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High-strength high-conductivity heat-resistant aluminum alloy wire and preparation method thereof

A technology of aluminum alloy and aluminum intermediate alloy, which is applied in the field of alloy wire manufacturing, can solve the problems that aluminum alloy wire cannot meet high strength, high conductivity and heat resistance at the same time, and achieve the effects of high strength, increased spacing and high conductivity

Inactive Publication Date: 2012-03-28
安徽和电普华电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing aluminum alloy wires cannot meet the requirements of high strength, high conductivity and heat resistance at the same time, the present invention provides a new formula of high strength, high conductivity and heat-resistant aluminum alloy wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Al99.80 industrial pure aluminum and customized lanthanum-aluminum (La-Al), cerium-aluminum (Ce-Al) and scandium-aluminum (Sc-Al) master alloys were selected, and the content and mass percentage of each rare earth were respectively are 19.51%, 20.01% and 20.11% (the content of lanthanum in the lanthanum-aluminum master alloy is 19.51%, the content of cerium in the cerium-aluminum master alloy is 20.01%, and the content of scandium in the scandium-aluminum master alloy is 20.11%). According to the formula of aluminum Al 99.57%, lanthanum La 0.1%, cerium Ce 0.1%, scandium Sc 0.1%, iron Fe 0.1%, respectively weigh the raw material industrial pure aluminum, the above three kinds of master alloys and iron blocks and add them to the intermediate frequency furnace , rapidly heat up to 780-800°C in 30min, put in degassing agent to degas after melting; and use molybdenum rod to stir slowly with as little damage to the surface oxide layer as possible, stirring time is 2...

Embodiment 2

[0017] Example 2: Al99.80 industrial pure aluminum and customized lanthanum-aluminum (La-Al), cerium-aluminum (Ce-Al) and scandium-aluminum (Sc-Al) master alloys were selected, and the content and mass percentage of each rare earth were respectively were 19.51%, 20.01% and 20.11%. According to the formula of aluminum Al 99.25%, lanthanum La 0.2%, cerium Ce 0.2%, scandium Sc 0.2%, iron Fe 0.1%, respectively weigh industrial pure aluminum, the above three kinds of master alloys and iron ingot raw materials and add them to the intermediate frequency furnace , rapidly heat up to 780-800°C in 30min, put in degassing agent to degas after melting; and use molybdenum rod to stir slowly with as little damage to the surface oxide layer as possible, stirring time is 2-3min; slag to obtain the aluminum alloy liquid, at a temperature of 780-800 ° C, the aluminum alloy liquid is allowed to stand for 30 minutes; during this period, the components are analyzed and replenished; ensure that the...

Embodiment 3

[0018]Embodiment 3: Select Al99.80 industrial pure aluminum and custom-made lanthanum-aluminum (La-Al), cerium-aluminum (Ce-Al) and scandium-aluminum (Sc-Al) master alloys, the content mass percentage of each rare earth is respectively 19.51%, 20.01% and 20.11%. According to the formula aluminum Al98.65%, lanthanum La0.4%, cerium Ce0.4%, scandium Sc0.4%, iron Fe0.1%, respectively weigh industrial pure aluminum, the above three master alloys and iron block raw materials into the intermediate frequency furnace In 30 minutes, the temperature is rapidly raised to 780-800 ° C, and after melting, put in a degasser to degas; and use a molybdenum rod to stir slowly while destroying the surface oxide layer as little as possible, and the stirring time is 2-3 minutes; Slag, to obtain aluminum alloy liquid, at a temperature of 780-800 ° C, the aluminum alloy liquid was left to stand for 30 minutes; during this period, the components were analyzed and fed; the weight percentage of each com...

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Abstract

The invention relates to a high-strength high-conductivity heat-resistant aluminum alloy wire. The wire consists of the following raw materials by weight percent: 98.5 to 99.6% of aluminum Al, 0.1 to 0.4% of lanthanum La, 0.1 to 0.4% of cerium Ce, 0.1 to 0.4 % of scandium Sc, 0.01 to 0.2% of Ferrum Fe, 0.01 to 0.1% of silicon Si, and less than 0.01% of titanium Ti, vanadium V, manganese Mn, chromium Cr and other impurity elements all together. Compared with the aluminum alloy wire in the prior art, the aluminum alloy wire of the invention has high strength and high conductivity simultaneously, the tensile strength reaches over 255 MPa, the electric conductivity can reach over 60.0% IACS (International Annealed Copper Standard), and the high-strength high-conductivity heat-resistant aluminum alloy wire with the heat resistance reaching more than 180 DEG C during long-term running can effectively improve the power transmission capability of conducting wire and simultaneously widen the spacing between conducting wire towers, thereby furthering lowering the investment cost. The aluminum alloy wire has small sag, and the span of an iron tower can be increased by 30% in general. The high-strength high-conductivity heat-resistant aluminum alloy wire can be used in densely populated urban areas. In the process of the invention, both the burning loss of a variety of elements and the oxidation of materials can be reduced by adopting an intermediate frequency furnace for smelting, the smelting time is relatively short so as to raise the productivity, and long-time thermal treatment is not required in the production process, so the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of alloy wire manufacturing, and in particular relates to a high-strength, high-conductivity and heat-resistant aluminum wire used on transmission lines and a manufacturing process thereof. Background technique [0002] In the past, the main component of wires used as power transmission lines in my country was copper. As we all know, my country's copper resources are extremely short, and aluminum resources are very rich. Why do we have to use copper conductors when copper and aluminum can be used in wire and cable? From a foreign point of view, no country has to use copper conductors like my country. Even for high-voltage and ultra-high-voltage power cables, there are countless aluminum conductors. More than 80% of French wires and cables are aluminum conductors, and Japan's aluminum conductors also account for more than 50%. The current application in my country is less than 1%. The main reason for this ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03
Inventor 黄新民吴玉程舒霞郑玉春秦兴国郭建明
Owner 安徽和电普华电气有限公司