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Heat-resistant aluminum alloy conductor with high strength and high conductivity and preparation method thereof

A technology of aluminum alloy wires and aluminum alloy rods, which is used in cable/conductor manufacturing, electrical components, circuits, etc. problems, to achieve the effect of enhancing strength and heat resistance, low line loss energy consumption, and improving tensile strength and heat resistance

Active Publication Date: 2012-10-31
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this invention technology is: the price of adding element Sc is too expensive, it is difficult to carry out large-scale application in industry
"The disadvantage of this invention is that the addition of boron alloy reacts with the zirconium in the aluminum alloy wire, which not only fails to achieve the desired effect of grain refinement, but also reduces the heat resistance of the alloy.
[0005] At present, under the condition of maintaining high strength and heat resistance in domestic aluminum conductors, it is generally impossible to increase the conductivity to above 61% IACS

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The wire is composed of the following elements by weight percentage: 0.15% zirconium Zr, 0.03% lanthanum La, 0.03% cerium Ce, 0.30% yttrium Y, 0.05-0.20% iron Fe, 0.01-0.10% silicon Si, The content of other impurity elements is ≤0.10%, and the rest is aluminum. Iron and silicon do not need to be specially added during the preparation process, but exist in aluminum originally, and the other embodiments are the same.

[0027] Select Al99.7% industrial pure aluminum and place it in a smelting furnace to melt it into molten aluminum, raise the temperature of the molten aluminum to 720~730°C, according to the formula zirconium Zr0.15%, lanthanum La0.03%, cerium Ce0.03%, yttrium Y0 .30% of the intermediate alloy was weighed and put into molten aluminum; after the intermediate alloy was melted, a degasser was added to degas, and a graphite rod was used to stir slowly and fully; degas and slag were obtained to obtain aluminum alloy liquid, and the aluminum alloy was allowed to ...

Embodiment 2

[0029]The wire is composed of the following elements by weight: 0.18% Zr, 0.03% lanthanum La, 0.03% cerium Ce, 0.25% yttrium Y, 0.05-0.20% iron Fe, 0.01-0.10% silicon Si, and others The content of impurity elements is ≤0.10%, and the rest is aluminum.

[0030] Select Al99.7% industrial pure aluminum and put it in a smelting furnace to melt into molten aluminum, heat up the molten aluminum to 720~730°C, according to the formula zirconium Zr0.18%, lanthanum La0.03%, cerium Ce0.03%, yttrium Y0 .25% respectively weigh the master alloy and put it into molten aluminum; other implementation conditions are the same as in Example 1. After testing, its strength is 173MPa, electrical conductivity is 61.8%, and the strength residual rate after short-term heating at 280°C for 1 hour is 95.2%.

Embodiment 3

[0032] The wire is composed of the following elements by weight percentage: Zr0.18%, zirconium Zr0.60%, lanthanum La0.30%, cerium Ce0.30%, yttrium Y0.01%, iron Fe 0.05~0.20%, silicon Si 0.01~0.10%, the content of other impurity elements is ≤0.10%, and the rest is aluminum.

[0033] Select Al99.7% industrial pure aluminum and place it in a smelting furnace to melt it into molten aluminum, raise the temperature of the molten aluminum to 720~730°C, according to the formula zirconium Zr0.60%, lanthanum La0.30%, cerium Ce0.30%, yttrium Y0 .01% respectively weigh the master alloy and put it into the aluminum melt; after the master alloy is melted, add a degasser to degas, and use a graphite rod to stir slowly and fully; degas and remove slag to obtain an aluminum alloy liquid, let it The aluminum alloy liquid enters the aluminum rod continuous casting and rolling mechanism to cast the slab. The temperature of the casting slab is 510~530°C, and the aluminum rod of Φ10mm is obtained; ...

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Abstract

The invention discloses a heat-resistant aluminum alloy conductor with high strength and high conductivity and a preparation method thereof. The conductor comprises the following elements in percentage by weight: 0.15-0.60% of zirconium (Zr), 0.03-0.30% of lanthanum (La), 0.03-0.30% of cerium (Ce), 0.01-0.30% of yttrium (Y), 0.05-0.20% of ferrum (Fe), 0.01-0.10% of silicon (Si), not more than 0.10% of other impurity elements and the balance of aluminum. The method comprises the following steps of: preparing raw materials; putting the raw materials into a smelting furnace; heating, degassing and smelting the raw materials; making slag; removing the slag; continuously casting and rolling the raw materials to obtain a heat-resistant aluminum alloy rod; carrying out heat treatment on the heat-resistant aluminum alloy rod; and drawing the heat-resistant aluminum alloy rod by using a wire drawing machine so as to obtain a single heat-resistant aluminum alloy wire. The heat-resistant aluminum alloy conductor disclosed by the invention has the characteristics as follows: the tensile strength reaches 160 MPa, the electric conductivity can reach more than 61% IACS (International Annealed Copper Standard), the long-term operation temperature can reach 180 DEG C, the conductor stands up to examining operation while being heated for one hour at 280 DEG C, and strength survival rate is more than 90%.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy wire manufacturing, in particular to a high-strength, high-conductivity and heat-resistant aluminum alloy wire used in overhead power transmission and transformation lines and a manufacturing method thereof. Background technique [0002] With the rapid development of my country's national economy, transmission lines are developing in the direction of high voltage, long distance and large capacity. At present, the heat-resistant wires used in my country's urban and rural power transmission and transformation lines are generally twisted from ordinary heat-resistant aluminum alloy single wires and ordinary galvanized steel wires. This kind of ordinary heat-resistant wire generally has a long-term operating temperature of no more than 150°C. Compared with ordinary wires, it can only increase the current carrying capacity by 1.6 times, and the capacity is not greatly improved, and the conductivi...

Claims

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Application Information

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IPC IPC(8): C22C21/00H01B13/00
Inventor 高海燕张永志尤伟任缪小林顾孙望王俊孙宝德蒯渊
Owner SHANGHAI JIAO TONG UNIV
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