High-conductivity aluminum alloy wire and method of making same

Abstract

The application discloses a kind of high-conductivity aluminum alloy wire and preparation method thereof, including following weight percentage of element: B is 0.01-0.05%, Si is 0.1-0.3%, Fe is 0.1-0.25%, Zn is 0.01-0.05%, Tb is 0.001-0.005%, Ce is 0.005-0.02%, V is 0.001-0.005%, Ti is 0.001-0.005%, Zr is 0.01-0.05%, Er is 0.001-0.005%, the rest is Al;The beneficial effect of the application is: B and the compound formed by Si are dispersed in aluminum alloy matrix, effectively refine grain, reduce the influence of electron scattering on grain boundary, so as to significantly improve the conductivity of aluminum alloy wire, can effectively reduce the power loss of power transmission line, improve transmission efficiency;Tb, Ce, Er and other rare earth elements interact with Fe, Zn and other elements, improve the crystal structure of alloy, strengthen the grain boundary binding force, so that aluminum alloy wire has excellent tensile strength, elongation and fatigue life, can better adapt to complex power transmission environment, improve the reliability and stability of power transmission line.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy conductor technology, specifically relating to a high conductivity aluminum alloy conductor and its preparation method. Background Technology

[0002] Aluminum alloy conductors, as conductive materials made from aluminum with the addition of one or more alloying elements, maintain the high conductivity of aluminum while effectively improving mechanical properties, heat resistance, and creep resistance through alloying compared to pure aluminum conductors. This allows them to adapt to more complex power transmission environments and higher usage requirements. Against the backdrop of continuously growing global electricity demand, long-distance, high-capacity power transmission places increasingly stringent demands on the conductivity and mechanical strength of conductor materials.

[0003] In the prior art, patent publication number CN108893660B discloses a high-conductivity aluminum alloy wire and its preparation method. The aluminum alloy wire comprises elements in specific weight percentages, such as Mg 1.15-1.28%, Si 1.21-1.35%, Zr 0.33-0.42%, Y 0.11-0.15%, Ce 0.25-0.33%, La 0.06-0.17%, B 0.41-0.55%, Cu 0.61-0.85%, other impurities less than 0.3%, and the balance being Al. Aluminum alloy wires are prepared through specific steps, including dehumidifying aluminum blocks, sequentially adding elements and melting in a vacuum melting furnace, testing, casting, rolling, heat treatment, and wire drawing. However, this existing technology still has room for improvement in terms of further increasing the conductivity of aluminum alloy wires, as well as optimizing tensile strength, elongation, and fatigue characteristics. With the development of the power industry, the demand for aluminum alloy wires with superior comprehensive performance on the basis of high conductivity is becoming increasingly urgent. Therefore, developing a new high-conductivity aluminum alloy wire and its preparation method is of great practical significance. Summary of the Invention

[0004] The purpose of this invention is to provide a high conductivity aluminum alloy wire and its preparation method, thereby solving the problem that the comprehensive performance of aluminum alloy wires in the prior art needs to be further improved in terms of conductivity, tensile strength, elongation and fatigue characteristics.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high conductivity aluminum alloy wire, comprising the following elements by weight percentage: B 0.01-0.05%, Si 0.1-0.3%, Fe 0.1-0.25%, Zn 0.01-0.05%, Tb 0.001-0.005%, Ce 0.005-0.02%, V 0.001-0.005%, Ti 0.001-0.005%, Zr 0.01-0.05%, Er 0.001-0.005%, with the remainder being Al.

[0006] As a preferred embodiment of the present invention, the microstructure of the aluminum alloy wire has uniform grain size, with an average grain size of 10-30 μm.

[0007] A method for preparing a high conductivity aluminum alloy wire includes the following steps:

[0008] Based on the composition and mass percentage of the aluminum alloy conductor, aluminum ingots with a purity of ≥99.7% are selected as the aluminum source, and aluminum-iron alloy, aluminum-silicon alloy, aluminum-zinc alloy, aluminum-terbium alloy, aluminum-cerium alloy, aluminum-vanadium alloy, aluminum-titanium alloy, aluminum-zirconium alloy, and aluminum-erbium alloy are used as the corresponding element addition sources for the formulation.

[0009] The aluminum source is heated and melted in a regenerative gas-fired aluminum melting furnace at 700-720℃, and then the molten aluminum is transferred to a tilting holding furnace with permanent magnet stirring function.

[0010] All alloying elements other than B are added to the tilting holding furnace and heated to melt into aluminum alloy liquid. Then, the permanent magnet stirring device is turned on to stir the aluminum alloy liquid.

[0011] The aluminum alloy liquid in the tilting holding furnace is subjected to the first degassing and impurity removal treatment by spraying and refining with inert gas and refining agent;

[0012] The aluminum alloy liquid in the tilting holding furnace is sprayed with inert gas and refining agent to carry out a second degassing and impurity removal treatment.

[0013] The molten aluminum alloy in the furnace is introduced into the flow channel, and aluminum-boron alloy rods accounting for 0.2-0.4% of the weight of the molten aluminum alloy are added to refine the grains of the molten aluminum alloy.

[0014] The molten aluminum alloy is flowed through a dual-rotor degassing chamber mounted on a flow channel for online degassing outside the furnace. The dual-rotor degassing chamber contains two graphite rotors, each rotating at 400-500 r / min, with a gas flow rate of 3-4 m³ / min on each rotor. 3 / h, gas pressure is 0.5-1MPa;

[0015] The molten aluminum alloy is filtered outside the furnace by passing through a double-filter plate filter box set on the flow channel.

[0016] The molten aluminum alloy flows into a continuous casting machine and is continuously cast into an aluminum alloy continuous casting billet. The temperature of the molten aluminum alloy is 700-710℃.

[0017] The aluminum alloy continuous casting billet is heated to 470-480℃ by passing it through a medium-frequency induction heater;

[0018] The aluminum alloy continuous casting billet is fed into a continuous rolling mill and continuously rolled into an aluminum alloy round bar with a diameter of 9.5 mm, and then cooled to room temperature;

[0019] The aluminum alloy round rod is drawn into an aluminum alloy wire of the required diameter. During the drawing process, the drawing speed is controlled at 2-3 m / s and the temperature of the drawing lubricant is 40-50℃.

[0020] The drawn aluminum alloy wires are subjected to aging treatment at a temperature of 180-200℃ for 4-6 hours.

[0021] As a preferred technical solution of the present invention, the permanent magnet stirring device is turned on to stir the aluminum alloy liquid. The stirring method is to rotate forward for 1 minute and then reverse for 1 minute, and then repeat the stirring for 15-25 minutes.

[0022] As a preferred technical solution of the present invention, the aluminum alloy liquid in the tilting holding furnace is subjected to a first degassing and impurity removal treatment by spraying and refining with inert gas and refining agent. The inert gas is argon with a purity of ≥99.99%. The temperature of the aluminum alloy liquid during refining is 710-730℃. The amount of refining agent is 0.1-0.2% of the weight of the aluminum alloy liquid. The spraying and refining time is 15-20 minutes. After refining, slag is removed, and then the aluminum alloy liquid is allowed to stand for 30-40 minutes.

[0023] As a preferred embodiment of the present invention, the gas flow rate on each graphite rotor is 3-4 m³ / h. 3 / h, the gas pressure is 0.5-1MPa, the gas is a mixture of argon with a purity ≥99.9% and chlorine with a purity ≥99.9%, wherein the volume percentage of chlorine is 5-10%.

[0024] As a preferred technical solution of the present invention, the dual-filter plate filter box is provided with two foam ceramic filter plates with a front 40 mesh and a rear 80 mesh.

[0025] As a preferred technical solution of the present invention, the linear speed of the crystallizing wheel of the continuous casting machine is 18-20 m / min.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The compound formed by B and Si is dispersed in the aluminum alloy matrix, effectively refining the grains and reducing the influence of grain boundaries on electron scattering, thereby significantly improving the conductivity of aluminum alloy wires, effectively reducing power loss in transmission lines and improving power transmission efficiency.

[0028] Rare earth elements such as Tb, Ce, and Er interact with elements such as Fe and Zn, improving the crystal structure of the alloy and enhancing grain boundary bonding. This gives the aluminum alloy conductor excellent tensile strength, elongation, and fatigue life, enabling it to better adapt to complex power transmission environments and improve the reliability and stability of transmission lines. The multi-stage refining, degassing, filtration, and grain refinement processes in the preparation method result in uniform grain size and clear grain boundaries in the microstructure of the aluminum alloy conductor. The precipitated phases are evenly distributed at the grain boundaries and within the grains, providing a microstructural basis for its excellent comprehensive performance.

[0029] Anodizing the aluminum alloy wires after drawing effectively improves their corrosion resistance, extends their service life in harsh environments such as outdoors, and reduces maintenance costs.

[0030] During the preparation process, strict parameter control is implemented at each stage, and comprehensive quality testing is conducted after aging treatment. This ensures the quality stability and reliability of the final product, improves the product qualification rate, and facilitates large-scale production and application. Attached Figure Description

[0031] Figure 1 This is a flowchart of the method for preparing high conductivity aluminum alloy wires according to the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Please see Figure 1 This is the first embodiment of the present invention, which provides a high conductivity aluminum alloy wire comprising the following elements by weight percentage: B 0.01%, Si 0.1%, Fe 0.1%, Zn 0.01%, Tb 0.001%, Ce 0.005%, V 0.001%, Ti 0.001%, Zr 0.01%, Er 0.001%, with the remainder being Al.

[0035] In this embodiment, preferably, the microstructure of the aluminum alloy wire has uniform grain size with an average grain size of 10 μm.

[0036] A method for preparing a high conductivity aluminum alloy wire includes the following steps:

[0037] Based on the composition and mass percentage of the aluminum alloy conductor, aluminum ingots with a purity of ≥99.7% are selected as the aluminum source, and aluminum-iron alloy, aluminum-silicon alloy, aluminum-zinc alloy, aluminum-terbium alloy, aluminum-cerium alloy, aluminum-vanadium alloy, aluminum-titanium alloy, aluminum-zirconium alloy, and aluminum-erbium alloy are used as the corresponding element addition sources for the formulation.

[0038] The aluminum source is heated and melted at 700°C in a regenerative gas-fired aluminum melting furnace, and then the molten aluminum is transferred to a tilting holding furnace with permanent magnet stirring function.

[0039] All alloying elements other than B are added to the tilting holding furnace and heated to melt into aluminum alloy liquid. Then, the permanent magnet stirring device is turned on to stir the aluminum alloy liquid. The stirring method is to rotate forward for 1 minute and then reverse for 1 minute, and then repeat the stirring for 15 minutes.

[0040] The aluminum alloy liquid in the tilting holding furnace was subjected to the first degassing and impurity removal treatment by spraying and refining with inert gas and refining agent. The inert gas was argon with a purity of ≥99.99%. The temperature of the aluminum alloy liquid during refining was 710℃. The amount of refining agent accounted for 0.1% of the weight of the aluminum alloy liquid. The spraying and refining time was 15min. After refining, the slag was removed and the aluminum alloy liquid was allowed to stand for 30min.

[0041] The aluminum alloy liquid in the tilting holding furnace is sprayed with inert gas and refining agent to carry out a second degassing and impurity removal treatment.

[0042] The molten aluminum alloy in the furnace is introduced into the flow channel, and an aluminum-boron alloy rod accounting for 0.2% of the weight of the molten aluminum alloy is added to refine the grains of the molten aluminum alloy.

[0043] The molten aluminum alloy is flowed through a dual-rotor degassing chamber mounted on a flow channel for online degassing outside the furnace. The dual-rotor degassing chamber contains two graphite rotors, each rotating at 400 r / min, with a gas flow rate of 3 m³ / min per rotor. 3 / h, the gas pressure is 0.5MPa, the gas is a mixture of argon with a purity ≥99.9% and chlorine with a purity ≥99.9%, wherein the volume percentage of chlorine is 5%;

[0044] The aluminum alloy liquid is filtered outside the furnace by passing through a double filter plate filter box set on the flow channel. The double filter plate filter box is equipped with two foam ceramic filter plates with a front 40 mesh and a rear 80 mesh.

[0045] The molten aluminum alloy is poured into a continuous casting machine and continuously cast into an aluminum alloy continuous casting billet. The temperature of the molten aluminum alloy is 700℃; the linear speed of the crystallizing wheel of the continuous casting machine is 18m / min.

[0046] The aluminum alloy continuous casting billet is heated to 470°C by passing it through a medium-frequency induction heater;

[0047] The aluminum alloy continuous casting billet is fed into a continuous rolling mill and continuously rolled into an aluminum alloy round bar with a diameter of 9.5 mm, and then cooled to room temperature;

[0048] The aluminum alloy round rod is drawn into an aluminum alloy wire of the required diameter. During the drawing process, the drawing speed is controlled at 2m / s and the temperature of the drawing lubricant is 40℃.

[0049] The drawn aluminum alloy wires were subjected to aging treatment at a temperature of 180℃ for 4 hours.

[0050] Example 2

[0051] Please see Figure 1 This is a second embodiment of the present invention, which provides a high conductivity aluminum alloy wire comprising the following elements by weight percentage: B 0.03%, Si 0.2%, Fe 0.18%, Zn 0.03%, Tb 0.003%, Ce 0.01%, V 0.003%, Ti 0.003%, Zr 0.03%, Er 0.003%, with the remainder being Al.

[0052] In this embodiment, preferably, the microstructure of the aluminum alloy wire has uniform grain size with an average grain size of 20 μm.

[0053] A method for preparing a high conductivity aluminum alloy wire includes the following steps:

[0054] Based on the composition and mass percentage of the aluminum alloy conductor, aluminum ingots with a purity of ≥99.7% are selected as the aluminum source, and aluminum-iron alloy, aluminum-silicon alloy, aluminum-zinc alloy, aluminum-terbium alloy, aluminum-cerium alloy, aluminum-vanadium alloy, aluminum-titanium alloy, aluminum-zirconium alloy, and aluminum-erbium alloy are used as the corresponding element addition sources for the formulation.

[0055] The aluminum source is heated and melted at 710°C in a regenerative gas-fired aluminum melting furnace, and then the molten aluminum is transferred to a tilting holding furnace with permanent magnet stirring function.

[0056] All alloying elements other than B are added to the tilting holding furnace and heated to melt into aluminum alloy liquid. Then, the permanent magnet stirring device is turned on to stir the aluminum alloy liquid. The stirring method is to rotate forward for 1 minute and then reverse for 1 minute, and then repeat the stirring for 20 minutes.

[0057] The aluminum alloy liquid in the tilting holding furnace was subjected to the first degassing and impurity removal treatment by spraying and refining with inert gas and refining agent. The inert gas was argon with a purity of ≥99.99%. The temperature of the aluminum alloy liquid during refining was 720℃. The amount of refining agent accounted for 0.15% of the weight of the aluminum alloy liquid. The spraying and refining time was 18 minutes. After refining, the slag was removed and the aluminum alloy liquid was then allowed to stand for 35 minutes.

[0058] The aluminum alloy liquid in the tilting holding furnace is sprayed with inert gas and refining agent to carry out a second degassing and impurity removal treatment.

[0059] The molten aluminum alloy in the furnace is introduced into the flow channel, and an aluminum-boron alloy rod accounting for 0.3% of the weight of the molten aluminum alloy is added to refine the grains of the molten aluminum alloy.

[0060] The molten aluminum alloy is flowed through a dual-rotor degassing chamber mounted on a flow channel for online degassing outside the furnace. The dual-rotor degassing chamber contains two graphite rotors, each rotating at 450 r / min, with a gas flow rate of 3.5 m³ / min per rotor. 3 / h, the gas pressure is 0.8MPa, the gas is a mixture of argon with a purity ≥99.9% and chlorine with a purity ≥99.9%, wherein the volume percentage of chlorine is 8%;

[0061] The aluminum alloy liquid is filtered outside the furnace by passing through a double filter plate filter box set on the flow channel. The double filter plate filter box is equipped with two foam ceramic filter plates with a front 40 mesh and a rear 80 mesh.

[0062] The molten aluminum alloy is poured into a continuous casting machine and continuously cast into an aluminum alloy continuous casting billet. The temperature of the molten aluminum alloy is 705℃; the linear speed of the crystallizing wheel of the continuous casting machine is 19m / min.

[0063] The aluminum alloy continuous casting billet is heated to 475°C by passing it through a medium-frequency induction heater;

[0064] The aluminum alloy continuous casting billet is fed into a continuous rolling mill and continuously rolled into an aluminum alloy round bar with a diameter of 9.5 mm, and then cooled to room temperature;

[0065] The aluminum alloy round rod is drawn into an aluminum alloy wire of the required diameter. During the drawing process, the drawing speed is controlled at 2.5 m / s and the temperature of the drawing lubricant is 45℃.

[0066] The drawn aluminum alloy wires were subjected to aging treatment at a temperature of 190℃ for 5 hours.

[0067] Example 3

[0068] Please see Figure 1This is the third embodiment of the present invention, which provides a high conductivity aluminum alloy wire comprising the following elements by weight percentage: B 0.05%, Si 0.3%, Fe 0.25%, Zn 0.05%, Tb 0.005%, Ce 0.02%, V 0.005%, Ti 0.005%, Zr 0.05%, Er 0.005%, with the remainder being Al.

[0069] In this embodiment, preferably, the microstructure of the aluminum alloy wire has uniform grain size with an average grain size of 30 μm.

[0070] A method for preparing a high conductivity aluminum alloy wire includes the following steps:

[0071] Based on the composition and mass percentage of the aluminum alloy conductor, aluminum ingots with a purity of ≥99.7% are selected as the aluminum source, and aluminum-iron alloy, aluminum-silicon alloy, aluminum-zinc alloy, aluminum-terbium alloy, aluminum-cerium alloy, aluminum-vanadium alloy, aluminum-titanium alloy, aluminum-zirconium alloy, and aluminum-erbium alloy are used as the corresponding element addition sources for the formulation.

[0072] The aluminum source is heated and melted at 720°C in a regenerative gas-fired aluminum melting furnace, and then the molten aluminum is transferred to a tilting holding furnace with permanent magnet stirring function.

[0073] All alloying elements other than B are added to the tilting holding furnace and heated to melt into aluminum alloy liquid. Then, the permanent magnet stirring device is turned on to stir the aluminum alloy liquid. The stirring method is to rotate forward for 1 minute and then reverse for 1 minute, and then repeat the stirring for 25 minutes.

[0074] The aluminum alloy liquid in the tilting holding furnace was subjected to the first degassing and impurity removal treatment by spraying and refining with inert gas and refining agent. The inert gas was argon with a purity of ≥99.99%. The temperature of the aluminum alloy liquid during refining was 730℃. The amount of refining agent accounted for 0.2% of the weight of the aluminum alloy liquid. The spraying and refining time was 20 minutes. After refining, the slag was removed and the aluminum alloy liquid was allowed to stand for 40 minutes.

[0075] The aluminum alloy liquid in the tilting holding furnace is sprayed with inert gas and refining agent to carry out a second degassing and impurity removal treatment.

[0076] The molten aluminum alloy in the furnace is introduced into the flow channel, and an aluminum-boron alloy rod accounting for 0.4% of the weight of the molten aluminum alloy is added to refine the grains of the molten aluminum alloy.

[0077] The molten aluminum alloy is flowed through a dual-rotor degassing chamber mounted on a flow channel for online degassing outside the furnace. The dual-rotor degassing chamber contains two graphite rotors, each rotating at 500 r / min, with a gas flow rate of 4 m³ / min per rotor. 3 / h, the gas pressure is 1MPa, the gas is a mixture of argon with a purity ≥99.9% and chlorine with a purity ≥99.9%, wherein the volume percentage of chlorine is 10%;

[0078] The aluminum alloy liquid is filtered outside the furnace by passing through a double filter plate filter box set on the flow channel. The double filter plate filter box is equipped with two foam ceramic filter plates with a front 40 mesh and a rear 80 mesh.

[0079] The molten aluminum alloy is poured into a continuous casting machine and continuously cast into an aluminum alloy continuous casting billet. The temperature of the molten aluminum alloy is 710℃; the linear speed of the crystallizing wheel of the continuous casting machine is 20m / min.

[0080] The aluminum alloy continuous casting billet is heated to 480°C by passing it through a medium-frequency induction heater;

[0081] The aluminum alloy continuous casting billet is fed into a continuous rolling mill and continuously rolled into an aluminum alloy round bar with a diameter of 9.5 mm, and then cooled to room temperature;

[0082] The aluminum alloy round rod is drawn into an aluminum alloy wire of the required diameter. During the drawing process, the drawing speed is controlled at 3m / s and the temperature of the drawing lubricant is 50℃.

[0083] The drawn aluminum alloy wires were subjected to aging treatment at a temperature of 200℃ for 6 hours.

[0084] The following is a performance comparison table between the high conductivity aluminum alloy wire of this invention and the prior art patent (CN108893660B):

[0085] Table 1: Comparison of Basic Performance

[0086]

[0087]

[0088] Table 2: Grain size distribution

[0089] Size range (μm) Frequency of this invention (%) Comparison of patent frequency (%) 10-20 42 5 20-30 38 15 30-40 12 25 40-50 6 35 >50 2 20

[0090] Table 3: Overall Performance Rating (out of 100)

[0091] Performance dimension This invention rating Comparison of patent scores Leading margin conductivity 95 82 +13 tensile strength 90 83 +7 elongation 88 75 +13 Fatigue life 92 78 +14 Corrosion resistance* 85 70 +15 Overall score 90 77.6 +12.4

[0092] Although embodiments of the invention have been shown and described in detail above, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high conductivity aluminum alloy wire, characterized by: The aluminum alloy conductor comprises the following elements by weight percentage: B 0.01-0.05%, Si 0.1-0.3%, Fe 0.1-0.25%, Zn 0.01-0.05%, Tb 0.001-0.005%, Ce 0.005-0.02%, V 0.001-0.005%, Ti 0.001-0.005%, Zr 0.01-0.05%, Er 0.001-0.005%, with the remainder being Al; the microstructure of the aluminum alloy conductor exhibits uniform grain size with an average grain size of 10-30 μm.

2. The method of claim 1, wherein the high conductivity aluminum alloy wire is prepared by the steps of: Includes the following steps: ​ Based on the composition and mass percentage of the aluminum alloy conductor, aluminum ingots with a purity of ≥99.7% are selected as the aluminum source, and aluminum-iron alloy, aluminum-silicon alloy, aluminum-zinc alloy, aluminum-terbium alloy, aluminum-cerium alloy, aluminum-vanadium alloy, aluminum-titanium alloy, aluminum-zirconium alloy, and aluminum-erbium alloy are used as the corresponding element addition sources for the formulation. The aluminum source is heated and melted in a regenerative gas-fired aluminum melting furnace at 700-720℃, and then the molten aluminum is transferred to a tilting holding furnace with permanent magnet stirring function. All alloying elements other than B are added to the tilting holding furnace and heated to melt into aluminum alloy liquid. Then, the permanent magnet stirring device is turned on to stir the aluminum alloy liquid. The aluminum alloy liquid in the tilting holding furnace is subjected to the first degassing and impurity removal treatment by spraying and refining with inert gas and refining agent; The aluminum alloy liquid in the tilting holding furnace is sprayed with inert gas and refining agent to carry out a second degassing and impurity removal treatment. The molten aluminum alloy in the furnace is introduced into the flow channel, and aluminum-boron alloy rods accounting for 0.2-0.4% of the weight of the molten aluminum alloy are added to refine the grains of the molten aluminum alloy. The molten aluminum alloy is flowed through a dual-rotor degassing chamber mounted on a flow channel for online degassing outside the furnace. The dual-rotor degassing chamber contains two graphite rotors, each rotating at 400-500 r / min, with a gas flow rate of 3-4 m³ / min on each rotor. 3 / h, gas pressure is 0.5-1MPa; The molten aluminum alloy is filtered outside the furnace by passing through a double-filter plate filter box set on the flow channel. The molten aluminum alloy flows into a continuous casting machine and is continuously cast into an aluminum alloy continuous casting billet. The temperature of the molten aluminum alloy is 700-710℃. The aluminum alloy continuous casting billet is heated to 470-480℃ by passing it through a medium-frequency induction heater; The aluminum alloy continuous casting billet is fed into a continuous rolling mill and continuously rolled into an aluminum alloy round bar with a diameter of 9.5 mm, and then cooled to room temperature; The aluminum alloy round rod is drawn into an aluminum alloy wire of the required diameter. During the drawing process, the drawing speed is controlled at 2-3 m / s and the temperature of the drawing lubricant is 40-50℃. The drawn aluminum alloy wires are subjected to aging treatment at a temperature of 180-200℃ for 4-6 hours.

3. The method of claim 2, wherein the high conductivity aluminum alloy wire is prepared by the steps of: Turn on the permanent magnet stirrer to stir the aluminum alloy liquid. The stirring method is to rotate forward for 1 minute and then reverse for 1 minute, and then repeat this stirring cycle for 15-25 minutes. ​ 4. The method of claim 2, wherein the high conductivity aluminum alloy wire is prepared by the steps of: The aluminum alloy liquid in the tilting holding furnace is subjected to the first degassing and impurity removal treatment by spraying inert gas and refining agent. The inert gas is argon with a purity of ≥99.99%. The temperature of the aluminum alloy liquid during refining is 710-730℃. The amount of refining agent is 0.1-0.2% of the weight of the aluminum alloy liquid. The spraying refining time is 15-20 minutes. After refining, slag is removed and the aluminum alloy liquid is then allowed to stand for 30-40 minutes. ​ 5. The method of claim 2, wherein the high conductivity aluminum alloy wire is prepared by the steps of: The gas flow rate on each graphite rotor is 3-4 m³ / s. 3 / h, the gas pressure is 0.5-1MPa, the gas is a mixture of argon with a purity ≥99.9% and chlorine with a purity ≥99.9%, wherein the volume percentage of chlorine is 5-10%. ​ 6. The method of claim 2, wherein the high conductivity aluminum alloy wire is prepared by the steps of: The dual-filter box contains two foam ceramic filter plates with a front mesh size of 40 mesh and a rear mesh size of 80 mesh. ​ 7. The method of claim 2, wherein the high conductivity aluminum alloy wire is prepared by the steps of: The linear speed of the crystallizing wheel of the continuous casting machine is 18-20 m / min. ​

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