8030 aluminum alloy wire and preparation process thereof

Abstract

This invention belongs to the field of aluminum alloy conductive material preparation technology, and discloses an 8030 aluminum alloy wire and its preparation process. The composition and mass percentage of the 8030 aluminum alloy are: Fe 0.6-0.75%, Cu 0.2-0.25%, Ce 0.05-0.3%, B 0.001-0.04%, Zn 0.01-0.05%, Mg 0.003-0.005%, Si≤0.1%, impurity element content≤0.05%, and the balance is aluminum. This invention achieves a synergistic increase in conductivity, tensile strength, and elongation of the 8030 aluminum alloy through multi-scale control of alloy composition, boronizing process, and rare earth addition process.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy conductive material preparation technology, and in particular to an 8030 aluminum alloy wire and its preparation process. Background Technology

[0002] Electric wires and cables are widely used in construction, power, machinery manufacturing, new energy, and communications industries, serving as the "blood vessels" of the national economy. With rapid economic development, my country has become the largest producer of power cables, and power cables have become a major supporting industry in the national economy. Aluminum alloy cables have advantages such as low density, good conductivity, and low price; their weight is only half that of copper for the same current carrying capacity. Therefore, using aluminum alloy cables instead of copper cables can significantly reduce cable weight, thereby reducing the difficulty and cost of cable laying. More importantly, compared to copper, my country has abundant aluminum ore resources and sufficient production capacity. Currently, "replacing copper with aluminum" has become a development trend in the electric wire and cable industry.

[0003] In 1968, Southwire invented aluminum alloy cable, which is widely used in construction, power and other fields. The invention of this product has led to nearly 50 years of safe, accident-free and successful application of aluminum alloy cable in North America and other countries.

[0004] Aluminum alloy conductors are alloy materials formed by adding various elements such as copper, iron, zinc, silicon, manganese, and magnesium to aluminum metal to meet the requirements of strength, tensile strength, flexibility, and corrosion resistance. They are an emerging type of conductor with advantages such as light weight, low price, small bending radius, and relatively high conductivity.

[0005] Chinese invention patent CN118957364A discloses a high-conductivity, heat-resistant, and high-elongation aluminum alloy wire and its applications. The method specifies the composition as follows: Zr 0.065-0.075%, Er 0.11-0.14%, B 0.032-0.038%, Fe 0.040-0.048%, Si 0.041-0.045%, (V+Ti+Cr+Mn) 0.012-0.018%, with the balance being aluminum. Through the design of the alloy composition, continuous casting and rolling process, and intermediate annealing process, heat-resistant dispersed phase particles are uniformly precipitated in the alloy during intermediate annealing, thereby improving the heat resistance of the aluminum alloy. The work hardening produced by the aluminum alloy wire rod is annealed and recovered online in a timely manner by differential temperature drawing, which reduces the traditional offline annealing process and is conducive to the continuity of drawing. Combined with a deep cryogenic drawing process, the shape of the finished wire is fully corrected and the surface quality is improved. Then, the conductivity, strength and elongation are adjusted by finished annealing. Finally, through the synergistic effect of the mechanism, the aluminum alloy wire is endowed with high conductivity, high elongation and heat resistance.

[0006] Chinese invention patent CN 105950896A discloses a high-conductivity, high-mechanical-performance 8030 aluminum alloy electrical round rod and its preparation method. The invention relates to the field of 8030 series electrical round aluminum rods and their preparation. Its key feature is that the composition by mass fraction is: Si≤0.1%, Fe0.3%-0.8%, Mg≤0.05%, Zn≤0.05%, B0.001%-0.04%, rare earth oxide La2O30.2%-0.4%, Cu0.4%-0.9%, with the balance being Al. The strength of the 8030 aluminum alloy is mainly improved by adding rare earth oxides and increasing the Cu content. However, this method reduces the elongation of the alloy. Furthermore, the limiting solubility of Cu in aluminum is as high as 5.65%. Increasing the Cu content increases the number of Cu atoms existing in the aluminum matrix in solid solution form, thereby leading to a decrease in conductivity.

[0007] In aluminum alloy conductors, higher alloy element content results in lower conductivity, more pronounced work hardening, higher strength, and poorer ductility. Conversely, lower alloy element content increases conductivity but decreases tensile strength, elongation, bending radius, and creep resistance. Summary of the Invention

[0008] The purpose of this invention is to solve the problem that the conductivity, strength and elongation of 8030 aluminum alloy cannot meet the requirements at the same time. By optimizing the alloy composition, purifying the melt and adding rare earth elements, the tensile strength, elongation and conductivity of 8030 aluminum alloy wires are synergistically improved, thereby providing an 8030 aluminum alloy wire and its preparation process.

[0009] To overcome the shortcomings of the prior art, the technical solution adopted in this invention is as follows:

[0010] An 8030 aluminum alloy wire, wherein the composition and mass percentage of the 8030 aluminum alloy are: Fe 0.6-0.75%, Cu 0.2-0.25%, Ce 0.05-0.3%, B 0.001-0.04%, Zn 0.01-0.05%, Mg 0.003-0.005%, Si≤0.1%, impurity element content≤0.05%, and the balance being aluminum.

[0011] Fe is added in the form of an Al-10Fe master alloy, primarily to improve the tensile strength and creep resistance of the 8030 aluminum alloy conductor. Fe has extremely low solubility in aluminum and generally exists as a second phase in the aluminum matrix, thus increasing alloy strength without reducing conductivity. Furthermore, Al3Fe has a complex, bottom-centered monoclinic structure, with Al-Fe bonds having a bonding strength approximately five times that of α-Al, giving the alloy excellent creep resistance.

[0012] Cu is added in the form of pure Cu, and its main function is to improve the strength of 8030 aluminum alloy wires. Cu has a high solubility in aluminum, existing in the aluminum matrix in large quantities as a solid solution and in small quantities as the Al2Cu phase, which is beneficial to improving the strength of the alloy.

[0013] Boron (B) is added in the form of an Al-3B master alloy. Its main function is to reduce the content of impurity elements such as Ti, V, Cr, and Mn in the alloy, thereby improving the alloy's conductivity. When an appropriate amount of B is added to the aluminum melt, it reacts with elements such as Ti, V, Cr, and Mn to form borides, which are then removed through sedimentation and slag removal, thereby reducing scattering during electron propagation and improving the alloy's conductivity.

[0014] Ce is added in the form of an Al-10Ce master alloy. Its main function is to reduce the presence of Fe in solid solution and limit the growth of the Al3Fe phase, thereby improving the conductivity and elongation of the alloy. The addition of rare earth Ce can react with the aluminum-iron phase to form iron-containing rare earth compounds, which can limit the growth of the Al3Fe phase and the diffusion of Fe into the matrix during solidification.

[0015] Another aspect of the present invention provides a manufacturing process for 8030 aluminum alloy wire, characterized by comprising the following steps:

[0016] Step 1: Analyze the composition of aluminum ingots and prepare raw materials according to the mass percentage of alloy components;

[0017] Step 2: Put industrial pure aluminum into the aluminum melting furnace and sprinkle a covering agent. After melting, raise the temperature to 730-760℃, add other raw materials other than B and Ce, and stir thoroughly using mechanical stirring.

[0018] Step 3: After holding the aluminum melt obtained in Step 2 at a constant temperature for 30 minutes, add Al-3B master alloy and stir thoroughly using mechanical stirring. After holding at a constant temperature for 1 to 2 hours, degas and remove slag.

[0019] Step 4: The aluminum melt obtained in Step 3 is heated to 760-780℃, then Al-10Ce master alloy is added and stirred thoroughly by mechanical stirring. After holding at this temperature for 20-40 minutes, the crystal temperature reaches 730-750℃. Then, an inert gas refining agent is used for degassing, followed by slag removal.

[0020] Step 5: Cool the alloy melt obtained in Step 4 to 710-740℃ and hold it for 30 minutes. Then use a casting machine and an extrusion press to prepare aluminum alloy round rods.

[0021] Step 6: Use a drawing machine to draw the aluminum alloy round rod into aluminum alloy wire, and then anneal it at 200-450℃ for 1-20 hours to obtain 8030 aluminum alloy wire.

[0022] The purity and compositional uniformity of the aluminum alloy melt are crucial for ensuring the strength, conductivity, and elongation of the conductor. Therefore, to improve the compositional uniformity of the aluminum alloy melt, mechanical stirring is used three times during the smelting process (steps two, three, and four) for thorough stirring. To obtain a high-purity aluminum alloy melt and promote the sedimentation of impurity elements during smelting, this invention selects a resistance melting furnace or a gas-fired melting furnace, and allows the alloy melt to stand for at least 30 minutes before casting.

[0023] In steps three and four, to reduce burn-off, a layer of covering agent is evenly sprinkled on the aluminum ingot and the molten aluminum after slag removal.

[0024] Optionally, the refining agent mainly contains hexachloroethane, and the covering agent mainly contains sodium chloride and potassium chloride. One function is to promote the flotation of hydrogen and inclusions, and the other is to reduce oxidation and hydrogen entering the melt.

[0025] Step three is to achieve the best melt purification effect of element B. When the aluminum melt temperature is 730-760℃, Al-3B master alloy is added, and after thorough stirring, it is kept at the temperature for 1-2 hours.

[0026] To achieve the best treatment effect of rare earth Ce element, step four involves adding Al-10Ce master alloy when the aluminum melt temperature is 760-780℃, stirring thoroughly, and then holding at that temperature for 20-40 minutes.

[0027] In existing technologies, 8030 aluminum alloy wire is a new type of lightweight alloy with Fe and Cu as the main alloying elements, possessing good electrical conductivity and mechanical properties. 8030 aluminum alloy wire has an electrical conductivity ≥61% IACS, a tensile strength of 103-152 MPa, an elongation ≥10%, creep resistance similar to copper, nearly 300% higher than pure aluminum, and good corrosion resistance.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] (1) The present invention optimizes the composition of 8030 aluminum alloy, especially the content of Fe and Cu elements, which synergistically improves electrical conductivity and tensile strength.

[0030] (2) This invention optimizes the boronizing process of 8030 aluminum alloy, particularly optimizing the boronizing temperature and the amount of boron added. While purifying impurity elements such as Ti, V, Cr, and Mn in the melt, it avoids the retention of boron as an impurity element in the melt (e.g., ...). Figure 1 (as shown), thereby improving the conductivity of the alloy.

[0031] (3) This invention optimizes the melt treatment process of rare earth Ce in 8030 aluminum alloy, particularly optimizing the addition temperature and amount of Ce. By adding Al-10Ce master alloy at an aluminum melt temperature of 760–780°C, and holding the mixture at this temperature for 20–40 minutes after thorough stirring, the treatment effect of rare earth on the iron-containing phase is improved, limiting its full growth during solidification and preventing the diffusion of Fe elements into the matrix during solidification (e.g., Figure 2 As shown in the figure, this improves strength while ensuring conductivity.

[0032] (4) This invention achieves a synergistic increase in conductivity, tensile strength and elongation of 8030 aluminum alloy through multi-scale control of alloy composition, boronizing process and rare earth addition process. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Figure 1 The image shows the elemental distribution of the second phase of 8030 aluminum alloy after boronizing treatment at 500 nm. The first row from left to right is: BF, Fe, Cu, B; the second row from left to right is: Mn, Ti, V, Cr.

[0035] Figure 2 The elemental distribution of the second phase of 8030 aluminum alloy at 10 μm is shown in the diagram. From left to right, the elements are: BSE, Fe, and Ce. Detailed Implementation

[0036] The present invention is described in detail below through examples, but the present invention is not limited to these embodiments. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the equipment and materials used are all commercially available.

[0037] Example 1

[0038] An 8030 aluminum alloy wire has the following element mass percentages: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0039] The specific manufacturing process of this 8030 aluminum alloy conductor is as follows:

[0040] Step 1: Prepare the corresponding raw materials according to the mass percentage of the above alloying elements, specifically: aluminum ingots, pure copper, pure zinc, pure magnesium, covering agent and refining agent;

[0041] Step 2: Put industrial pure aluminum into the aluminum melting furnace and sprinkle a covering agent. After melting, heat it to 730-760℃, add pure Cu, Zn and Mg ingots using a pressure hood, and then use mechanical stirring to stir it thoroughly.

[0042] Step 3: After the aluminum melt obtained in Step 2 is held at 740±5℃ for 30 minutes, it is degassed using inert gas and refining agent, and then slag is removed.

[0043] Step 4: After cooling the alloy melt obtained in Step 3 to 720±5℃, keep it at that temperature for 30 minutes, and then use a casting machine and an extrusion press to prepare an aluminum alloy round rod with a diameter of 9.5mm.

[0044] Step 5: Using a drawing machine, the aluminum alloy round rod is drawn into an aluminum alloy wire with a diameter of 3mm through 8 drawing passes, and then annealed at 350±5℃ for 4 hours to obtain 8030 aluminum alloy wire.

[0045] Example 2

[0046] The difference from the preparation process in Example 1 is that a boronizing treatment was added during the smelting process. The mass percentages of each element are: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, B 0.01%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0047] The specific manufacturing process of this 8030 aluminum alloy conductor is as follows:

[0048] Step 1: Prepare the corresponding raw materials according to the mass percentage of the above alloying elements, specifically: aluminum ingots, pure copper, pure zinc, pure magnesium, covering agent and refining agent;

[0049] Step 2: Put industrial pure aluminum into the aluminum melting furnace and sprinkle a covering agent. After melting, heat it to 730-760℃, add pure Cu, Zn and Mg ingots using a pressure hood, and then use mechanical stirring to stir it thoroughly.

[0050] Step 3: After the aluminum melt obtained in Step 2 is kept at 750±5℃ for 30 minutes, Al-3B master alloy is added and stirred thoroughly by mechanical stirring. The mixture is kept at 750±5℃ for 1.5 hours, and then cooled to 740±5℃. Inert gas and refining agent are used for degassing and slag removal.

[0051] Step 4: After cooling the alloy melt obtained in Step 3 to 720±5℃, keep it at that temperature for 30 minutes, and then use a casting machine and an extrusion press to prepare an aluminum alloy round rod with a diameter of 9.5mm.

[0052] Step 5: Using a drawing machine, the aluminum alloy round rod is drawn into an aluminum alloy wire with a diameter of 3mm through 8 drawing passes, and then annealed at 350±5℃ for 4 hours to obtain 8030 aluminum alloy wire.

[0053] Example 3

[0054] The difference from the preparation process in Example 1 is that rare earth Ce modification was performed during the smelting process. The mass percentage of each element is as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Ce 0.2%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0055] The specific manufacturing process of this 8030 aluminum alloy conductor is as follows:

[0056] Step 1: Prepare the corresponding raw materials according to the mass percentage of the above alloying elements, specifically: aluminum ingots, pure copper, pure zinc, pure magnesium, covering agent and refining agent;

[0057] Step 2: Put industrial pure aluminum into the aluminum melting furnace and sprinkle a covering agent. After melting, heat it to 730-760℃, add pure Cu, Zn and Mg ingots using a pressure hood, and then use mechanical stirring to stir it thoroughly.

[0058] Step 3: After heating the aluminum melt obtained in Step 2 to 780℃, add Al-10Ce master alloy and stir thoroughly using mechanical stirring. After holding at 780±5℃ for 30 minutes, lower the temperature of the alloy melt to 740±5℃, and then use inert gas and refining agent to degas and remove slag.

[0059] Step 4: After cooling the alloy melt obtained in Step 3 to 720±5℃, keep it at that temperature for 30 minutes, and then use a casting machine and an extrusion press to prepare an aluminum alloy round rod with a diameter of 9.5mm.

[0060] Step 5: Using a drawing machine, the aluminum alloy round rod is drawn into an aluminum alloy wire with a diameter of 3mm through 8 drawing passes, and then annealed at 350℃ for 4 hours to obtain 8030 aluminum alloy wire.

[0061] Example 4

[0062] The difference between this preparation process and that of Example 1 is that both boronizing and rare earth Ce modification were performed during the smelting process. The mass percentages of each element are as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, B 0.01%, Ce 0.2%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0063] The specific manufacturing process of this 8030 aluminum alloy conductor is as follows:

[0064] Step 1: Prepare the corresponding raw materials according to the mass percentage of the above alloying elements, specifically: aluminum ingots, pure copper, pure zinc, pure magnesium, covering agent and refining agent;

[0065] Step 2: Put industrial pure aluminum into the aluminum melting furnace and sprinkle a covering agent. After melting, heat it to 730-760℃, add pure Cu, Zn and Mg ingots using a pressure hood, and then use mechanical stirring to stir it thoroughly.

[0066] Step 3: After the aluminum melt obtained in Step 2 is kept at 750±5℃ for 30 minutes, Al-3B master alloy is added and stirred thoroughly by mechanical stirring. The mixture is kept at 750±5℃ for 1.5 hours, and then cooled to 740±5℃. Inert gas and refining agent are used for degassing and slag removal.

[0067] Step 4: After heating the aluminum melt obtained in Step 3 to 780℃, add Al-10Ce master alloy and stir thoroughly using mechanical stirring. After holding at 780±5℃ for 30 minutes, lower the temperature of the alloy melt to 740±5℃, and then use inert gas and refining agent to degas and remove slag.

[0068] Step 5: After cooling the alloy melt obtained in Step 4 to 720±5℃, keep it at that temperature for 30 minutes, and then use a casting machine and an extrusion press to prepare an aluminum alloy round rod with a diameter of 9.5mm.

[0069] Step 6: Using a drawing machine, the aluminum alloy round rod is drawn into an aluminum alloy wire with a diameter of 3mm through 8 drawing passes, and then annealed at 350℃ for 4 hours to obtain 8030 aluminum alloy wire.

[0070] Comparative Example 1

[0071] The preparation process of Comparative Example 1 is the same as that of Example 1, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 1 is as follows: Fe 0.7%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0072] Comparative Example 2

[0073] The preparation process of Comparative Example 2 is the same as that of Example 1, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 2 is as follows: Fe 0.5%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0074] Comparative Example 3

[0075] The preparation process of Comparative Example 3 is the same as that of Example 1, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 3 is as follows: Fe 0.4%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0076] Comparative Example 4

[0077] The preparation process of Comparative Example 4 is the same as that of Example 1, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 4 is as follows: Fe 0.6%, Cu 0.15%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0078] Comparative Example 5:

[0079] The preparation process of Comparative Example 5 is the same as that of Example 1, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 5 is as follows: Fe 0.6%, Cu 0.25%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0080] Comparative Example 6

[0081] The preparation process of Comparative Example 6 is the same as that of Example 1, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 6 is as follows: Fe 0.6%, Cu 0.3%, Zn 0.02%, Mg 0.003%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0082] Comparative Example 7

[0083] The preparation process of Comparative Example 7 is the same as that of Example 2, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 7 is as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, B 0.005%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0084] Comparative Example 8

[0085] The preparation process of Comparative Example 8 is the same as that of Example 2, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 8 is as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, B 0.04%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0086] Comparative Example 9

[0087] The preparation process of Comparative Example 9 is the same as that of Example 2, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 9 is as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, B 0.08%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0088] Comparative Example 10

[0089] The preparation process of Comparative Example 10 is the same as that of Example 2, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 10 is as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, B 0.12%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0090] Comparative Example 11

[0091] The mass percentages of each element in Comparative Example 11 are the same as those in Example 2, the difference being the boronizing temperature. In Comparative Example 11, the Al-3B master alloy was added at a temperature of 730±5℃.

[0092] Comparative Example 12

[0093] The mass percentages of each element in Comparative Example 12 are the same as those in Example 2, the difference being the boronizing temperature. In Comparative Example 12, the Al-3B master alloy was added at a temperature of 740±5℃.

[0094] Comparative Example 13

[0095] The mass percentages of each element in Comparative Example 13 are the same as those in Example 2, the difference being the boronizing temperature. In Comparative Example 13, the Al-3B master alloy was added at a temperature of 760±5℃.

[0096] Comparative Example 14

[0097] The preparation process of Comparative Example 14 is the same as that of Example 3, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 14 is: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Ce 0.1%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0098] Comparative Example 15

[0099] The preparation process of Comparative Example 15 is the same as that of Example 3, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 15 is as follows: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Ce 0.3%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0100] Comparative Example 16

[0101] The preparation process of Comparative Example 16 is the same as that of Example 3, except that the mass percentage of each element is different. The mass percentage of each element in Comparative Example 16 is: Fe 0.6%, Cu 0.2%, Zn 0.02%, Mg 0.003%, Ce 0.4%, Si 0.05%, Mn 0.001%, Ti 0.002%, Cr 0.001%, V 0.002%, with the balance being aluminum.

[0102] Comparative Example 17

[0103] The mass percentages of each element in Comparative Example 17 are the same as those in Example 3, the difference being the modification temperature of rare earth Ce. In Comparative Example 17, the addition temperature of the Al-10Ce master alloy is 760±5℃.

[0104] Comparative Example 18

[0105] The mass percentages of each element in Comparative Example 18 and Example 3 are the same, except that the modification temperature of rare earth Ce is different. The addition temperature of Al-10Ce master alloy in Comparative Example 18 is 800±5℃.

[0106] The 8030 aluminum alloy wires in the above cases were subjected to room temperature tensile and conductivity tests, and the test results are shown in Table 1. Examples 1 and Comparative Examples 1-6 show that appropriate Fe and Cu content helps improve the tensile strength and conductivity of the 8030 aluminum alloy wires. Examples 2 and Comparative Examples 7-13 show that the boronizing temperature and the amount of boron added are key to purifying the melt and improving conductivity. Examples 3 and Comparative Examples 14-18 show that appropriate Ce element addition and addition temperature can effectively improve the elongation and conductivity of the wires. Examples 1-4 show that a suitable boronizing process and rare earth Ce element addition process can synergistically improve the tensile strength, elongation, and conductivity of the 8030 aluminum alloy wires.

[0107] Table 1. Tensile strength, elongation, and conductivity of 8030 aluminum alloy wires in the examples and comparative examples.

[0108]

[0109]

[0110] Although the present invention has been described in detail above with general descriptions and specific examples, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. An 8030 aluminum alloy conductor, characterized in that, The composition and mass percentage of 8030 aluminum alloy are as follows: Fe 0.6~0.75%, Cu 0.2~0.25%, Ce 0.05~0.3%, B 0.001~0.04%, Zn 0.01~0.05%, Mg 0.003~0.005%, Si≤0.1%, impurity element content≤0.05%, and the balance is aluminum.

2. The 8030 aluminum alloy conductor according to claim 1, characterized in that, Fe is added in the form of Al-10Fe master alloy; Cu is added in the form of pure Cu; B is added in the form of Al-3B master alloy; Ce is added in the form of Al-10Ce master alloy.

3. A manufacturing process for 8030 aluminum alloy wire, characterized in that, Includes the following steps: Step 1: Analyze the composition of aluminum ingots and prepare raw materials according to the mass percentage of alloy components; Step 2: Put industrial pure aluminum into the aluminum melting furnace and sprinkle a covering agent. After melting, raise the temperature to 730-760℃, add other raw materials other than B and Ce, and stir thoroughly. Step 3: After the aluminum melt obtained in Step 2 is kept at a certain temperature, Al-3B master alloy is added, and the mixture is stirred thoroughly. After being kept at a certain temperature again, the mixture is degassed and slag is removed. Step 4: The aluminum melt obtained in Step 3 is heated to 760-780℃, then Al-10Ce master alloy is added and stirred thoroughly. After holding at this temperature, the crystallization temperature is raised to 730-750℃. Inert gas refining agent is used for degassing, and then slag is removed. Step 5: Cool the alloy melt obtained in Step 4 to 710-740℃ and hold it at that temperature, then prepare it into an aluminum alloy round rod; Step 6: Draw the aluminum alloy round rod into aluminum alloy wire, and anneal it at 200-450℃ for 1-20 hours to obtain 8030 aluminum alloy wire.

4. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, During the smelting process, mechanical stirring is used three times in total, in steps two, three, and four, to ensure thorough stirring.

5. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, The aluminum melting furnace is either a resistance melting furnace or a gas melting furnace, and the alloy melt is allowed to stand for at least 30 minutes before being poured.

6. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, In steps three and four, a layer of covering agent is evenly sprinkled on the aluminum ingots and the molten aluminum after slag removal.

7. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, The covering agent contains sodium chloride and potassium chloride.

8. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, The refining agent contains hexachloroethane.

9. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, Step 3: Add Al-3B master alloy when the temperature of the aluminum melt is 730-760℃, stir thoroughly, and keep warm for 1-2 hours.

10. The manufacturing process of the 8030 aluminum alloy conductor according to claim 3, characterized in that, In step four, Al-10Ce master alloy is added when the temperature of the aluminum melt is 760-780℃, and after thorough stirring, the mixture is kept at this temperature for 20-40 minutes.

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