CN119092210A - A method for preparing a copper-aluminum alloy conductor for a radio frequency coaxial cable of a network base station - Google Patents
A method for preparing a copper-aluminum alloy conductor for a radio frequency coaxial cable of a network base station Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 30
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000004020 conductor Substances 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 67
- WXANAQMHYPHTGY-UHFFFAOYSA-N cerium;ethyne Chemical compound [Ce].[C-]#[C] WXANAQMHYPHTGY-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 19
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 15
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 13
- 239000010439 graphite Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 238000005491 wire drawing Methods 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000010583 slow cooling Methods 0.000 claims abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 54
- 238000010438 heat treatment Methods 0.000 claims description 41
- 239000000956 alloy Substances 0.000 claims description 38
- 229910045601 alloy Inorganic materials 0.000 claims description 37
- 229910052786 argon Inorganic materials 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 10
- 238000009749 continuous casting Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000000889 atomisation Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003064 anti-oxidating effect Effects 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000009941 weaving Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 34
- 239000010949 copper Substances 0.000 description 20
- 238000005253 cladding Methods 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004584 weight gain Effects 0.000 description 3
- 235000019786 weight gain Nutrition 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012300 argon atmosphere Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000002490 spark plasma sintering Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
-
- 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
- H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
- H01B13/01209—Details
-
- 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
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
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- Manufacturing & Machinery (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
本发明公开了一种网络基站射频同轴电缆用铜铝合金导线的制备方法，涉及铜铝合金制备技术领域。本发明先通过金属铈粉在熔盐介质中熔解，铈元素扩散到石墨表面，与其原位反应生成碳化铈层，达到抗氧化、增强导电性的效果；然后利用紧耦合真空感应熔炉将纳米铁粉气雾化与碳化铈结合，形成双层包覆，增强导电性，同时吸收和引导磁场，减少外部磁场的干扰，再利用放电等离子烧结炉真空烧结多次烧结改性碳化铈与金属粉末，形成强化金属块，重复多次形成堆叠层状结构，缓解界面处的应力集中，保持良好的塑性；然后连续退火缓慢降温，形成连续平整的氧化膜，提高抗氧化性能；最后轧制、拉丝、编织，制得铜铝合金导线。The invention discloses a method for preparing a copper-aluminum alloy conductor for a radio frequency coaxial cable of a network base station, and relates to the technical field of copper-aluminum alloy preparation. The invention firstly melts metal cerium powder in a molten salt medium, diffuses the cerium element to the graphite surface, and reacts with it in situ to form a cerium carbide layer, so as to achieve the effect of anti-oxidation and enhanced conductivity; then, a close-coupled vacuum induction furnace is used to atomize the nano iron powder and combine it with cerium carbide to form a double-layer coating, enhance the conductivity, absorb and guide the magnetic field at the same time, reduce the interference of the external magnetic field, and then use a discharge plasma sintering furnace to vacuum sinter the modified cerium carbide and metal powder multiple times to form a reinforced metal block, and repeatedly form a stacked layered structure to relieve stress concentration at the interface and maintain good plasticity; then, continuous annealing and slow cooling are performed to form a continuous and smooth oxide film to improve the anti-oxidation performance; finally, rolling, wire drawing, and weaving are performed to obtain the copper-aluminum alloy conductor.
Description
Technical Field
The invention relates to the technical field of copper-aluminum alloy preparation, in particular to a preparation method of a copper-aluminum alloy wire for a network base station radio frequency coaxial cable.
Background
At present, the attenuation of signals can be reduced by adopting high-frequency signal transmission in infinite communication, the anti-interference capability of the signals is improved, and long-distance signal transmission can be realized. The copper-aluminum alloy wire comprehensively combines the characteristics of high conductivity of copper, low cost of aluminum and light weight, is very suitable for being used as a transmission cable of high-frequency signals, and is widely applied to the fields of bus ducts, welding wires and the like.
Although copper and aluminum are both metallic materials with good corrosion resistance, problems of oxidation, intergranular corrosion, etc. may still occur during long-term use. Meanwhile, the strength and the plasticity of the metal structural material are two important indexes for evaluating the mechanical properties of the metal structural material, but few materials can achieve high strength and high plasticity at the same time. Therefore, the invention is particularly important for the copper-aluminum alloy wire with oxidation resistance, high strength and high conductivity.
Disclosure of Invention
The invention aims to provide a preparation method of a copper-aluminum alloy wire for a network base station radio frequency coaxial cable, which aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is prepared by carrying out vacuum sintering on modified nano cerium carbide and metal powder for multiple times by a discharge plasma sintering furnace, continuously annealing, rolling and wire drawing.
Further, the modified nano cerium carbide is prepared from metal cerium, graphite and nano iron powder.
Further, the metal powder comprises Cu powder, cu-4Al powder and Al powder.
Further, the preparation method of the copper-aluminum alloy wire for the network base station radio frequency coaxial cable comprises the following preparation steps:
(1) Uniformly mixing 6-14 parts of metal cerium powder, 18-42 parts of graphite, 30-64 parts of NaCl and 3-7 parts of NaF, placing the mixture in a vacuum reaction furnace for reaction for 30-70 min, then soaking the mixture in 71-93 parts of dilute acid solution for 1-3 h, washing the mixture with 84-102 parts of water, and drying the mixture to obtain nano cerium carbide;
(2) Charging 24-56 parts of nano cerium carbide into a smelting crucible, melting 13-45 parts of nano iron powder to prepare a molten liquid, charging the crucible into a tightly coupled vacuum induction melting furnace, and atomizing and spraying the molten liquid when the ambient temperature reaches 800 ℃ to prepare modified nano cerium carbide;
(3) Uniformly mixing 42-56 parts of Cu and 13-27 parts of modified nano cerium carbide, placing the mixture into a discharge plasma vacuum sintering furnace, heating to 800-1000 ℃ at a certain rate, adding pressure 25KN, continuously heating to 800-1000 ℃ at a certain rate, introducing argon gas, rapidly cooling, adding 19-25 parts of Cu-4Al powder and 23-31 parts of Cu powder, heating to 800-1000 ℃ at a certain rate, adding pressure 25KN, continuously heating to 10-20 min, introducing argon gas, rapidly cooling, then adding 21-33 parts of Al powder, 19-25 parts of Cu-4Al powder and 7-15 parts of modified nano cerium carbide, heating to 800-1000 ℃ at a certain rate, adding pressure 25KN, continuously heating to 10-20 min, and introducing argon gas, rapidly cooling to obtain a composite alloy block;
(4) Repeating the step (3) for three times, placing the mixture in a muffle furnace, preserving heat for 30-50 min under the protection of argon, and slowly cooling to 650 ℃ to obtain a multi-layer composite alloy block;
(5) Casting the multi-layer composite alloy block by a horizontal continuous casting machine with the casting temperature of 650-750 ℃ and the horizontal continuous casting speed of 800-1300 mm/min to obtain a round wire rod blank;
(6) And (3) placing the round wire rod blank in an alloy wire drawing machine to be drawn into a wire with the diameter of 1.38mm at the temperature of 450-550 ℃ so as to obtain the copper-aluminum alloy wire for the radio frequency coaxial cable of the network base station.
Further, the temperature of the vacuum reaction furnace in the step (1) is 1100-1500 ℃, the vacuum degree is 0.01-0.1 Pa, and the dilute acid solution is 0.5-1.5 mol/L sulfuric acid solution.
Further, the atomization spraying condition in the step (2) is that an atomization medium Ar gas is atomized, the atomization pressure is 1.0-5.0 MPa, and the atomization flow is 18-30m 3/min.
Further, the particle size of the Cu powder, the Cu-4Al powder and the Al powder in the step (3) is 250-450 meshes.
And (3) the vacuum degree of the discharge plasma vacuum sintering furnace is 1-15 Pa.
Further, the temperature rising rate in the step (3) is 80 ℃ per minute, the rapid cooling is 100-160 ℃ per hour, and the temperature is reduced to 700 ℃.
Further, the heat preservation temperature in the step (4) is 900-1000 ℃, and the slow cooling is 20-40 ℃ per hour.
Compared with the prior art, the invention has the following beneficial effects:
The invention utilizes plasma generated by pulse current and pressurizing firing in the sintering process of a spark plasma sintering furnace to enable powder to be sintered compactly at a lower temperature, on the basis, cu powder and modified nano cerium carbide are mixed and sintered once, nano cerium carbide fills metal grain boundaries to enable the powder to bear more load, cu-4Al powder and Cu powder are used as intermediate layers to be sintered secondarily to form a reinforced phase to bear larger load and pressure, strength and hardness of alloy are improved, al powder, cu-4Al powder and modified nano cerium carbide are mixed and sintered three times to improve ductility of alloy, grain growth in alloy is inhibited, toughness of alloy is improved, stacked lamellar structure is formed repeatedly three times, excessive interfaces with double gradient distribution of elements and stacking faults can be coordinated, multiple deformation mechanisms can be coordinated, stress concentration at the interfaces is relieved, good plasticity is kept, continuous annealing is slow to reduce temperature, continuous and smooth oxide films are formed, oxidation resistance is improved, and finally rolling and wire drawing are carried out to obtain copper-aluminum alloy wires.
The modified nano cerium carbide is prepared from metal cerium, graphite and nano iron powder, cerium element is diffused to the surface of graphite through melting of the metal cerium powder in a molten salt medium and reacts with the metal cerium powder in situ to generate a cerium carbide layer, so that the effects of antioxidation and conductivity enhancement are achieved, then the nano iron powder is combined with the cerium carbide through gas atomization by utilizing a tightly coupled vacuum induction melting furnace to form double-layer cladding, and the double-layer cladding is combined with an alloy during firing to enhance conductivity, absorb and guide a magnetic field, reduce interference of an external magnetic field and achieve the effect of electromagnetic shielding.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to more clearly illustrate the method provided by the invention, the following examples are used for describing the detailed description, and the method for testing each index of the copper-aluminum alloy wire for the network base station radio frequency coaxial cable manufactured in the following examples is as follows:
Tensile Strength examples and comparative examples of the same length were taken and tested with reference to GB/T1176-2013.
Elongation at break the test was carried out by taking examples and comparative examples of the same length and referring to GB/T34505-2017 method for tensile test of copper and copper alloy materials at room temperature.
Conductivity was measured by taking the examples and comparative examples of the same length and referring to GB/T3048.0-2007.
Oxidation resistance the samples were divided into class C (weight gain >0.2mg/cm 2), class B (weight gain at 0.2mg/cm 2～0.1mg/cm2) and class a (weight gain <0.1mg/cm 2) as measured in 200 ℃ environment for 1000 hours for the same length examples and comparative examples.
Example 1
(1) Uniformly mixing 6 parts of cerium metal powder, 18 parts of graphite, 30 parts of NaCl and 3 parts of NaF, reacting for 30min in a vacuum reaction furnace with the vacuum degree of 0.01Pa at 1100 ℃, then soaking for 1-3 h by 71 parts of 0.5mol/L dilute acid solution, flushing with 84-102 parts of water, and drying to obtain nano cerium carbide;
(2) Charging 24-56 parts of nano cerium carbide into a smelting crucible, melting 13 parts of nano iron powder to prepare a melt, charging the crucible into a tightly coupled vacuum induction melting furnace, and atomizing and spraying the melt by using an atomizing medium Ar gas with an atomizing pressure of 1.0MPa and an atomizing flow rate of 18m 3/min when the ambient temperature reaches 800 ℃ to prepare modified nano cerium carbide;
(3) Uniformly mixing 42 parts of 250-mesh Cu and 13 parts of modified nano cerium carbide, placing the mixture in a discharge plasma vacuum sintering furnace, heating to 800 ℃ at 80 ℃ per minute, adding pressure of 25KN, vacuum degree of 1Pa, continuously heating to 700 ℃ at 100 ℃ per hour by introducing argon, adding 19 parts of 250-mesh Cu-4Al powder and 23 parts of 250-mesh Cu powder, heating to 800 ℃ at 80 ℃ per minute, adding pressure of 25KN, vacuum degree of 1Pa, continuously heating to 10 minutes, introducing argon, rapidly heating to 700 ℃ at 100 ℃ per hour, then adding 21 parts of 250-mesh Al powder, 19 parts of 250-mesh Cu-4Al powder and 7 parts of modified nano cerium carbide, heating to 800 ℃ at 80 ℃ per minute, continuously heating to 25KN, vacuum degree of 1Pa, continuously heating to 10 minutes, and rapidly heating to 700 ℃ at 100 ℃ per hour by introducing argon, thereby obtaining a composite alloy block;
(4) Repeating the step (3) for three times, placing the mixture in a muffle furnace, preserving heat for 30min at 900 ℃ under the protection of argon, and slowly cooling to 650 ℃ at 20 ℃ per hour to obtain a multi-layer composite alloy block;
(5) Casting the multi-layer composite alloy block by a horizontal continuous casting machine with the casting temperature of 650 ℃ and the horizontal continuous casting speed of 800mm/min to obtain a round wire rod blank;
(6) And (3) placing the round wire rod blank in an alloy wire drawing machine to be drawn into a wire with the diameter of 1.38mm at the temperature of 450 ℃ so as to obtain the copper-aluminum alloy wire for the radio-frequency coaxial cable of the network base station.
Example 2
(1) Uniformly mixing 10 parts of cerium metal powder, 30 parts of graphite, 47 parts of NaCl and 5 parts of NaF, reacting for 50min in a vacuum reaction furnace with the vacuum degree of 0.06Pa at 1300 ℃, then soaking for 2h by 82 parts of 1.0mol/L dilute acid solution, flushing with 93 parts of water, and drying to obtain nano cerium carbide;
(2) Filling 40 parts of nano cerium carbide into a smelting crucible, melting 29 parts of nano iron powder to prepare a melt, filling the crucible into a tightly coupled vacuum induction melting furnace, and atomizing and spraying the melt by using an atomizing medium Ar gas when the ambient temperature reaches 800 ℃, wherein the atomizing pressure is 3.0MPa and the atomizing flow is 24m 3/min to prepare the modified nano cerium carbide;
(3) Uniformly mixing 49 parts of 350-mesh Cu and 20 parts of modified nano cerium carbide, placing the mixture in a discharge plasma vacuum sintering furnace, heating to 900 ℃ at 80 ℃ per minute, adding pressure of 25KN, vacuum degree of 8Pa, continuously heating to 700 ℃ at 130 ℃ per hour by introducing argon, heating to 900 ℃ at 80 ℃ per minute by adding 22 parts of 350-mesh Cu-4Al powder and 27 parts of 350-mesh Cu powder, heating to 25 ℃ at 25KN, vacuum degree of 8Pa, continuously heating to 15 minutes, continuously heating to 700 ℃ at 130 ℃ per hour by introducing argon, then heating to 900 ℃ at 80 ℃ per minute by adding 27 parts of Al powder, 22 parts of 350-mesh Cu-4Al powder and 11 parts of modified nano cerium carbide, continuously heating to 25KN at 15 minutes at 80 ℃ per minute, continuously heating to 700 ℃ at 8Pa at 15 minutes by introducing argon, and rapidly heating to 700 ℃ at 130 ℃ per hour by introducing argon, so as to obtain a composite alloy block;
(4) Repeating the step (3) for three times, placing the mixture in a muffle furnace, preserving heat for 40min at 950 ℃ under the protection of argon, and slowly cooling to 650 ℃ at 30 ℃ per hour to obtain a multi-layer composite alloy block;
(5) Casting the multi-layer composite alloy block by a horizontal continuous casting machine with the casting temperature of 700 ℃ and the horizontal continuous casting speed of 1050mm/min to obtain a round wire rod blank;
(6) And (3) placing the round wire rod blank in an alloy wire drawing machine to be drawn into a wire with the diameter of 1.38mm at the temperature of 500 ℃ so as to obtain the copper-aluminum alloy wire for the radio-frequency coaxial cable of the network base station.
Example 3
(1) Uniformly mixing 14 parts of cerium metal powder, 42 parts of graphite, 64 parts of NaCl and 7 parts of NaF, reacting for 70min in a vacuum reaction furnace with the vacuum degree of 0.1Pa at 1500 ℃, then soaking for 3h by 93 parts of 1.5mol/L dilute acid solution, washing with 102 parts of water, and drying to obtain nano cerium carbide;
(2) Filling 56 parts of nano cerium carbide into a smelting crucible, melting 45 parts of nano iron powder to prepare a melt, filling the crucible into a tightly coupled vacuum induction smelting furnace, and atomizing and spraying the melt by using an atomizing medium Ar gas when the ambient temperature reaches 800 ℃, wherein the atomizing pressure is 5.0MPa and the atomizing flow is 18-30m 3/min to prepare the modified nano cerium carbide;
(3) Uniformly mixing 56 parts of 450-mesh Cu and 27 parts of modified nano cerium carbide, placing the mixture in a discharge plasma vacuum sintering furnace, heating to 1000 ℃ at 80 ℃ per minute, adding pressure 25KN, heating to 1000 ℃ at 15Pa of vacuum degree, continuously heating to 20min, introducing argon gas, rapidly cooling to 700 ℃ at 160 ℃ per hour, adding 25 parts of 450-mesh Cu-4Al powder and 31 parts of 2450-mesh Cu powder, heating to 1000 ℃ at 80 ℃ per minute, adding pressure 25KN, heating to 15Pa of vacuum degree, continuously heating to 20min, introducing argon gas, rapidly cooling to 700 ℃ at 160 ℃ per hour, then adding 33 parts of 450-mesh Al powder, 25 parts of 450-mesh Cu-4Al powder and 15 parts of modified nano cerium carbide, heating to 1000 ℃ at 80 ℃ per minute, continuously heating to 25KN, rapidly cooling to 700 ℃ at 160 ℃ per hour, continuously heating to 20min, and introducing argon gas, and rapidly cooling to 700 ℃ at 160 ℃ per hour to obtain a composite alloy block;
(4) Repeating the step (3) for three times, placing the mixture in a muffle furnace, preserving heat for 50min at 1000 ℃ under the protection of argon, and slowly cooling to 650 ℃ at 40 ℃ per hour to obtain a multi-layer composite alloy block;
(5) Casting the multi-layer composite alloy block by a horizontal continuous casting machine with the casting temperature of 750 ℃ and the horizontal continuous casting speed of 1300mm/min to obtain a round wire rod blank;
(6) And (3) placing the round wire rod blank in an alloy wire drawing machine to be drawn into a wire with the diameter of 1.38mm at 550 ℃ so as to obtain the copper-aluminum alloy wire for the radio frequency coaxial cable of the network base station.
Comparative example 1
The difference between comparative example 1 and example 2 is that step (3) is changed in that 22 parts of 350-mesh Cu-4Al powder and 27 parts of 350-mesh Cu powder are heated to 900 ℃ at 80 ℃ per minute, the applied pressure is 25KN, the vacuum degree is 8Pa for 15min, argon gas is introduced to rapidly cool to 700 ℃ at 130 ℃ per hour, then 27 parts of 27-mesh Al powder, 22 parts of 350-mesh Cu-4Al powder and 11 parts of modified nano cerium carbide are added to rapidly cool to 700 ℃ at 80 ℃ per minute, the applied pressure is 25KN, the vacuum degree is 8Pa for 15min, and the argon gas is introduced to rapidly cool to 700 ℃ at 130 ℃ per hour, so that the composite alloy block is obtained. The rest of the procedure is the same as in example 2.
Comparative example 2
The difference between comparative example 2 and example 2 is that in step (3), 49 parts of 350-mesh Cu and 20 parts of modified nano cerium carbide are placed in a discharge plasma vacuum sintering furnace, the temperature is raised to 900 ℃ at 80 ℃ per minute, the external pressure is 25KN, the vacuum degree is 8Pa for 15min, argon is introduced to quickly cool to 700 ℃ at 130 ℃ per hour, 27 parts of 27-mesh Al powder, 22 parts of 350-mesh Cu-4Al powder and 11 parts of modified nano cerium carbide are added to the furnace, the temperature is raised to 900 ℃ at 80 ℃ per minute, the external pressure is 25KN, the vacuum degree is 8Pa for 15min, and the argon is introduced to quickly cool to 700 ℃ at 130 ℃ per hour, so that a composite alloy block is obtained. The rest of the procedure is the same as in example 2.
Comparative example 3
The difference between comparative example 3 and example 2 is that in step (3), 49 parts of 350-mesh Cu and 20 parts of modified nano cerium carbide are placed in a discharge plasma vacuum sintering furnace, the temperature is raised to 900 ℃ at 80 ℃ per minute, the external pressure is 25KN, the vacuum degree is 8Pa for 15min, argon is introduced to quickly cool to 700 ℃ at 130 ℃ per hour, 22 parts of 350-mesh Cu-4Al powder and 27 parts of 350-mesh Cu powder are added, the temperature is raised to 900 ℃ at 80 ℃ per minute, the external pressure is 25KN, the vacuum degree is 8Pa for 15min, and the argon is introduced to quickly cool to 700 ℃ at 130 ℃ per hour, so that a composite alloy block is obtained. The rest of the procedure is the same as in example 2.
Comparative example 4
Comparative example 4 differs from example 2 in that step (4), step (4) was modified by placing the composite alloy block in a muffle furnace under argon atmosphere at 950 ℃ for 40min, and slowly cooling to 650 ℃ at 30 ℃ per hour to form a multi-layered composite alloy block. The rest of the procedure is the same as in example 2.
Comparative example 5
Comparative example 5 differs from example 2 in that step (4), step (4) was repeated three times, and the mixture was placed in a muffle furnace under argon atmosphere at 950 ℃ for 40min, and rapidly cooled to 650 ℃ at 130 ℃ per hour, to obtain a multi-layered composite alloy block. The rest of the procedure is the same as in example 2.
Comparative example 6
Comparative example 6 differs from example 2 in that there is no step (1), step (2) is modified by charging 40 parts of nano cerium carbide into a melting crucible, and melting 29 parts of nano iron powder to obtain a melt, charging the crucible into a tightly coupled vacuum induction melting furnace, and atomizing and spraying the melt with an atomizing medium Ar gas at an atomizing pressure of 3.0MPa and an atomizing flow rate of 24m 3/min when the ambient temperature reaches 800 ℃, thereby obtaining modified nanoparticles. The rest of the procedure is the same as in example 2.
Comparative example 7
Comparative example 7 is different from example 2 in that step (1), step (1) is changed to drying 10 parts of metal cerium powder to prepare nano cerium carbide. The rest of the procedure is the same as in example 2.
Comparative example 8
Comparative example 8 differs from example 2 in that there is no step (2). The rest of the procedure is the same as in example 2.
Effect example
The results of the performance analysis of copper-aluminum alloy wires for network base station rf coaxial cables employing examples 1 to 3 of the present invention and comparative examples 1 to 8 are given in table 1 below.
From comparison of experimental data of examples 1, 2 and 3 and comparative example 1, it can be found that by mixing Cu powder and modified nano cerium carbide for one time sintering, nano cerium carbide fills metal grain boundaries, so that the nano cerium carbide can bear more load; the experimental data comparison of examples 1, 2 and 3 and comparative example 2 shows that the Cu-4Al powder and Cu powder are used as intermediate layers for secondary sintering to form a strengthening phase, which can bear larger load and pressure and improve the strength of the alloy, the experimental data comparison of examples 1, 2 and 3 and comparative example 3 shows that the three times of sintering of Al powder, cu-4Al powder and modified nano cerium carbide can improve the ductility of the alloy, inhibit the growth of crystal grains in the alloy and improve the toughness of the alloy, the experimental data comparison of examples 1, 2 and 3 and comparative example 4 shows that the stacked layered structure formed by repeating the three times of sintering has an excessive interface with double gradient distribution of closely combined elements and layer error energy, which can coordinate multiple deformation mechanisms, relieve stress concentration at the interface and maintain good plasticity, the experimental data comparison of examples 1, 2 and 3 and comparative example 5 shows that continuous and flat oxide films can be formed, the experimental data comparison of examples 1, 2 and 3 and comparative example 6 shows that the melting temperature of the graphite element can be used to form a high-melting-rate graphite film from the experimental surface of cerium oxide film to the comparative example 1, the experimental surface of comparative example 2 and the comparative example 6 can be coated with the experimental data of the comparative example 1 and 2 and comparative example 8 shows that the surface of the graphite can be coated with the experimental surface of cerium powder from the comparative example 1 and the comparative example 2, the double-layer cladding structure is formed, and the double-layer cladding structure can be combined with alloy during firing to enhance the conductivity of the alloy.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The copper-aluminum alloy wire for the network base station radio frequency coaxial cable is characterized by being prepared by carrying out vacuum sintering on modified nano cerium carbide and metal powder for multiple times in a discharge plasma sintering furnace, continuously annealing, rolling and wire drawing.
2. The copper-aluminum alloy wire for the network base station radio frequency coaxial cable according to claim 1, wherein the modified nano cerium carbide is prepared from metal cerium, graphite and nano iron powder.
3. The copper-aluminum alloy wire for a radio frequency coaxial cable of a network base station according to claim 1, wherein the metal powder comprises Cu powder, cu-4Al powder, al powder.
4. The preparation method of the copper-aluminum alloy wire for the network base station radio frequency coaxial cable is characterized by comprising the following preparation steps of:
(1) Uniformly mixing 6-14 parts of metal cerium powder, 18-42 parts of graphite, 30-64 parts of NaCl and 3-7 parts of NaF, placing the mixture in a vacuum reaction furnace for reaction for 30-70 min, then soaking the mixture in 71-93 parts of dilute acid solution for 1-3 h, washing the mixture with 84-102 parts of water, and drying the mixture to obtain nano cerium carbide;
(2) Charging 24-56 parts of nano cerium carbide into a smelting crucible, melting 13-45 parts of nano iron powder to prepare a molten liquid, charging the crucible into a tightly coupled vacuum induction melting furnace, and atomizing and spraying the molten liquid when the ambient temperature reaches 800 ℃ to prepare modified nano cerium carbide;
(3) Uniformly mixing 42-56 parts of Cu and 13-27 parts of modified nano cerium carbide, placing the mixture into a discharge plasma vacuum sintering furnace, heating to 800-1000 ℃ at a certain rate, adding pressure 25KN, continuously heating to 800-1000 ℃ at a certain rate, introducing argon gas, rapidly cooling, adding 19-25 parts of Cu-4Al powder and 23-31 parts of Cu powder, heating to 800-1000 ℃ at a certain rate, adding pressure 25KN, continuously heating to 10-20 min, introducing argon gas, rapidly cooling, then adding 21-33 parts of Al powder, 19-25 parts of Cu-4Al powder and 7-15 parts of modified nano cerium carbide, heating to 800-1000 ℃ at a certain rate, adding pressure 25KN, continuously heating to 10-20 min, and introducing argon gas, rapidly cooling to obtain a composite alloy block;
(4) Repeating the step (3) for three times, placing the mixture in a muffle furnace, preserving heat for 30-50 min under the protection of argon, and slowly cooling to 650 ℃ to obtain a multi-layer composite alloy block;
(5) Casting the multi-layer composite alloy block by a horizontal continuous casting machine with the casting temperature of 650-750 ℃ and the horizontal continuous casting speed of 800-1300 mm/min to obtain a round wire rod blank;
(6) And (3) placing the round wire rod blank in an alloy wire drawing machine to be drawn into a wire with the diameter of 1.38mm at the temperature of 450-550 ℃ so as to obtain the copper-aluminum alloy wire for the radio frequency coaxial cable of the network base station.
5. The method for preparing the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is disclosed in claim 4, is characterized in that the temperature of the vacuum reaction furnace in the step (1) is 1100-1500 ℃, the vacuum degree is 0.01-0.1 Pa, and the dilute acid solution is 0.5-1.5 mol/L sulfuric acid solution.
6. The method for preparing the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is disclosed in claim 4, is characterized in that the atomization spraying condition in the step (2) is that an atomization medium Ar gas is atomized, the atomization pressure is 1.0-5.0 MPa, and the atomization flow is 18-30m3/min.
7. The method for preparing the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is disclosed in claim 4, is characterized in that the particle size of the Cu powder, the Cu-4Al powder and the Al powder in the step (3) is 250-450 meshes.
8. The method for manufacturing the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is disclosed in claim 4, is characterized in that the vacuum degree of the spark plasma vacuum sintering furnace in the step (3) is 1-15 Pa.
9. The method for preparing the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is disclosed in claim 4, is characterized in that the heating rate in the step (3) is 80 ℃ per minute, the rapid cooling is 100-160 ℃ per hour, and the temperature is reduced to 700 ℃.
10. The method for preparing the copper-aluminum alloy wire for the network base station radio frequency coaxial cable, which is disclosed in claim 4, is characterized in that the heat preservation temperature in the step (4) is 900-1000 ℃, and the slow cooling is 20-40 ℃ per hour.
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|---|---|---|---|---|
| GB1398128A (en) * | 1971-06-07 | 1975-06-18 | Southwire Co | Aluminum alloy electrically conductive body |
| CN101054654A (en) * | 2006-04-11 | 2007-10-17 | 中国科学院金属研究所 | High-strength high-conductivity oxidation-resisting low-silver copper-base alloy and preparation thereof |
| CN106244844A (en) * | 2016-08-29 | 2016-12-21 | 芜湖楚江合金铜材有限公司 | A kind of copper cash of quasiconductor and preparation method thereof |
| CN111621664A (en) * | 2020-06-04 | 2020-09-04 | 西安斯瑞先进铜合金科技有限公司 | Method for preparing copper-iron alloy by spark plasma sintering |
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- 2024-09-18 CN CN202411298988.4A patent/CN119092210A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1398128A (en) * | 1971-06-07 | 1975-06-18 | Southwire Co | Aluminum alloy electrically conductive body |
| CN101054654A (en) * | 2006-04-11 | 2007-10-17 | 中国科学院金属研究所 | High-strength high-conductivity oxidation-resisting low-silver copper-base alloy and preparation thereof |
| CN106244844A (en) * | 2016-08-29 | 2016-12-21 | 芜湖楚江合金铜材有限公司 | A kind of copper cash of quasiconductor and preparation method thereof |
| CN111621664A (en) * | 2020-06-04 | 2020-09-04 | 西安斯瑞先进铜合金科技有限公司 | Method for preparing copper-iron alloy by spark plasma sintering |
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