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High-conductivity rare earth duralumin monofilament material for overhead conductors

A high-conductivity, overhead wire technology, applied in the direction of metal/alloy conductors, etc., can solve the problems that cannot meet the market demand of overhead aluminum wires, high transmission line loss, strength and surface hardness hinder the promotion and use, etc.

Active Publication Date: 2015-09-30
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The conductivity of the existing duralumin conductor material for conventional steel-cored aluminum stranded wire is 61% IACS, and its transmission line loss is relatively high, while the ultimate conductivity of pure aluminum is about 64% IACS, but this kind of electrical pure aluminum cannot Meet the current market demand for overhead aluminum conductors, and its cost is about 1.5 times higher than that of ordinary pure aluminum ingots
[0003] The existing 63% IACS high-conductivity annealed aluminum wire has defects in strength and surface hardness, which hinder its popularization and use

Method used

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  • High-conductivity rare earth duralumin monofilament material for overhead conductors
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  • High-conductivity rare earth duralumin monofilament material for overhead conductors

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Experimental program
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Effect test

Embodiment 1

[0031] A high-conductivity rare earth duralumin monofilament material for overhead wires, the components and their mass percentages are:

[0032]

[0033]Each alloying element is added to a pure aluminum ingot with a purity of 99.7%, so that their final content is as shown above, and the alloying element is added in the form of Al-B, Al-Er, and Al-Y master alloys. The hard aluminum alloy ingot is formed by casting in a red copper mold; the aluminum alloy rod is hot-rolled through a rolling mill; the rolled round rod adopts the conventional aluminum monofilament preparation process, and the mold is sequentially matched, and the cold drawing is carried out on a high-speed wire drawing machine. The diameter of the duralumin monofilament is 3.05mm, the conductivity is 63.08%IACS, the tensile strength is 168.12MPa, and the elongation is 2.48%.

Embodiment 2

[0035] A high-conductivity rare earth duralumin monofilament material for overhead wires, the components and their mass percentages are:

[0036]

[0037] Each alloying element is added to a pure aluminum ingot with a purity of 99.7%, so that their final content is as shown above, and the alloying element is added in the form of Al-B, Al-Er, and Al-Y master alloys. The hard aluminum alloy ingot is formed by casting in a red copper mold; the aluminum alloy rod is hot-rolled through a rolling mill; the rolled round rod adopts the conventional aluminum monofilament preparation process, and the mold is sequentially matched, and the cold drawing is carried out on a high-speed wire drawing machine. The diameter of the duralumin monofilament is 3.35mm, the conductivity is 63.24%IACS, the tensile strength is 167.28MPa, and the elongation is 2.50%.

Embodiment 3

[0039] A high-conductivity rare earth duralumin monofilament material for overhead wires, the components and their mass percentages are:

[0040]

[0041] Each alloying element is added to a pure aluminum ingot with a purity of 99.7%, so that their final content is as shown above, and the alloying element is added in the form of Al-B, Al-Er, and Al-Y master alloys. The hard aluminum alloy ingot is formed by casting in a red copper mold; the aluminum alloy rod is hot-rolled through a rolling mill; the rolled round rod adopts the conventional aluminum monofilament preparation process, and the mold is sequentially matched, and the cold drawing is carried out on a high-speed wire drawing machine. The diameter of the duralumin monofilament is 3.50mm, the conductivity is 63.27%IACS, the tensile strength is 166.56MPa, and the elongation is 2.62%.

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Abstract

The invention discloses a high-conductivity rare earth duralumin monofilament material for overhead conductors. The high-conductivity rare earth duralumin monofilament material comprises 0.002-0.05% of B, 0.02-0.20% of Er, 0.02-0.20% of Y, 0-0.060% of Si, 0-0.140% of Fe, 0.01% or less of V+Ti+Cr+Mn, and the balance of Al and inevitable impurity elements. The conductivity of the duralumin monofilament material prepared through adding a tiny amount of alloyage elements and optimally controlling the components of alloy is greater than 63.0% IACS, the tensile strength is greater than 165MPa, and the normal temperature mechanical properties and electrical performances can meet high-conductivity duralumin conductor requirements, so the high-conductivity rare earth duralumin monofilament material can be used in the field of overhead conductors in the electric power industry in order to meet energy saving and consumption reduction demands.

Description

【Technical field】 [0001] The invention relates to an overhead wire of a power transmission line in the electric power industry, in particular to a high-conductivity rare earth duralumin monofilament material for an overhead wire with a conductivity ≥ 63.0% IACS, a tensile strength ≥ 165 MPa, and an elongation ≥ 2.0%. 【Background technique】 [0002] The conductivity of the existing duralumin conductor material for conventional steel-cored aluminum stranded wire is 61% IACS, and its transmission line loss is relatively high, while the ultimate conductivity of pure aluminum is about 64% IACS, but this kind of electrical pure aluminum cannot It meets the current market demand for overhead aluminum conductors, and its cost is about 1.5 times that of ordinary pure aluminum ingots. [0003] The existing 63% IACS high-conductivity annealed aluminum wire has defects in strength and surface hardness, which hinder its popularization and use. Through grain refinement, low-defect contro...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/02C22C1/03H01B1/02
Inventor 祝志祥陈保安韩钰张强马光聂京凯潘学东王晓芳赵蕊杨富尧陈新刘东雨冯砚厅杨长龙于鑫刘君杨印符少朋
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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