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Preparation method of high-strength high-conductivity aluminum alloy wires

An aluminum alloy wire and high-conductivity technology, which is applied in the field of aluminum alloy preparation, can solve the problems of limiting the use of alloy wires, decreased conductivity, and large performance differences, and achieves comprehensive mechanical properties, electrical conductivity, and uniformity of wire performance. , Provide dynamic nucleation and spheroidization elongation, and promote the effect of rapid precipitation or complete precipitation

Active Publication Date: 2019-02-01
重庆南涪铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloy is an aging heat treatment strengthened alloy. After solid solution treatment, it will produce a parking effect if it is parked at room temperature for more than 4 hours, which will reduce the strength of the finished alloy wire after the final heat treatment of the alloy and affect the uniformity of the performance of the finished wire.
The performance of products varies greatly at different times, resulting in the situation that the aluminum alloy rod products of alloy rod manufacturers are self-produced and used, which greatly limits the use of alloy wires; the final artificial aging of value alloy wires has directionality in the precipitation of alloy strengthening phase elements. Acicular Mg formation with aging 2 The Si strengthening phase forms a semi-conjugated or non-conjugated relationship with the aluminum matrix, and its anti-overaging performance is poor (after reaching the peak aging time, the aging time continues to be prolonged, and the strength decreases significantly), and the alloy wire has an increase in strength and a decrease in conductivity, which is Improving the electrical conductivity of the alloy must be at the expense of the strength of the alloy, and vice versa; at present, the chemical composition within Al-0.6%Mg-0.6Si% is generally used in the world to produce wires with a conductivity of 53.5-55.0%IACS aluminum Alloy wires, even medium-strength aluminum alloy wires with Mg and Si contents not exceeding 0.35% (230MPa, 56.5%IACS)

Method used

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  • Preparation method of high-strength high-conductivity aluminum alloy wires
  • Preparation method of high-strength high-conductivity aluminum alloy wires
  • Preparation method of high-strength high-conductivity aluminum alloy wires

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The specific steps of the preparation method for preparing a high-strength and high-conductivity aluminum alloy wire are as follows:

[0027] The first step: prepare Al-0.9%Mg-0.9%Si aluminum alloy composition. Heat and melt 1885.82kg of industrial pure aluminum (Wt, Fe≤0.13%, Si≤0.08%) with a purity greater than 99.7% in a melting furnace, and add Al-20%Si to the molten pure aluminum at a temperature of 740°C Master alloy 92.46kg, Mg18.676kg. After the added alloy elements are melted, the aluminum alloy melt is stirred, and then 40.02kg of Al-3%B master alloy is added to carry out boridation treatment on the melt, and the boronization treatment time is 10min.

[0028] The second step is to purify the melt such as degassing, impurity removal, slag removal, and covering; after boriding, when the melt temperature reaches 740 ° C, nitrogen is sprayed into the aluminum alloy melt with a melt mass fraction of 1%. Refining agent refining, the refined melt is evenly covered ...

Embodiment 2

[0035] The specific steps of the preparation method for preparing a high-strength and high-conductivity aluminum alloy wire are as follows:

[0036] The first step: prepare Al-1.2%Mg-1.15%Si aluminum alloy components. Heat and melt 1820.788kg of industrial pure aluminum (Wt, Fe≤0.13%, Si≤0.08%) with a purity greater than 99.7% in a melting furnace. When the temperature is 750°C, 120.6kg of Al-20%Si master alloy and 24.36kg of Mg are added to the molten pure aluminum. After the added alloy elements are melted, the aluminum alloy melt is stirred, and then 40.2kg of Al-3%B master alloy is added to carry out boridation treatment on the melt, and the boronization treatment time is 15min.

[0037] The second step is to purify the melt such as degassing, impurity removal, slag removal, and covering; after boriding, when the melt temperature reaches 740 ° C, nitrogen is sprayed into the aluminum alloy melt with a melt mass fraction of 1%. Refining with refining agent, the refined mel...

Embodiment 3

[0044] The specific steps of the preparation method for preparing a high-strength and high-conductivity aluminum alloy wire are as follows:

[0045] The first step: prepare Al-1.5%Mg-1.4%Si aluminum alloy composition. Heat and melt 1826.11kg of industrial pure aluminum with a purity greater than 99.7% (Wt, Fe≤0.13%, Si≤0.08%) in a melting furnace, and add Al-20%Si to the molten pure aluminum at a temperature of 760°C Master alloy 140.7kg, Mg 30.45kg. After the added alloying elements were melted, the aluminum alloy melt was stirred, and then 40.02kg of Al-3%B intermediate alloy was added to carry out boridation treatment on the melt, and the boronization treatment time was 20 Min.

[0046] The second step is to purify the melt such as degassing, impurity removal, slag removal, and covering; after boriding, when the melt temperature reaches 740 ° C, nitrogen is sprayed into the aluminum alloy melt with a melt mass fraction of 1%. Refining agent refining, the refined melt is s...

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Abstract

The invention discloses a preparation method of high-strength high-conductivity aluminum alloy wires. The preparation method comprises the following step that 1, industrial pure aluminum (Wt, less than or equal 0.13% Fe, less than or equal to 0.08% Si) with purity larger than 99.7% is heated and molten in a smelting furnace, and molten aluminum flows into a heat preservation furnace through a flowgroove connected with the heat preservation furnace; then an intermediate alloy Al-Si and Mg is added into the molten aluminum of the heat preservation furnace, and the alloy comprises the followingcomponents of, by mass, 0.9%-1.4% of Si, 0.9%-1.5% of Mg, 0.06% of B and the balance Al, the impurity content is lower than 0.02%, and then boron treatment is conducted; 2, purification treatment is conducted; 3, melt is discharged from the heat preservation furnace and then flows through the flow groove to be poured into a continuous casting machine connected at the rear in an on-line mode; 4, aluminum alloy wire rods are formed through continuous ECAE with continuous cast formed aluminum alloy wire ingots on an ECAE forming machine; 5, the aluminum alloy wire rods are formed through ECAE offour to seven passes; and 6, artificial aging is conducted.

Description

technical field [0001] The invention relates to the field of aluminum alloy preparation, in particular to a method for preparing a high-strength and high-conductivity aluminum alloy wire. Background technique [0002] With the continuous development of my country's economy, the demand for electricity in various industries is increasing year by year. Due to the gap between my country's resources and development, developed industries are mainly distributed in coastal and eastern regions, while power resources are mainly distributed in western regions. The demand for electric power is increasing, so overhead transmission wires, as the carrier of electric energy, play an important role in the entire electric power transmission route of "power transmission from west to east and mutual supply between north and south". High-performance aluminum alloy wire is an urgently needed power transmission material in the power industry. Al-Mg-Si aluminum alloy wire has the advantages of light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22C1/06C22F1/05C22F1/043C22F1/047
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 周天国彭程
Owner 重庆南涪铝业有限公司