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Manufacturing method of high-conductivity high-strength aluminum alloy wire for smart power grid

An aluminum alloy wire, smart grid technology, used in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of difficult to meet the conditions of industrial production, difficult to improve the cost performance, etc., to improve the use value, electrical conductivity and mechanical properties. Excellent, application-promoting effect

Active Publication Date: 2017-05-10
FAR EAST CABLE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are current studies to improve the performance of aluminum alloy wires, it is difficult to improve the cost performance by using aluminum ingots with high purity (99.8% and above); or it is difficult to meet the conditions of industrial production by using special technological means.

Method used

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Examples

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Comparison scheme
Effect test

specific example 1

[0020] (1) According to the mass percentage, Mg: 0.68%; Si: 0.65%; Fe: 0.28%; Y: 0.0008%; Ti+V+Mn+Cr: 0.015% alloy melting, alloy melting temperature 760 ° C; rare earth optimization, Boronizing for 30 minutes, refining for 30 minutes, and standing for 40 minutes after removing slag;

[0021] (2) Continuous casting and rolling aluminum alloy rods after standing still, the casting temperature is 700°C, and the rolling temperature is 515°C;

[0022] (3) The aluminum alloy rods obtained by continuous casting and rolling are naturally aged for 84 hours at room temperature; the rolling stress of the aluminum alloy rods is released to a certain extent through natural aging, and a GP zone where a small amount of strengthening phase precipitates is formed.

[0023] (4) Draw a φ3.50mm aluminum alloy round wire with the aluminum alloy rod after natural aging, and the drawing speed is 15m / s;

[0024] (5) The aluminum alloy round wire is artificially aged at 155° C. for 6.5 hours.

[00...

specific example 2

[0027] (1) According to the mass percentage, Mg: 0.72%; Si: 0.69%; Fe: 0.25%; Y: 0.001%; ​​Ti+V+Mn+Cr: 0.018% alloy melting, alloy melting temperature 780 ° C; rare earth optimization, Boronizing for 35 minutes, refining for 30 minutes, and standing for 50 minutes after removing slag;

[0028] (2) Continuous casting and rolling aluminum alloy rods after standing still, the casting temperature is 710°C, and the rolling temperature is 525°C;

[0029] (3) The aluminum alloy rod obtained by continuous casting and rolling is naturally aged for 96 hours at room temperature;

[0030] (4) Draw φ3.07mm aluminum alloy round wire and φ4.43mm aluminum alloy “Z” type wire with equivalent diameter φ4.43mm aluminum alloy rod after natural aging, drawing speed is 10m / s;

[0031] (5) Artificially aging the aluminum alloy round wire at a temperature of 158° C. for 8 hours.

[0032] (6) Artificial aging aluminum alloy wire The round wire is twisted according to 1+6, and the outer layer is conc...

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Abstract

The invention discloses a manufacturing method of a high-conductivity high-strength aluminum alloy wire for a smart power grid. The method includes the steps that firstly, an aluminum alloy continuous casting and continuous rolling unit with an on-line purification system is used for conducting machining to obtain a supersaturated aluminum alloy rod; secondly, natural aging is conducted on the supersaturated aluminum alloy rod; thirdly, cold drawing is conducted on the aluminum alloy rod obtained in the second step to form an aluminum alloy wire; fourthly, the aluminum alloy wire is placed into a continuous aging oven for manual aging strengthening treatment; and fifthly, multiple wires obtained through the fourth step are concentrically twisted, and the performance of the twisted high-strength aluminum alloy wire meets the conditions that the tensile strength is not smaller than 340 MPa, the elongation is not smaller than 5.0%, the 20 DEG C direct current resistant rate is not higher than 0.031927 ohm.mm2 / m, and the electric conductivity is not smaller than 54.0%IACS. The wire obtained through the manufacturing method has the characteristics of being high in tension-weight ratio, good in electric conductivity and high in overload resistance; the process is simple; and the method is suitable for industrial production, can greatly save line construction cost and operation cost when applied to the smart power grid field, and has excellent economic benefits.

Description

technical field [0001] The invention relates to a method for manufacturing a high-conductivity and high-strength aluminum alloy wire for a smart grid, belonging to the field of power transmission. Background technique [0002] With the rapid development of the world economy, power supply has become a key factor restricting economic development in many countries and regions, and the demand for new and reconstructed lines is very strong. Especially in developing countries, such as Africa, Latin America, Southeast Asia and other regions, the construction of transmission lines is seriously insufficient or backward, and the problem of electricity consumption is relatively serious. For example, only about 24% of the population in Africa uses electricity. The construction of overhead transmission lines will be very important in the future. For large-scale projects, the demand for overhead conductors will also continue to grow. [0003] High-strength aluminum alloy stranded wire ha...

Claims

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Application Information

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IPC IPC(8): B21C37/04C22C1/03C22F1/05H01B13/02
CPCB21C37/04C22C1/026C22C1/03C22F1/05H01B13/02
Inventor 张志力徐静夏霏霏孔涛周飞
Owner FAR EAST CABLE
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