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Non-aging type high-strength and high-conductivity aluminum alloy overhead conductor and preparation method thereof

An overhead wire and high conductivity technology, which is applied in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of high product price, long aging process time, and small reduction, and achieve excellent electrical conductivity and mechanical properties. Improve the use value and adjust the effect of process parameters

Active Publication Date: 2021-03-19
FAR EAST CABLE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used aluminum alloy wires in China are mainly aging-strengthened Al-Mg-Si aluminum alloys, which have excellent performance, but due to the long aging process and high product prices, the application range of wires is limited. Research on aging medium-strength aluminum alloys, and achieved corresponding results
However, these research results or the process is complicated, and they are not really non-aging. For example, the alloy rods of continuous casting and rolling need to be heat treated, which is equivalent to changing from aging wires to aging rods, or the raw materials are special, the price is high, and the batch The cost cannot be reduced or the reduction is very small in the process of mass production, and the conditions for mass production are not yet available.

Method used

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  • Non-aging type high-strength and high-conductivity aluminum alloy overhead conductor and preparation method thereof
  • Non-aging type high-strength and high-conductivity aluminum alloy overhead conductor and preparation method thereof

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preparation example Construction

[0021] The non-aging high-strength and high-conductivity aluminum alloy overhead wire and its preparation method in this embodiment include the following steps:

[0022] Step 1: Configure aluminum liquid: melt the aluminum ingot, perform boronization treatment, analyze the composition, add AlFe20 alloy ingot and AlCu50 alloy ingot for microalloying treatment according to the analysis data, and let it stand;

[0023] Step 2: Flow the melt obtained in Step 1 into the launder, add grain refiner online and stir evenly;

[0024] Step 3: continuous casting and rolling to obtain aluminum alloy rods;

[0025] Step 4: drawing the aluminum alloy rod obtained by continuous casting and rolling into an aluminum alloy single wire of φ2.50-4.75 mm;

[0026] Step 5: Concentrically stranding multiple aluminum alloy single wires prepared in Step 4 directly through a stranding machine to obtain finished aluminum alloy wires.

[0027] In the first step, the mass percentages of the aluminum allo...

example 1

[0035] According to mass percentage, Fe: 0.74%; Cu: 0.21%; Si: 0.04%; Ti+V+Mn+Cr: 0.014%. Boriding, refining for 30 minutes, standing still for 30 minutes after slag removal, component analysis; alloy melting, alloy melting temperature 770 ° C;

[0036] After standing still, the aluminum melt flows into the launder for grain refinement treatment and degassing and impurity removal outside the furnace. Al-Ti-C grain refiner is added at a speed of 45mm / min, and the hydrogen content w(H): 0.17mL / 100g;

[0037] Aluminum alloy rods were prepared by continuous casting and rolling. The casting temperature was 700-710°C, and the rolling temperature was 440-460°C. The tensile strength of the aluminum alloy rods was 142MPa, the elongation was 16.5%, the electrical conductivity was 59.7%, and the resistivity was 0.02886Ω. mm 2 / m.

[0038] A sliding aluminum alloy wire drawing machine is used to draw φ3.75mm aluminum wire at a drawing speed of 13m / min, and one rod pulls two coils of w...

example 2

[0041] According to mass percentage, Fe: 0.67%; Cu: 0.25%; Si: 0.04%; Ti+V+Mn+Cr: 0.012%. Boriding, refining for 30 minutes, standing still for 38 minutes after slag removal; alloy melting, alloy melting temperature 770 ° C;

[0042] After standing still, the aluminum melt flows into the launder for grain refinement treatment and degassing and impurity removal outside the furnace. Al-Ti-C grain refiner is added at a speed of 40mm / min, and the hydrogen content w(H): 0.15mL / 100g;

[0043] Aluminum alloy rods were prepared by continuous casting and rolling. The casting temperature was 700-710°C, and the rolling temperature was 460-470°C. The tensile strength of the aluminum alloy rods was 138MPa, the elongation was 16%, the electrical conductivity was 59.7%, and the resistivity was 0.02890Ω. mm 2 / m;

[0044] A φ3.75mm aluminum wire was drawn by a sliding aluminum alloy wire drawing machine at a drawing speed of 15m / min.

[0045] Use a frame-type twisting machine to twist th...

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Abstract

The invention discloses a non-aging type high-intensity high-conductivity aluminum alloy overhead conductor and a preparation method thereof. The method comprises the following steps of 1, preparing molten aluminum: melting an aluminum ingot; performing boronizing treatment; analyzing ingredients; adding AlFe20 alloy ingots and AlCu50 alloy ingots for micro alloying treatment according to analysisdata; performing still standing; flowing melt obtained in the step 1 into a flowing groove; adding grain particle fining agents on line; performing uniform stirring; performing continuous casting andcontinuous milling to obtain an aluminum alloy rod; pulling an aluminum alloy rod obtained through the continuous casting and continuous milling to obtain an aluminum alloy single wire with the diameter phi being 2.50 to 4.75 mm; directly performing concentric stranding on a plurality of aluminum alloy single wires prepared in the fourth step to obtain a finished product of the aluminum alloy conductor. The prepared overhead conductor has the advantages that the mechanical property and the conduction performance are excellent; the process is simple and convenient; the energy consumption is low; the cost advantages are obvious; the conductor is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the wire and cable manufacturing industry in the field of electric power transmission, and in particular relates to a non-time-sensitive high-strength and high-conductivity aluminum alloy overhead wire and a preparation method thereof. Background technique [0002] At present, the wires used in my country's overhead transmission lines are basically still traditional steel-cored aluminum stranded wires. Due to the basic performance of its products, the transmission capacity of the line is limited to a certain extent, and the line loss is also relatively large. Moreover, the operation level of my country's power grid is not high at present, and the construction time of domestic old lines is long (more than 30 years). The power transmission network system has gradually been unable to meet the needs of economic and social development. With the rapid development of the economy, power supply has become a constraint A key factor of eco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/00B21C37/04H01B13/00
CPCB21C37/04C22C1/026C22C1/03C22C1/06C22C21/00H01B13/00
Inventor 张志力张瑜刘长江夏霏霏戴雪瑾
Owner FAR EAST CABLE