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High-conductivity heat-resistant aluminum alloy monofilament for overhead conductor and preparation method thereof

A technology of aluminum alloy monofilament and high conductivity, which is applied in the direction of conductive materials, conductive materials, metal/alloy conductors, etc., and can solve the problems of large transmission line loss, low safety margin, and low conductivity

Inactive Publication Date: 2020-10-20
STATE GRID LIAONING ELECTRIC POWER CO LTD SHENYANG POWER +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a heat-resistant aluminum alloy monofilament material with high conductivity and high strength for overhead wires in the electric power industry, so as to solve the problem of low conductivity of conventional 60% IACS heat-resistant aluminum alloy wires and problems of transmission lines. The problems of large loss, low tensile strength, low safety margin and high preparation cost

Method used

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  • High-conductivity heat-resistant aluminum alloy monofilament for overhead conductor and preparation method thereof
  • High-conductivity heat-resistant aluminum alloy monofilament for overhead conductor and preparation method thereof
  • High-conductivity heat-resistant aluminum alloy monofilament for overhead conductor and preparation method thereof

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Effect test

Embodiment 1

[0037] High conductivity and heat-resistant aluminum alloy monofilament for overhead wires, the composition and weight percentage are:

[0038]

[0039] The preparation method is as follows: each alloying element is added to the industrially pure aluminum ingot melt with a purity of 99.7%, so that their final contents are as shown above. Alloying elements B, Zr, La, and Cu are added in the form of Al-B, Al-Zr, Al-La, and Al-Cu master alloys. The aluminum alloy ingot is formed by casting in a copper mold; the aluminum alloy ingot is hot-rolled by a rolling mill, and the rolled aluminum alloy round rod adopts a conventional aluminum monofilament preparation process, and the mold is sequentially matched, and the wire is drawn on a high-speed wire drawing machine. The aluminum alloy monofilament has a diameter of 3.05mm, an electrical conductivity of 61.2% IACS, a tensile strength of 189.2MPa, an elongation of 2.42%, and a heat resistance of 91.8%.

Embodiment 2

[0041] High conductivity and heat-resistant aluminum alloy monofilament for overhead wires, the composition and weight percentage are:

[0042]

[0043]

[0044] The preparation method is as follows: each alloying element is added to the industrially pure aluminum ingot melt with a purity of 99.7%, so that their final contents are as shown above. Alloying elements B, Zr, La, and Cu are added in the form of Al-B, Al-Zr, Al-La, and Al-Cu master alloys. The aluminum alloy ingot is formed by casting in a copper mold; the aluminum alloy ingot is hot-rolled by a rolling mill, and the rolled aluminum alloy round rod adopts a conventional aluminum monofilament preparation process, and the mold is sequentially matched, and the wire is drawn on a high-speed wire drawing machine. The aluminum alloy monofilament has a diameter of 3.15mm, an electrical conductivity of 61.3% IACS, a tensile strength of 186.4MPa, an elongation of 2.35%, and a heat resistance of 92.2%.

Embodiment 3

[0046] High conductivity and heat-resistant aluminum alloy monofilament for overhead wires, the composition and weight percentage are:

[0047]

[0048] The preparation method is as follows: each alloying element is added to the industrially pure aluminum ingot melt with a purity of 99.7%, so that their final contents are as shown above. Alloying elements B, Zr, La, and Cu are added in the form of Al-B, Al-Zr, Al-La, and Al-Cu master alloys. The aluminum alloy ingot is formed by casting in a copper mold; the aluminum alloy ingot is hot-rolled through a rolling mill, and the rolled aluminum alloy round rod adopts a conventional aluminum monofilament preparation process, and the mold is sequentially matched, and the wire is drawn on a high-speed wire drawing machine. The aluminum alloy monofilament has a diameter of 3.22mm, an electrical conductivity of 61.4% IACS, a tensile strength of 185.2MPa, an elongation of 2.45%, and a heat resistance of 92.6%.

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Abstract

The invention discloses a high-conductivity heat-resistant aluminum alloy monofilament for an overhead conductor and a preparation method of the high-conductivity heat-resistant aluminum alloy monofilament, wherein the high-conductivity heat-resistant aluminum alloy monofilament for the overhead conductor comprises the following components in percentage by weight, including 0.001-0.02% of B, 0.005-0.04% of Zr, 0.001-0.05% of Cu, 0.001-0.10% of La, 0.001-0.06% of Si, 0.001-0.12% of Fe, not more than 0.0085% of (V + Ti + Cr + Mn) and the balance of aluminum and inevitable impurities. According to the aluminum alloy monofilament prepared through the preparation method, the conductivity is larger than or equal to 61.0% IACS, the tensile strength is larger than or equal to 180 MPa, the ductility is larger than 2.3%, and the heat-resisting temperature is larger than or equal to 150 DEG C (the strength residual rate is larger than 90% after the aluminum alloy monofilament is heated for 1 h at230 DEG C).

Description

technical field [0001] The invention belongs to the technical field of transmission line overhead wires in the electric power industry, and relates to an IACS with conductivity ≥ 61.0%, tensile strength ≥ 180 MPa, elongation > 2.3%, and heat-resistant temperature ≥ 150°C (after heating at 230°C for 1 hour, the strength residual rate is greater than 90%) high-conductivity heat-resistant aluminum alloy monofilament for overhead wires and a preparation method thereof. Background technique [0002] In order to alleviate the serious imbalance of power resources and power load distribution, the country has successively launched major power transmission projects such as UHV. With the increase of power transmission capacity and distance, power transmission lines are developing in the direction of large capacity and high efficiency. Performance, heat resistance and other service performance put forward higher and higher requirements. The electrical conductivity of common ACSR is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/14C22C1/06C22C1/03B21C37/04H01B1/02
CPCB21C37/047C22C1/026C22C1/03C22C1/06C22C21/00C22C21/02C22C21/14H01B1/023
Inventor 胡博杨长龙许超孙建锋祝志祥李希元段昊刘东延李小兰杨祖民陈保安张强周杨丁一付颖周鑫陈云郝文魁陈新郑舒文谭澈徐玉林夏荣臻
Owner STATE GRID LIAONING ELECTRIC POWER CO LTD SHENYANG POWER