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Aluminum alloy conductor for extra-high voltage

An aluminum alloy wire, UHV technology, applied in the direction of metal/alloy conductors, conductors, conductive materials, etc., can solve the problems of low tensile strength, reduce heat resistance of alloys, etc., achieve low line loss energy consumption, reduce line loss The effect of energy consumption, high conductivity

Active Publication Date: 2016-03-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention strictly controls the impurity content of the aluminum ingot and the content of alloying additive elements, and the prepared aluminum alloy wire has high conductivity and heat resistance, which meets the performance requirements of the industry for the aluminum alloy wire. The disadvantages of the invention technology are: The addition of boron alloy reacts with the zirconium in the aluminum alloy wire, reducing the heat resistance of the alloy
Compared with the existing heat-resistant aluminum alloy wire, the performance of the aluminum alloy wire provided by the invention has been improved to a certain extent, but its tensile strength is still relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The wire is composed of the following elements by weight: 0.4% of Mg, 0.35% of Si, 0.2% of Cu, 0.1% of Fe, 0.07% of Zn, 0.4% of B, 0.02% of Zr, and 0.10% of Y, Ce is 0.06%, the content of other impurity elements is ≤0.1%, and the rest is Al.

[0049] The preparation method of the wire comprises the following steps:

[0050] (1) Raw material treatment: weigh all the raw materials according to the above ratio, and place them in a constant temperature drying oven at 150°C for 25 minutes to dehumidify, wherein the purity of the aluminum ingot is >99.5%;

[0051] (2) Melting: Put aluminum ingots in a melting furnace to melt into aluminum liquid, raise the temperature of the aluminum liquid to 750°C, and transfer the aluminum liquid to the holding furnace through the launder;

[0052] (3) Alloying: Add the weighed iron-aluminum alloy, zirconium-aluminum alloy, yttrium-aluminum alloy, cerium-aluminum alloy, zinc-aluminum alloy, single crystal silicon and magnesium ingot into ...

Embodiment 2

[0062] The wire is composed of the following elements by weight: 0.5% Mg, 0.45% Si, 0.25% Cu, 0.15% Fe, 0.09% Zn, 0.45% B, 0.06% Zr, 0.14% Y, Ce is 0.11%, the content of other impurity elements is ≤0.1%, and the rest is Al.

[0063] The preparation method of the wire comprises the following steps:

[0064] (1) Raw material treatment: Weigh all raw materials according to the above ratio, and place them in a constant temperature drying oven at 200°C for 30 minutes to dehumidify, wherein the purity of the aluminum ingot is >99.5%;

[0065] (2) Melting: Put the aluminum ingot in the smelting furnace to melt into molten aluminum, raise the temperature of the molten aluminum to 755°C, and transfer the molten aluminum to the holding furnace through the launder;

[0066] (3) Alloying: Add the weighed iron-aluminum alloy, zirconium-aluminum alloy, yttrium-aluminum alloy, cerium-aluminum alloy, zinc-aluminum alloy, single crystal silicon and magnesium ingot into the molten aluminum, ke...

Embodiment 3

[0076] The wire is composed of the following elements by weight: 0.6% for Mg, 0.55% for Si, 0.3% for Cu, 0.2% for Fe, 0.10% for Zn, 0.5% for B, 0.07% for Zr, 0.18% for Y, Ce is 0.15%, the content of other impurity elements is ≤0.1%, and the rest is Al.

[0077] The preparation method of the wire comprises the following steps:

[0078] (1) Raw material treatment: weigh all raw materials according to the above ratio, and place them in a constant temperature drying oven at 250°C for 35 minutes to dehumidify, wherein the purity of the aluminum ingot is >99.5%;

[0079] (2) Smelting: Put aluminum ingots in a melting furnace to melt into molten aluminum, raise the temperature of the molten aluminum to 770°C, and transfer the molten aluminum to the holding furnace through the launder;

[0080] (3) Alloying: Add the weighed iron-aluminum alloy, zirconium-aluminum alloy, yttrium-aluminum alloy, cerium-aluminum alloy, zinc-aluminum alloy, single crystal silicon and magnesium ingot into...

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Abstract

The invention provides an aluminum alloy conductor for an extra-high voltage. The aluminum alloy conductor for the extra-high voltage comprises the following components in percentage by weight: 0.4-0.7% of Mg, 0.35-0.65% of Si, 0.2-0.4% of Cu, 0.1-0.3% of Fe, 0.05-0.15% of Zn, 0.3-0.6% of B, 0.01-0.1% of Zr, 0.05-0.25% of Y, 0.04-0.2% of Ce, less than or equal to 0.1% of other impurities and elements and the balance being Al; and a preparation method of the aluminum alloy conductor for the extra-high voltage comprises the steps of raw material treatment; smelting; alloying; boronizing; refining; casting; solid solution heat treatment; rolling; drawing; and aging treatment. The aluminum alloy conductor for the extra-high voltage has the tensile strength of 269.27MPa and the electric conductivity of 63% IACS; in addition, the aluminum alloy conductor for the extra-high voltage has the strength survival rate of larger than 93% after being subjected to a test operation, namely heating at the temperature of 300 DEG C for 2 hours.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy wire manufacturing, and in particular relates to an aluminum alloy wire for extra high voltage. Background technique [0002] In recent years, under the encouragement of the rapid development of my country's national economy, the demand for electricity in various regions has continued to increase, making my country's power grid construction have an unprecedented development, and 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 lines are generally twisted from ordinary heat-resistant aluminum alloy single wires and ordinary galvanized copper wires. The long-term operating temperature of this ordinary heat-resistant wire is lower than 150°C, the conductivity is lower than 60% IACS, and the line loss is large. If you want to use it in a UHV line, you...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/08C22C21/02C22C1/03C22F1/04C22F1/043C22F1/047H01B1/02H01B5/02H01B13/00
CPCC22C1/026C22C1/03C22C21/00C22C21/02C22C21/08C22F1/04C22F1/043C22F1/047H01B1/023H01B5/02H01B13/00
Inventor 王若星罗虎丁华伟乔果
Owner STATE GRID CORP OF CHINA
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