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High-strength, high-conductivity and heat-resistant aluminum alloy conductor material and preparation method thereof

A technology of aluminum alloy conductor and high conductivity, applied in the direction of metal/alloy conductor, etc., can solve the problem of low strength

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN102230113A discloses a kind of Al-Er-Zr alloy conductor, due to the problem of its composition ratio, its conductivity and heat resistance are better, but its strength is lower

Method used

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  • High-strength, high-conductivity and heat-resistant aluminum alloy conductor material and preparation method thereof
  • High-strength, high-conductivity and heat-resistant aluminum alloy conductor material and preparation method thereof
  • High-strength, high-conductivity and heat-resistant aluminum alloy conductor material and preparation method thereof

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example 1

[0017] Example 1: An alloy ingot was prepared by melting in a graphite crucible and casting in an iron mold. The raw materials used were pure aluminum and Al-6Er and Al-4Zr master alloys, and the melting temperature was 780±10°C. After reaching the melting temperature, keep it warm for 30 minutes, and then cast it with an iron mold. The mass percentage of each element is: 0.20% Zr, 0.25% Er, the content of Fe, Si and other impurities figure 1 The hardness curves of heat treatment at different temperatures are given, indicating that heat treatment at 200-300°C for 3 hours after rolling can reach the highest hardness, and treatment at higher temperatures will reduce the strength of the alloy. The electrical conductivity of the alloy after heat treatment is above 60% IACS, and has high electrical conductivity.

example 2

[0018] Example 2: An alloy ingot was prepared by melting in a graphite crucible and casting in an iron mold. The raw materials used were pure aluminum and Al-6Er and Al-4Zr master alloys, and the melting temperature was 780±10°C. After reaching the melting temperature, keep it warm for 30 minutes, and then cast it with an iron mold. The mass percentage of each element is: 0.30% Zr, 0.25% Er, Fe, Si and other impurity content figure 2 The hardness curves of heat treatment at different temperatures are given. It shows that heat treatment at 200~300℃ for 3 hours after rolling can reach the highest hardness, and the treatment at higher temperature will make the strength of the alloy decrease. The electrical conductivity of the alloy after heat treatment is above 59.5% IACS, and has high electrical conductivity.

example 3

[0019] Example 3: Alloy ingots were prepared by graphite crucible melting and iron mold casting. The raw materials used were pure aluminum and Al-6Er and Al-4Zr master alloys, and the melting temperature was 780±10°C. After reaching the melting temperature, keep it warm for 30 minutes, and then cast it with an iron mold. The mass percentage of each element is: 0.28% Zr, 0.15% Er, the content of Fe, Si and other impurities image 3 The hardness curves of heat treatment at different temperatures are given, indicating that heat treatment at 200-300°C for 3 hours after rolling can reach the highest hardness, and treatment at higher temperatures will reduce the strength of the alloy. The electrical conductivity of the alloy after heat treatment is above 59.8% IACS, and has high electrical conductivity.

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Abstract

The invention relates to a high-strength, high-conductivity and heat-resistant aluminum alloy conductor material and a preparation method thereof, and belongs to the technical field of alloy materials. The conductor material comprises the following components in percentage by weight: 0.2 to 0.3 percent of Zr, 0.15 to 0.25 percent of Er, less than 0.3 percent of impurities and the balance of aluminum. The preparation method comprises the following steps of: adding an AlEr intermediate alloy and an AlZr intermediate alloy in the process of smelting the aluminum, smelting at the temperature of 780+ / -10 DEG C, preserving heat for 30 minutes, and casting; and performing homogenization treatment, rolling and heat treatment on an ingot in turn. Er and Zr in the component ratio are compositely microalloyed, a large number of precipitated phases which are distributed in a dispersed mode can be precipitated by the process, a large number of deformation structures can be stored, and the high conductivity (59.6 to 60 percent international annealed copper standard IACS), high strength (Vickers hardness 62.5 to 66.5) and heat resistance (capability of resisting the temperature of 375 DEG C in a short term and resisting the temperature of 225 DEG C in a long term) of the alloy are kept simultaneously.

Description

technical field [0001] The invention relates to a high-strength and high-conductivity heat-resistant aluminum alloy conductor material for electric wires and cables, which belongs to the technical field of alloy materials. technical background [0002] High-strength heat-resistant electrical aluminum alloy is an aluminum alloy conductor material with high tensile strength and good heat resistance. After being made into a wire, it has high service temperature, good heat resistance, large carrying capacity and high tensile strength. , light weight, good sag characteristics, excellent welding performance and corrosion resistance, etc., so the use of high-strength heat-resistant aluminum alloy stranded wires on transmission lines can significantly increase line capacity, and can avoid the problems caused by steel-reinforced aluminum stranded wires. Corrosion problems and hysteresis loss have been widely concerned in the world. However, according to the IEC 62004 standard, the c...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03H01B1/02
Inventor 聂祚仁李燕文胜平高坤元黄晖
Owner BEIJING UNIV OF TECH
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