluminum composite board. Because the traditional copper-aluminum composite plate is mainly produced by explosion welding, brazing, friction welding, flash welding and other methods, the process is lagged behind, the yield is low, and the copper-aluminum composite interface is easy to crack.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a method for preparing a copper-aluminum composite plate with a stable copper-aluminum composite interface connection.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of a copper-aluminum composite board comprises the following steps:
s1, processing the metal copper plate into a cylinder with the outer diameter matched with the inner diameter of a cavity of a casting mold, and embedding the cylinder into the cavity of the casting mold;
s2, uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder, and heating the casting mold to 980-1020 ℃;
s3, pouring molten aluminum which accounts for 30-75% of the volume of the cylinder into the cylinder, sealing an upper end opening of the casting mold, placing the casting mold on a centrifuge for centrifugal treatment, simultaneously reducing the temperature of the casting mold to room temperature, and then closing the centrifuge to obtain the cylindrical copper-aluminum composite plate.
The invention has the beneficial effects that: heating a casting mold to 980-1020 ℃, slightly lower than the melting temperature of copper, wherein the hardness of the barrel is lower, a part of a porous carbon fiber rod fixed on the inner wall of the barrel is embedded into the inner wall of the barrel under the action of a centrifugal machine, aluminum liquid with the volume accounting for 30% -75% of the volume of the barrel is poured into the barrel, the aluminum liquid is attached to the inner wall of the barrel under the action of the centrifugal machine, the aluminum liquid is hollow after being cooled and solidified, and a tubular copper-aluminum composite plate with an aluminum plate as an inner layer and a copper plate as an outer layer is obtained.
Drawings
Fig. 1 is a schematic flow chart of a method for manufacturing a copper-aluminum composite plate according to the present invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: the casting mold is heated to 980-1020 ℃, the porous carbon fiber rod fixed on the inner wall of the cylinder body is partially embedded into the inner wall of the cylinder body under the action of the centrifugal machine, molten aluminum with the volume accounting for 30% -75% of the volume of the cylinder body is poured into the cylinder body, the molten aluminum is attached to the inner wall of the cylinder body under the action of the centrifugal machine, one part of the porous carbon fiber rod is embedded into the copper plate, the other part of the porous carbon fiber rod is embedded into the solidified aluminum plate, and the connection stability of the copper-aluminum composite interface is greatly improved.
Referring to fig. 1, the method for preparing a copper-aluminum composite board provided by the invention comprises the following steps:
s1, processing the metal copper plate into a cylinder with the outer diameter matched with the inner diameter of a cavity of a casting mold, and embedding the cylinder into the cavity of the casting mold;
s2, uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder, and heating the casting mold to 980-1020 ℃;
s3, pouring molten aluminum which accounts for 30-75% of the volume of the cylinder into the cylinder, sealing an upper end opening of the casting mold, placing the casting mold on a centrifuge for centrifugal treatment, simultaneously reducing the temperature of the casting mold to room temperature, and then closing the centrifuge to obtain the cylindrical copper-aluminum composite plate.
From the above description, it can be known that, the casting mold is heated to 980-1020 ℃, which is slightly lower than the melting temperature of copper, at this time, the hardness of the cylinder is lower, the porous carbon fiber rod fixed on the inner wall of the cylinder is partially embedded into the inner wall of the cylinder under the action of the centrifuge, the aluminum liquid with the volume accounting for 30% -75% of the volume of the cylinder is poured into the cylinder, the aluminum liquid is attached to the inner wall of the cylinder under the action of the centrifuge, the aluminum liquid is cooled and solidified to form a hollow shape, so as to obtain the cylindrical copper-aluminum composite plate with an inner layer being an aluminum plate and an outer layer being a copper plate, the aluminum liquid is in diffusion connection with the copper plate in the cooling and solidifying process under the centrifugal state, meanwhile, one part of the porous carbon fiber rod is embedded into the copper plate, and the other part of.
Further, S3 is followed by:
and S4, cutting the cylindrical wall of the cylindrical copper-aluminum composite plate to obtain the sheet copper-aluminum composite plate.
Further, S4 is followed by:
s5, rolling the sheet copper-aluminum composite plate to thin the thickness of the sheet copper-aluminum composite plate.
From the above description, the sheet copper-aluminum composite plate is rolled, so that the thickness of the sheet copper-aluminum composite plate is reduced, and the connection strength of the copper-aluminum composite interface can be further improved.
Further, S5 is followed by:
s6, placing the sheet copper-aluminum composite board in a hot-pressing mould for hot-pressing diffusion treatment.
As can be seen from the above description, the hot-pressing diffusion treatment further diffusion-bonds the copper phase and the aluminum phase at the copper-aluminum composite interface.
Further, S401, placing the sheet copper-aluminum composite board in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s402, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 520-560 ℃, and pressurizing the hot pressing mold to 8-10 MPa;
s403, preserving the heat of the sheet copper-aluminum composite board at 520-560 ℃ for 30-60 minutes.
Further, in S2, a metal nickel layer is deposited on the surface of the porous carbon fiber rod.
From the above description, it can be known that nickel atoms in the metal nickel layer will diffuse into the copper phase and the aluminum phase to form a copper-aluminum-nickel composite phase around the porous carbon fiber rod, so that the connection strength of the copper-aluminum composite interface is greatly improved.
Further, the deposition of the metallic nickel layer comprises the following steps:
and cleaning the surface of the porous carbon fiber rod by using alcohol, and then putting the porous carbon fiber rod into a physical vapor deposition furnace to perform nickel deposition on the surface of the porous carbon fiber rod for 1-3 hours.
From the above description, the porous carbon fiber rod is placed in a physical vapor deposition furnace for nickel deposition, and the obtained metal nickel layer has uniform thickness, so that the obtained copper-aluminum-nickel composite phase is uniformly distributed around the porous carbon fiber rod.
Further, in S2, the step of uniformly fixing three or more porous carbon fiber rods to the inner wall of the cylinder in the circumferential direction of the cylinder includes: more than three porous carbon fiber rods are uniformly fixed on the inner wall of the cylinder along the circumferential direction of the cylinder through pins made of aluminum alloy.
From the above description, it can be known that the pin made of aluminum alloy plays a role in temporary fixation, and after the aluminum liquid is poured, part of the pin is melted in the aluminum liquid.
Further, S3 includes:
s301, pouring molten aluminum, the volume of which accounts for 30% -75% of the volume of the cylinder, into the cylinder, and sealing an upper end opening of the casting mold;
s302, placing the casting mold on a centrifuge, performing centrifugation treatment at the rotating speed of 1200-1600 rpm for 20-35 minutes, and simultaneously reducing the temperature of the casting mold to room temperature;
and S303, closing the centrifugal machine to obtain the cylindrical copper-aluminum composite plate.
Further, the aluminum liquid is an aluminum-nickel alloy liquid.
Referring to fig. 1, a first embodiment of the present invention is:
a preparation method of a copper-aluminum composite board comprises the following steps:
s1, processing the metal copper plate into a cylinder with the outer diameter matched with the inner diameter of a cavity of a casting mold, and embedding the cylinder into the cavity of the casting mold;
s2, uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder, and heating the casting mold to 980 ℃;
wherein, a metal nickel layer is deposited on the surface of the porous carbon fiber rod in S2;
specifically, the deposition of the metallic nickel layer comprises the following steps:
cleaning the surface of the porous carbon fiber rod by using alcohol, and then putting the porous carbon fiber rod into a physical vapor deposition furnace to perform nickel deposition on the surface of the porous carbon fiber rod for 2 hours;
specifically, the step of uniformly fixing three or more porous carbon fiber rods to the inner wall of the cylinder in the circumferential direction of the cylinder in S2 includes: uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder by pins made of aluminum alloy;
s3, pouring aluminum liquid with volume accounting for 75% of the volume of the cylinder into the cylinder, sealing an upper end opening of the casting mold, placing the casting mold on a centrifuge for centrifugal treatment, simultaneously reducing the temperature of the casting mold to room temperature, and then closing the centrifuge to obtain the cylindrical copper-aluminum composite plate;
wherein S3 includes:
s301, pouring molten aluminum with volume accounting for 75% of the volume of the cylinder into the cylinder, and sealing an upper end opening of the casting mold;
s302, placing the casting mold on a centrifuge, performing centrifugal treatment at the rotating speed of 1200rpm for 30 minutes, and simultaneously reducing the temperature of the casting mold to room temperature;
s303, closing the centrifugal machine to obtain a cylindrical copper-aluminum composite plate;
s4, cutting the cylindrical wall of the cylindrical copper-aluminum composite plate to obtain a sheet copper-aluminum composite plate;
s5, rolling the sheet copper-aluminum composite plate to thin the thickness of the sheet copper-aluminum composite plate;
s6, placing the sheet copper-aluminum composite board in a hot-pressing mould for hot-pressing diffusion treatment;
wherein S6 includes:
s601, placing the sheet copper-aluminum composite plate in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s602, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 560 ℃, and pressurizing the hot pressing mold to 8 MPa;
s603, preserving the heat of the sheet copper-aluminum composite board for 60 minutes at 560 ℃.
The second embodiment of the invention is as follows:
a preparation method of a copper-aluminum composite board comprises the following steps:
s1, processing the metal copper plate into a cylinder with the outer diameter matched with the inner diameter of a cavity of a casting mold, and embedding the cylinder into the cavity of the casting mold;
s2, uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder, and heating the casting mold to 1020 ℃;
wherein, a metal nickel layer is deposited on the surface of the porous carbon fiber rod in S2;
specifically, the deposition of the metallic nickel layer comprises the following steps:
cleaning the surface of the porous carbon fiber rod by using alcohol, and then putting the porous carbon fiber rod into a physical vapor deposition furnace to perform nickel deposition on the surface of the porous carbon fiber rod for 1 hour;
specifically, the step of uniformly fixing three or more porous carbon fiber rods to the inner wall of the cylinder in the circumferential direction of the cylinder in S2 includes: uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder by pins made of aluminum alloy;
s3, pouring aluminum liquid with the volume accounting for 50% of the volume of the cylinder into the cylinder, sealing an upper end opening of the casting mold, placing the casting mold on a centrifuge for centrifugal treatment, simultaneously reducing the temperature of the casting mold to room temperature, and then closing the centrifuge to obtain the cylindrical copper-aluminum composite plate;
wherein S3 includes:
s301, pouring aluminum liquid with the volume accounting for 50% of the volume of the cylinder into the cylinder, and sealing an upper end opening of the casting mold;
s302, placing the casting mold on a centrifuge, performing centrifugal treatment at the rotating speed of 1600rpm for 20 minutes, and simultaneously reducing the temperature of the casting mold to room temperature;
s303, closing the centrifugal machine to obtain a cylindrical copper-aluminum composite plate;
s4, cutting the cylindrical wall of the cylindrical copper-aluminum composite plate to obtain a sheet copper-aluminum composite plate;
s5, rolling the sheet copper-aluminum composite plate to thin the thickness of the sheet copper-aluminum composite plate;
s6, placing the sheet copper-aluminum composite board in a hot-pressing mould for hot-pressing diffusion treatment;
wherein S6 includes:
s601, placing the sheet copper-aluminum composite plate in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s602, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 540 ℃, and pressurizing the hot pressing mold to 10 MPa;
s603, preserving the temperature of the sheet copper-aluminum composite plate at 540 ℃ for 45 minutes.
The third embodiment of the invention is as follows:
a preparation method of a copper-aluminum composite board comprises the following steps:
s1, processing the metal copper plate into a cylinder with the outer diameter matched with the inner diameter of a cavity of a casting mold, and embedding the cylinder into the cavity of the casting mold;
s2, uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder, and heating the casting mold to 1000 ℃;
wherein, a metal nickel layer is deposited on the surface of the porous carbon fiber rod in S2;
specifically, the deposition of the metallic nickel layer comprises the following steps:
cleaning the surface of the porous carbon fiber rod by using alcohol, and then putting the porous carbon fiber rod into a physical vapor deposition furnace to perform nickel deposition on the surface of the porous carbon fiber rod for 3 hours;
specifically, the step of uniformly fixing three or more porous carbon fiber rods to the inner wall of the cylinder in the circumferential direction of the cylinder in S2 includes: uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder by pins made of aluminum alloy;
s3, pouring aluminum liquid with the volume accounting for 30% of the volume of the cylinder into the cylinder, sealing an upper end opening of the casting mold, placing the casting mold on a centrifuge for centrifugal treatment, simultaneously reducing the temperature of the casting mold to room temperature, and then closing the centrifuge to obtain the cylindrical copper-aluminum composite plate;
wherein S3 includes:
s301, pouring molten aluminum with the volume accounting for 30% of the volume of the cylinder into the cylinder, and sealing an upper end opening of the casting mold;
s302, placing the casting mold on a centrifuge, performing centrifugal treatment at the rotating speed of 1400rpm for 35 minutes, and simultaneously reducing the temperature of the casting mold to room temperature;
s303, closing the centrifugal machine to obtain a cylindrical copper-aluminum composite plate;
s4, cutting the cylindrical wall of the cylindrical copper-aluminum composite plate to obtain a sheet copper-aluminum composite plate;
s5, rolling the sheet copper-aluminum composite plate to thin the thickness of the sheet copper-aluminum composite plate;
s6, placing the sheet copper-aluminum composite board in a hot-pressing mould for hot-pressing diffusion treatment;
wherein S6 includes:
s601, placing the sheet copper-aluminum composite plate in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s602, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 520 ℃, and pressurizing the hot pressing mold to 9 MPa;
s603, preserving the heat of the sheet copper-aluminum composite plate for 60 minutes at 520 ℃.
In summary, according to the preparation method of the copper-aluminum composite board provided by the invention, the casting mold is heated to 980-1020 ℃ and slightly lower than the melting temperature of copper, at the moment, the hardness of the cylinder body is lower, the porous carbon fiber rod fixed on the inner wall of the cylinder body is partially embedded into the inner wall of the cylinder body under the action of the centrifugal machine, aluminum liquid with the volume accounting for 30% -75% of the volume of the cylinder body is poured into the cylinder body, the aluminum liquid is attached to the inner wall of the cylinder body under the action of the centrifugal machine, the aluminum liquid is cooled and solidified to be hollow, the cylindrical copper-aluminum composite board with the inner layer being an aluminum plate and the outer layer being a copper plate is obtained, the aluminum liquid is mutually diffusion-connected with the copper plate in the cooling and solidifying process under the centrifugal state, meanwhile, one part of the porous carbon fiber rod is embedded into the copper plate, and the other.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. The preparation method of the copper-aluminum composite board is characterized by comprising the following steps:
s1, processing the metal copper plate into a cylinder with the outer diameter matched with the inner diameter of a cavity of a casting mold, and embedding the cylinder into the cavity of the casting mold;
s2, uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder, and heating the casting mold to 980-1020 ℃;
s3, pouring molten aluminum, the volume of which accounts for 30% -75% of the volume of the barrel, into the barrel, sealing an opening at the upper end of the casting mold, placing the casting mold on a centrifuge for centrifugal treatment, simultaneously reducing the temperature of the casting mold to room temperature, and then closing the centrifuge to obtain the cylindrical copper-aluminum composite plate;
and S4, cutting the cylindrical wall of the cylindrical copper-aluminum composite plate to obtain the sheet copper-aluminum composite plate.
2. The method for preparing the copper-aluminum composite board according to claim 1, further comprising, after S4:
s5, rolling the sheet copper-aluminum composite plate to thin the thickness of the sheet copper-aluminum composite plate.
3. The method for preparing the copper-aluminum composite board according to claim 2, further comprising, after S5:
s6, placing the sheet copper-aluminum composite board in a hot-pressing mould for hot-pressing diffusion treatment.
4. The method for preparing the copper-aluminum composite plate according to claim 3, wherein S6 comprises:
s601, placing the sheet copper-aluminum composite plate in a hot-pressing mold, and then placing the hot-pressing mold in a vacuum sintering furnace;
s602, vacuumizing the vacuum sintering furnace, raising the temperature in the vacuum sintering furnace to 520-560 ℃, and pressurizing the hot pressing mold to 8-10 MPa;
s603, preserving the heat of the sheet copper-aluminum composite board at 520-560 ℃ for 30-60 minutes.
5. The method for preparing the copper-aluminum composite board according to claim 1, wherein a metal nickel layer is deposited on the surface of the porous carbon fiber rod in S2.
6. The method for preparing the copper-aluminum composite plate according to claim 5, wherein the deposition of the metallic nickel layer comprises the following steps:
and cleaning the surface of the porous carbon fiber rod by using alcohol, and then putting the porous carbon fiber rod into a physical vapor deposition furnace to perform nickel deposition on the surface of the porous carbon fiber rod for 1-3 hours.
7. The method for preparing the copper-aluminum composite board according to claim 1, wherein the step of uniformly fixing more than three porous carbon fiber rods on the inner wall of the cylinder along the circumferential direction of the cylinder in S2 comprises the following steps: more than three porous carbon fiber rods are uniformly fixed on the inner wall of the cylinder along the circumferential direction of the cylinder through pins made of aluminum alloy.
8. The method for preparing the copper-aluminum composite plate according to claim 1, wherein S3 comprises:
s301, pouring molten aluminum, the volume of which accounts for 30% -75% of the volume of the cylinder, into the cylinder, and sealing an upper end opening of the casting mold;
s302, placing the casting mold on a centrifuge, performing centrifugation treatment at the rotating speed of 1200-1600 rpm for 20-35 minutes, and simultaneously reducing the temperature of the casting mold to room temperature;
and S303, closing the centrifugal machine to obtain the cylindrical copper-aluminum composite plate.
9. The method for preparing the copper-aluminum composite plate according to claim 1, wherein the aluminum liquid is an aluminum-nickel alloy liquid.
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| CN113333709A (en) * | 2021-04-28 | 2021-09-03 | 芜湖磁轮传动技术有限公司 | Centrifugal casting method of conductor rotor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60141362A (en) * | 1983-12-29 | 1985-07-26 | Isuzu Motors Ltd | Formation of reinforcing layer of base metal |
| CN105478725A (en) * | 2015-12-23 | 2016-04-13 | 上海交通大学 | Method for preparing bi-metal composite through solid copper solid-liquid composite and extrusion combination |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60141362A (en) * | 1983-12-29 | 1985-07-26 | Isuzu Motors Ltd | Formation of reinforcing layer of base metal |
| CN105478725A (en) * | 2015-12-23 | 2016-04-13 | 上海交通大学 | Method for preparing bi-metal composite through solid copper solid-liquid composite and extrusion combination |
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