CN110444320B - High-strength high-conductivity carbon fiber reinforced aluminum-based composite wire and preparation method thereof - Google Patents
High-strength high-conductivity carbon fiber reinforced aluminum-based composite wire and preparation method thereof Download PDFInfo
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- CN110444320B CN110444320B CN201910734642.7A CN201910734642A CN110444320B CN 110444320 B CN110444320 B CN 110444320B CN 201910734642 A CN201910734642 A CN 201910734642A CN 110444320 B CN110444320 B CN 110444320B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
- C22C49/06—Aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
Abstract
The invention provides a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire and a preparation method thereof, and belongs to the technical field of aluminum-based composite wires. The high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire provided by the invention comprises carbon fiber bundles and an aluminum-based matrix, wherein the carbon fiber bundles are wrapped by the aluminum-based matrix and are soaked among carbon fiber filaments of the carbon fiber bundles. The aluminum-based matrix is filled among the carbon fiber yarns of the carbon fiber bundles in the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire, the carbon fibers and the aluminum-based matrix are tightly combined, the high-conductivity carbon fiber reinforced aluminum-based composite wire has high conductivity and excellent mechanical property, the tensile strength can reach 114MPa, the high-conductivity carbon fiber reinforced aluminum-based composite wire has certain bending capacity, and wires and cables with different section sizes can be manufactured through subsequent stranding.
Description
Technical Field
The invention relates to the technical field of aluminum-based composite wires, in particular to a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire and a preparation method thereof.
Background
The high-strength and high-conductivity aluminum alloy conductor is an important high-voltage transmission line material and is widely applied in 1950 worldwide. However, the aluminum alloy has a contradiction that the high strength and the high conductivity cannot be obtained at the same time, and table 1 shows that several common aluminum alloy wire materials are adopted, wherein the conductivity of a 1350 pure aluminum wire can reach 61% IACS, but the tensile strength is only 124 MPa; with increasing the content of alloy elements Mg and Si, the strength of the aluminum alloy is continuously improved, but the electric conductivity is obviously reduced, for example, 6061 alloy, by increasing the content of Mg and Si elements and matching with a proper heat treatment process (T6), the tensile strength can reach 310MPa, but the electric conductivity is reduced to 40 percent due to the existence of excessive strengthening particles in a matrix, and the large-scale application of the high-strength aluminum alloy lead is severely restricted by excessive power transmission loss.
TABLE 1 trade mark of common Al-alloy conductor, content and performance of main strengthening elements
The strength is improved on the premise of keeping high conductivity, and the good matching of the conductivity and the mechanical property is achieved, which is always a hot point problem concerned in the field of electric power materials. The aluminum-based composite material provides a new idea for the research and development of high-strength and high-conductivity aluminum alloy wires. The metal matrix composite layer material which is composed of the continuous carbon fiber bundle reinforcing phase as the core layer and the high-conductivity aluminum alloy as the outer layer reserves the advantages of low density, high conductivity, good corrosion resistance and good processability of the aluminum-based material, and has high strength due to the addition of the carbon fibers. The carbon fiber bundles are concentrated in the aluminum alloy core part, and the influence on the conductivity of the material is small, so that the composite material can have both high strength and high conductivity. In the beginning of the last 90 th century, carbon fiber composite core aluminum conductors were developed successively in Japan, America and China, wherein a core layer of the carbon fiber composite core aluminum conductor is a single core rod which is made of carbon fiber serving as a center and glass fiber cladding, and the periphery of the core rod is formed by stranding a plurality of strands of aluminum alloy. The composite wire has strong impact resistance, tensile strength and bending stress. However, the composite core rod needs to have a certain size and volume ratio, so that the composite lead has high rigidity, a large cross section and is difficult to bend, and the process requirements of coiling, stranding, construction and the like are influenced.
Disclosure of Invention
The invention aims to provide a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire which comprises carbon fiber bundles and an aluminum-based matrix, wherein the carbon fiber bundles are wrapped by the aluminum-based matrix and are soaked among carbon fiber filaments of the carbon fiber bundles.
Preferably, the diameter of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire is 5-15 mm.
Preferably, the volume percentage of the carbon fiber bundle is 1-5%.
Preferably, the aluminum-based substrate is aluminum alloy or metal aluminum
The invention also provides a preparation method of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire, which comprises the following steps:
and (3) drawing and immersing the carbon fiber bundle into the aluminum-based melt, and sequentially carrying out ultrasonic treatment, pulsed magnetic field treatment, indirect cooling, extrusion and direct cooling to obtain the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire.
Preferably, the ultrasonic wave direction of the ultrasonic treatment is perpendicular to the carbon fiber bundle, the power of the ultrasonic treatment is not less than 300W, and the time is 1-2 min.
Preferably, the magnetic induction line direction of the pulsed magnetic field treatment is perpendicular to the carbon fiber bundle, the frequency of the pulsed magnetic field treatment is 1-30 Hz, the intensity of the pulsed magnetic field is 10-40 mT, and the time is 2-4 min.
Preferably, the deformation amount of the extrusion is 6-10%.
Preferably, the temperature of circulating water for indirect cooling is 10-20 ℃, and the time for indirect cooling is 1-2 min; the temperature of cooling water for direct cooling is 10-20 ℃, and the time for direct cooling is 1-2 min.
Preferably, the temperature of the aluminum-based melt is 710-730 ℃.
The invention provides a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire which comprises carbon fiber bundles and an aluminum-based matrix, wherein the carbon fiber bundles are wrapped by the aluminum-based matrix and are soaked among carbon fiber filaments of the carbon fiber bundles. The carbon fiber bundles in the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire are filled with the aluminum-based matrix between the carbon fiber yarns, the carbon fibers and the aluminum-based matrix are tightly combined, the conductivity can be improved, the mechanical property is excellent, the tensile strength is greater than 114MPa, the bending strength is higher than that of a pure aluminum wire, and the flexibility is similar to that of the pure aluminum wire, so that the wire and cable with different section sizes can be manufactured through subsequent stranding.
The invention also provides a preparation method of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire, which comprises the following steps: and (3) drawing and immersing the carbon fiber bundle into the aluminum-based melt, and sequentially carrying out ultrasonic treatment, pulsed magnetic field treatment, indirect cooling, extrusion and direct cooling to obtain the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire. The preparation method is simple, easy to operate, capable of realizing continuous preparation and suitable for industrial application.
Drawings
FIG. 1 shows an apparatus for preparing a high-strength and high-conductivity carbon fiber reinforced aluminum-based composite wire according to an embodiment of the present invention,
wherein 1 is a carbon fiber bundle, 2-is an aluminum-based melt, 3 is a positioning roller, 4 is an ultrasonic tool head, 5 is a pulsed magnetic field generator, 6 is a crystallizer, 7 is an extrusion nozzle, 8 is a direct cooling part, 9 is a traction roller, and 10 is a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire;
FIG. 2 is an SEM image of the cross section of a high-strength and high-conductivity carbon fiber reinforced aluminum-based composite wire obtained in example 1;
FIG. 3 three point bend samples and three point bend curves of example 2 and comparative example 1.
Detailed Description
The invention provides a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire which comprises carbon fiber bundles and an aluminum-based matrix, wherein the carbon fiber bundles are wrapped by the aluminum-based matrix and are soaked among carbon fiber filaments of the carbon fiber bundles.
In the invention, the diameter of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire is 5-15 mm, and more preferably 10 mm. In the invention, the high-strength high-conductivity carbon fiber reinforced aluminum conductor composite conductor retains certain deformability, and the diameters are beneficial to manufacturing electric wires and cables with different section sizes through subsequent stranding.
In the invention, the volume percentage content of the carbon fiber bundle is preferably 1-5%; the diameter of the carbon fiber filament is preferably 6-8 μm.
In the invention, the aluminum-based substrate is aluminum alloy or metal aluminum; the aluminium alloy is preferably an aluminium alloy containing Mg and/or Si, the Mg content preferably being < 0.3 wt.%, the Si content preferably being < 0.2 wt.%.
The invention also provides a preparation method of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire, which comprises the following steps:
and (3) drawing and immersing the carbon fiber bundle into the aluminum-based melt, and sequentially carrying out ultrasonic treatment, pulsed magnetic field treatment, indirect cooling, extrusion and direct cooling to obtain the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire.
In the invention, in the ultrasonic treatment process, when ultrasonic waves are transmitted in the aluminum-based melt, micro bubbles (cavitation nuclei) in the liquid are rapidly expanded and closed under the action of the ultrasonic waves, huge energy can be released when the micro bubbles are rapidly collapsed, micro jet flow with the speed of 110m/s is generated, and high temperature and high pressure are generated in a local micro area. The strong cavitation is beneficial to improving the wettability of an Al/C system and promoting the aluminum liquid to infiltrate into the carbon fibers; in the process of the pulsed magnetic field treatment, the pulsed magnetic field generates electromagnetic force, so that the aluminum-based melt generates periodic repeated extrusion on the carbon fiber bundle, on one hand, the infiltration process is promoted, on the other hand, an electromagnetic pressure gradient is formed in the melt, so that forced convection is generated in the aluminum-based melt, the temperature and solute (namely alloy elements) in the melt are uniformly distributed, and the infiltration effect is improved; when indirect cooling is carried out, the outer layer in contact with cooling equipment is firstly condensed, the interior is in a semi-solidification state, then extrusion is carried out, the extrusion process promotes the combination of the aluminum-based melt and the carbon fibers on one hand, and on the other hand, certain deformation treatment effectively eliminates the casting defects such as air holes at the interface, improves the material density, and then the material is completely solidified through direct cooling, thereby obtaining the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire. In addition, the preparation method provided by the invention can realize continuous preparation of the high-strength and high-conductivity carbon fiber reinforced aluminum-based composite wire, and is suitable for industrial production.
In the invention, the ultrasonic direction of the ultrasonic treatment is preferably vertical to the carbon fiber bundle, the power of the ultrasonic treatment is preferably more than or equal to 300W, and the time (namely the time of the carbon fiber bundle passing through the ultrasonic treatment area) is preferably 1-2 min; the frequency of the ultrasonic treatment is preferably 20 kHz; the vertical distance between an ultrasonic tool head of ultrasonic equipment used for ultrasonic treatment and the carbon fiber bundle is preferably 10-20 mm. Under the coordination of the ultrasonic power and the time, the infiltration effect of the aluminum-based melt is optimal.
In the invention, the magnetic induction line direction of the pulsed magnetic field treatment is preferably perpendicular to the carbon fiber bundle, the frequency of the pulsed magnetic field treatment is preferably 1-30 Hz, the intensity of the pulsed magnetic field treatment is preferably 10-40 mT, and the time (namely the time for the carbon fiber bundle to pass through the pulsed magnetic field treatment area) is preferably 2-4 min. In the embodiment of the invention, in order to obtain the frequency and the strength of the magnetic field treatment, the discharge voltage of the capacitor used for the pulsed magnetic field treatment is preferably 700V, the number of turns of the coil of the pulsed magnetic field generator is preferably 80, the pulse width of a single pulse is preferably 0.5-5 ms, and the power of the single pulse is preferably 0.5-5 kW. In a period of pulse magnetic field treatment, the aluminum-based melt is firstly subjected to the action of magnetic pressure pointing to the direction of the carbon fiber bundle, so that the aluminum-based melt extrudes the carbon fiber bundle from the periphery of the carbon fiber bundle, then the electromagnetic extrusion force disappears, the magnetic pulling force appears, and the aluminum-based melt stretches under the action of the pulling force, so that the aluminum-based melt periodically and repeatedly extrudes the carbon fiber bundle, and the occurrence of an infiltration process is promoted.
In the invention, the indirect cooling is preferably carried out in a cooling crystallizer, the indirect cooling is preferably carried out by using circulating water for cooling, the time of the indirect cooling (namely the time of the carbon fiber bundles passing through a cooling area) is preferably 1-2 min, and the water flow rate of the indirect cooling is preferably 30-50L/h; the temperature of the circulating water is preferably 10-20 ℃; in the invention, the indirect cooling can condense the aluminum-based melt in the crystallizer to form a shell with certain strength, thereby ensuring continuous traction, and simultaneously being beneficial to further infiltration of the aluminum-based melt in the subsequent extrusion process because the aluminum-based melt in the crystallizer is still liquid.
In the invention, the deformation amount in the extrusion process is preferably 6-10%. In the invention, the deformation can ensure that the carbon fiber bundle is kept complete and does not break, and meanwhile, the non-infiltration area is well filled; meanwhile, no obvious interface exists between the carbon fiber filaments and the aluminum matrix, and no obvious hole (delamination) defect remains.
In the invention, the direct cooling mode is preferably water spray cooling, the temperature of cooling water for direct cooling is preferably 10-20 ℃, and the time for direct cooling is preferably 1-2 min. In the present invention, direct cooling enables the composite material to be rapidly cooled and completely solidified.
In the invention, the pulling speed is preferably 30-60 mm/min. In the present invention, the above-mentioned pulling rate can achieve a high yield.
In the invention, the temperature of the aluminum-based melt is preferably 50-80 ℃ above the melting point of the aluminum-based substrate, and in the embodiment of the invention, when the aluminum-based substrate is metal aluminum, the temperature of the aluminum-based melt is preferably 710-730 ℃. In the invention, the aluminum-based melt is kept at a high temperature state, which is beneficial to fully playing the effects of ultrasonic and pulsed magnetic fields and promoting the infiltration of the aluminum-based melt into the carbon fiber bundles.
The device used for realizing the preparation method is not particularly limited, and the process can be implemented, and in the embodiment of the invention, the device shown in fig. 1 is preferably used for preparing the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire, and as shown in fig. 1, the device comprises a positioning roller 3, an ultrasonic tool head 4, a pulsed magnetic field generator 5, a crystallizer 6, an extrusion nozzle 7, a direct cooling part 8 and a traction roller 9. In the using process of the device, a traction roller pulls a carbon fiber bundle to step, the carbon fiber bundle 1 enters an aluminum-based solution 2 under the traction action of the traction roller, an ultrasonic tool head is arranged in parallel with the carbon fiber bundle so as to enable the direction of ultrasonic waves to be vertical to the carbon fiber bundle, the carbon fiber bundle is subjected to ultrasonic treatment so as to enable the aluminum-based solution to infiltrate into the carbon fiber bundle, then the aluminum-based solution is converted into the direction vertical to the ultrasonic tool head through a positioning roller, the carbon fiber bundle is further introduced into a pulsed magnetic field treatment area (namely the position corresponding to a pulsed magnetic field generator) under the traction action, the aluminum-based solution is further infiltrated into the carbon fiber bundle after the pulsed magnetic field treatment, then the carbon fiber bundle enters a crystallizer for indirect cooling, the part of the outer part of the material, which is in contact with the crystallizer, is firstly solidified, when the composite wire rod is pulled out of the crystallizer, the outer, the extrusion process promotes the combination of the aluminum-based matrix and the carbon fibers on one hand, and effectively eliminates casting defects such as air holes and the like at an interface through certain deformation treatment on the other hand, improves the compactness of the material, extrudes and discharges the material, and directly cools (specifically, sprays water for cooling in the embodiment of the invention) to obtain the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire.
The present invention provides a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire and a method for manufacturing the same, which are described in detail below with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Preparing a high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire by using the device shown in FIG. 1, immersing a carbon fiber bundle consisting of 3000 carbon fiber yarns with the diameter of 7 microns into molten aluminum at 720 ℃ under the traction action (the traction speed is 36mm/min), and performing ultrasonic treatment, wherein the distance between an ultrasonic tool head and the carbon fiber bundle is 10mm, the power of the ultrasonic treatment is 300W, the frequency is 20kHz, the length of an ultrasonic region is 60mm, and the time of the carbon fiber bundle passing through the ultrasonic region is 1.67 min; under the traction action, the carbon fiber bundle reaches the positioning roller, is converted into the direction vertical to the ultrasonic tool head, then enters a pulse magnetic field processing area for pulse magnetic field processing, the frequency of the pulse magnetic field processing is 5Hz, the pulse width of a single pulse is 2ms, the peak value of pulse current is 500A, the magnetic field intensity is 40mT, and the time of passing through the pulse magnetic field processing area is 4 min; after the pulse magnetic field treatment is finished, the carbon fiber bundle enters a crystallizer under the traction action to be cooled, the temperature of cooling water is 15 ℃, the water flow in the crystallizer is 40L/h, the time of passing through the crystallizer is 2min, at the moment, a solidified shell is formed outside the composite material, the interior of the composite material is not completely cooled, the carbon fiber bundle enters an extrusion nozzle under the traction action to be extruded, and the extrusion deformation is 8%; directly cooling the molded composite conductor from the extrusion nozzle by using water with the temperature of 15 ℃, wherein the cooling time is 2 min; after cooling, the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire with the diameter of 10mm is obtained.
As shown in fig. 2, it can be seen from fig. 2 that the aluminum matrix of the lead obtained in the present embodiment is fully filled between the fiber filaments of the carbon fiber bundle, and the lead has no void therein.
Example 2
The high-strength and high-conductivity carbon fiber reinforced aluminum-based composite wire prepared by the method of example 1 is different in that the carbon fiber bundle is formed by 2 ten thousand carbon fiber filaments with the diameter of 7 microns.
The tensile strength of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire obtained in the example was tested according to the method disclosed in standard number GB/T228.1-2010, and the result was 114 MPa.
Comparative example 1
Pure aluminum wires having a diameter of 10mm were prepared under the same conditions.
The tensile strength of the pure aluminum wire obtained in this comparative example was measured according to the method disclosed in GB/T228.1-2010, and found to be 65 MPa.
The three-point bending test was performed on the wires obtained in example 2 and comparative example 1 in accordance with the method disclosed in standard No. GB/T232-2010, and the three-point bending samples and the three-point bending curves obtained are shown in FIG. 3, in which (a) is the three-point bending sample obtained and (b) is the bending curve obtained. As can be seen from (a), the composite wire obtained in this example has similar bendability to a pure aluminum wire, and can be coiled, stranded, and the like; as can be seen from (b), the composite wire obtained in example 2 has higher bending strength than the pure aluminum wire obtained in comparative example 1, and a certain bending strength can prevent the wire from being damaged due to bending during the use of the wire to a certain extent.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire is characterized by comprising carbon fiber bundles and an aluminum-based matrix, wherein the carbon fiber bundles are wrapped by the aluminum-based matrix and are infiltrated among carbon fiber filaments of the carbon fiber bundles;
the preparation method of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire comprises the following steps:
the carbon fiber bundle is drawn and immersed into the aluminum-based melt, and ultrasonic treatment, pulsed magnetic field treatment, indirect cooling, extrusion and direct cooling are sequentially carried out, so that the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire is obtained;
the indirect cooling is carried out by using circulating water for cooling, the time of the indirect cooling is 1-2 min, and the water flow of the indirect cooling is 30-50L/h; the temperature of the circulating water is 10-20 ℃.
2. The high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire according to claim 1, wherein the diameter of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire is 5-15 mm.
3. The high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire as claimed in claim 1 or 2, wherein the volume percentage of the carbon fiber bundles is 1-5%.
4. The high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire according to claim 1 or 2, wherein the aluminum-based substrate is an aluminum alloy or metal aluminum.
5. The preparation method of the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire according to any one of claims 1 to 4, characterized by comprising the following steps:
the carbon fiber bundle is drawn and immersed into the aluminum-based melt, and ultrasonic treatment, pulsed magnetic field treatment, indirect cooling, extrusion and direct cooling are sequentially carried out, so that the high-strength high-conductivity carbon fiber reinforced aluminum-based composite wire is obtained; the indirect cooling is carried out by using circulating water for cooling, the time of the indirect cooling is 1-2 min, and the water flow of the indirect cooling is 30-50L/h; the temperature of the circulating water is 10-20 ℃.
6. The preparation method according to claim 5, wherein the ultrasonic wave direction of the ultrasonic treatment is perpendicular to the carbon fiber bundle, the power of the ultrasonic treatment is not less than 300W, and the time is 1-2 min.
7. The method according to claim 5, wherein the pulsed magnetic field treatment has a magnetic induction line perpendicular to the carbon fiber bundle, a frequency of 1 to 30Hz, a magnetic field strength of 10 to 40mT, and a time of 2 to 4 min.
8. The method according to claim 5, wherein the extrusion deformation amount is 6 to 10%.
9. The preparation method according to claim 5, wherein the temperature of the circulating water for indirect cooling is 10-20 ℃, and the time for indirect cooling is 1-2 min; the temperature of cooling water for direct cooling is 10-20 ℃, and the time for direct cooling is 1-2 min.
10. The method according to claim 5, wherein the temperature of the aluminum-based melt is 50 to 80 ℃ above the melting point of the aluminum-based substrate.
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| CN104517674A (en) * | 2013-10-08 | 2015-04-15 | 国家电网公司 | Aluminum-based carbon fiber composite core wire |
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