Intermediate strength aluminum alloy wire for overhead conductor

A medium-strength aluminum alloy, overhead wire technology, used in metal/alloy conductors, conductors, conductive materials, etc.

Active Publication Date: 2013-12-18
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose is to understand the problem that the elongation of medium-strength aluminum alloy wire is too small and insufficient

Method used

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  • Intermediate strength aluminum alloy wire for overhead conductor

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Experimental program
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Effect test

Embodiment 1

[0044] Aluminum ingots, aluminum-silicon alloy ingots, aluminum-magnesium master alloys, aluminum-copper master alloys and aluminum-yttrium master alloys are selected as raw materials.

[0045] The composition requirements of aluminum ingots are as follows ： Silicon ≤ 0.07wt%, iron ≤ 0.23wt%, magnesium ≤ 0.02wt%, (manganese + titanium + chromium + vanadium) ≤ 0.02wt%, and the content of each other impurity element is not more than 0.03wt%.

[0046] The silicon content in the aluminum-silicon master alloy is 20wt%, the magnesium content in the aluminum-magnesium master alloy is 50wt%, the copper content in the aluminum-copper master alloy is 10wt%, and the yttrium content in the aluminum-yttrium master alloy is 10wt%.

[0047] according to figure 1 In the process flow shown, the aluminum ingot is melted in the melting furnace, and then flows into the holding furnace for heat preservation. Add the amount of aluminum-silicon, aluminum-magnesium, aluminum-copper and aluminum-yt...

Embodiment 2

[0057] Aluminum ingots, aluminum-silicon alloy ingots, aluminum-magnesium master alloys, aluminum-copper master alloys and aluminum-yttrium master alloys are selected as raw materials.

[0058] The composition requirements of aluminum ingots are as follows: silicon ≤ 0.40wt%, iron ≤ 0.18wt%, magnesium ≤ 0.48wt%, (manganese + titanium + chromium + vanadium) ≤ 0.02wt%, and the content of each other impurity element is not more than 0.03wt% %. The silicon content in the aluminum-silicon master alloy is 20wt%, the magnesium content in the aluminum-magnesium master alloy is 50wt%, the copper content in the aluminum-copper master alloy is 10wt%, and the yttrium content in the aluminum-yttrium master alloy is 10wt%.

[0059] according to figure 1 In the process flow shown, the aluminum ingot is melted in the melting furnace, and then flows into the holding furnace for heat preservation. Add the amount of aluminum-silicon, aluminum-magnesium, aluminum-copper and aluminum-yttrium ma...

Embodiment 3

[0069] Aluminum ingots, aluminum-silicon alloy ingots, aluminum-magnesium master alloys, aluminum-copper master alloys and aluminum-yttrium master alloys are selected as raw materials.

[0070] The composition requirements of aluminum ingots are as follows: silicon ≤ 0.50wt%, iron ≤ 0.20wt%, magnesium ≤ 0.50wt%, (manganese + titanium + chromium + vanadium) ≤ 0.02wt%, and the content of each other impurity element is not more than 0.03wt% %. The silicon content in the aluminum-silicon master alloy is 20wt%, the magnesium content in the aluminum-magnesium master alloy is 50wt%, the copper content in the aluminum-copper master alloy is 10wt%, and the yttrium content in the aluminum-yttrium master alloy is 10wt%.

[0071] according to figure 1 In the process flow shown, the aluminum ingot is melted in the melting furnace, and then flows into the holding furnace for heat preservation. Add the amount of aluminum-silicon, aluminum-magnesium, aluminum-copper and aluminum-yttrium ma...

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Abstract

The invention belongs to the technical field of overhead conductors of electric transmission lines, and particularly relates to an intermediate strength aluminum alloy wire for an overhead conductor. According to the intermediate strength aluminum alloy wire provided by the invention, solution treatment is effectively carried out on an aluminum alloy rod and subsequent aging treatment realizes a better effect through certain alloy composition adjustment, rolling and control of online quenching, so that the intermediate strength aluminum alloy wire with the elongation which is not less than 3.5%, the electric conductivity which is not less than 58.5%IACS (International Annealed Copper Standard) and the tensile strength which is not less than 245MPa is finally obtained. The elongation of the intermediate strength aluminum alloy wire provided by the invention is remarkably superior to that of aluminum alloy wires in the prior art. The intermediate strength aluminum alloy wire has the advantages that the wire is great in pulling weight ratio, good in sag characteristic, good in high temperature characteristic and damage- resistant in the surface. As no steel cores are available, magnetic hysteresis loss and eddy loss are avoided. In operation, the alternating current resistance of the wire is lower than that of aluminum cable steel reinforced, so that the electric energy loss is reduced. The intermediate strength aluminum alloy wire provided by the invention is used more and more in electric transmission lines and has a wider range of application.

Description

technical field [0001] The invention belongs to the technical field of overhead conductors of power transmission lines, and in particular relates to a medium-strength aluminum alloy wire for overhead conductors. Background technique [0002] At present, the medium-strength aluminum alloys are mainly aluminum-magnesium-silicon alloys. There are two different process routes for manufacturing such alloys, namely artificial aging heat treatment type and natural aging heat treatment type. Patent CN102041418A and patent CN102162050A respectively mentioned two kinds of manufacturing methods of medium-strength aluminum alloy wires with different conductivity. These two methods need to carry out solid solution treatment and quenching treatment after the aluminum alloy rod is prepared. After the aluminum alloy wire is drawn, artificial aging treatment is required, that is, the artificial aging heat treatment process route is adopted. The properties of the medium-strength aluminum all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22F1/05H01B1/02H01B5/02
CPCC22C1/03C22C21/02C22C21/08C22C21/12C22F1/05H01B1/023
Inventor 吴细毛李春和党朋王建东王飞张小辉毛庆传
Owner STATE GRID CORP OF CHINA
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