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High-conductivity and heat-resistant aluminum alloy and preparation method thereof

A high-conductivity, aluminum alloy technology, applied in conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problems of general heat resistance of high-conductivity aluminum alloy wires, reduce inclusions and porosity defects, and improve heat resistance. and electrical conductivity, the effect of simple control

Active Publication Date: 2019-09-10
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance of the high-conductivity aluminum alloy wire is average and needs to be further improved.

Method used

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Embodiment approach

[0031] As a preferred embodiment of the present invention, the high-conductivity, heat-resistant aluminum alloy is made of the following components in mass percentage: 1.8-2.3%Mg, 1.5-2.1%Si, 0.32-0.41%Ni, 0.12 -0.20% Co, 0.13-0.18% Zr, 0.2-0.3% Y, the balance is Al and unavoidable impurities with a total content of ≤0.03%.

[0032] As a preferred embodiment of the present invention, the high-conductivity, heat-resistant aluminum alloy is made of the following components in mass percentage: 2.1%Mg, 1.8%Si, 0.35%Ni, 0.16%Co, 0.14%Zr , 0.23%Y, and the balance is Al and unavoidable impurities with a total content of ≤0.03%.

[0033] The present invention also provides a method for preparing the above-mentioned high-conductivity, heat-resistant aluminum alloy, comprising the following steps:

[0034] S1: Prepare aluminum ingots and intermediate alloys of other elements, melt the aluminum ingots into molten aluminum, keep the temperature of the molten aluminum above 730°C, pass ni...

Embodiment 1

[0045] High conductivity, heat-resistant aluminum alloy, made of the following components by mass percentage: 2.1%Mg, 1.8%Si, 0.35%Ni, 0.16%Co, 0.14%Zr, 0.23%Y, the balance is Al and the total content ≤0.03% of unavoidable impurities.

[0046] The preparation method of the above-mentioned high-conductivity, heat-resistant aluminum alloy comprises the following steps:

[0047] S1: Prepare aluminum ingots and intermediate alloys of other elements, melt the aluminum ingots into molten aluminum, keep the temperature of the molten aluminum at 730°C, pass nitrogen gas twice to remove impurities, keep the temperature for 10 minutes, and add the other elements Intermediate alloy, and the aluminum alloy melt is heated to 805 °C, and after it is completely melted, it is refined;

[0048] S2: Pour the aluminum alloy melt obtained in step S1 into a mold, and cool it rapidly after solidification;

[0049] S3: performing solution treatment, extrusion treatment and aging treatment on the a...

Embodiment 2

[0057] High conductivity, heat-resistant aluminum alloy, made of the following components by mass percentage: 1.8%Mg, 1.5%Si, 0.32%Ni, 0.12%Co, 0.13%Zr, 0.2%Y, the balance is Al and the total content ≤0.03% of unavoidable impurities.

[0058] The preparation method of the above-mentioned high-conductivity, heat-resistant aluminum alloy comprises the following steps:

[0059] S1: Prepare aluminum ingots and intermediate alloys of other elements, melt the aluminum ingots into molten aluminum, keep the temperature of the molten aluminum at 735°C, pass nitrogen gas twice to remove impurities, keep the temperature for 12 minutes, and add the amount of other elements Intermediate alloy, and heat up the aluminum alloy melt to 808°C, after it is completely melted, refine it;

[0060] S2: Pour the aluminum alloy melt obtained in step S1 into a mold, and cool it rapidly after solidification;

[0061] S3: performing solution treatment, extrusion treatment and aging treatment on the alu...

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Abstract

The invention relates to a high-conductivity and heat-resistant aluminum alloy and a preparation method thereof, and belongs to the technical field of aluminum-based alloys. The aluminum alloy is prepared from, by mass, 1.5-3.2% of Mg, 0.7-2.8% of Si, 0.2-0.5% of Ni, 0.06-0.25% of Co, 0.1-0.2% of Zr, 0.1-0.4% of Y, and the balance Al and inevitable impurities with the total content of less than orequal to 0.03%. The conductivity and the heat resistance of the high-conductivity and heat-resistant aluminum alloy can be remarkably improved, so that the aluminum alloy better meets the requirements of high-voltage transmission.

Description

technical field [0001] The invention belongs to the technical field of aluminum-based alloys, and in particular relates to a high-conductivity, heat-resistant aluminum alloy and a preparation method thereof. Background technique [0002] Electrical copper and aluminum are the main conductor materials of wire and cable. China has few copper resources and its dependence on foreign countries is as high as 70%, while China has abundant aluminum resources and a high self-sufficiency rate. In recent years, my country has vigorously advocated "using aluminum to save copper", and successively issued "GB / T30552-2014 Aluminum Alloy Wire for Cable Conductors", "NB / T42051-2015 Rated Voltage 0.6 / 1kV Aluminum Alloy Conductor XLPE Insulated Cable ", "GBT31840-2015 Rated Voltage 1kV to 35kV Aluminum Alloy Core Extruded Insulated Power Cable" and many other aluminum alloy cable standards. The aluminum alloy conductor composition numbers (1-6) involved in these standards are the same as the ...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/02C22C1/03C22C1/06C22F1/043C22F1/047C22F1/05H01B1/02
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05H01B1/023
Inventor 耿进锋史红伟李红英孙建华时洪飞崔大田姚德贵肖寒钟恩涛
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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