High conductivity moderately strong heat-resistant aluminum alloy monofilament and preparation method thereof

A technology of aluminum alloy monofilament and aluminum alloy rod, which is applied in the direction of metal/alloy conductor, root rod/rod/wire/strip conductor, etc. It can solve the problem of low conductivity, low tensile strength and heating temperature of aluminum alloy wire or wire. Advanced problems, to achieve the effect of cost saving, good heat resistance, high conductivity

Active Publication Date: 2013-04-17
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of the above-mentioned application, the prepared aluminum alloy wire or wire has low conductivity and low tensile strength, and the heating temperature required in the preparation process is high and heat treatment is required, and the production cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add pure aluminum ingots with a purity of 99.8% to the medium frequency induction melting furnace, and melt the pure aluminum before keeping the temperature at 720°C. In the order of Mn, V, Ti, Cr, Zr, Er, Y, each alloy element is added in turn, so that their final content is: 0.05% Zr by mass fraction, 0.02% Er, 0.1% Y, 0.05% B , 0.03% of Si, 0.055% of Fe, 0.1% of V, 0.02% of Ti, 0.1% of Cr and 0.25% of Mn, the alloy elements are added in the form of master alloy, after stirring, refining, slag removal, in Cast at 760°C after holding for 40 minutes. Before casting, heat the low-carbon steel mold to 200°C, keep it warm for 10 minutes, and lower the temperature of the molten aluminum to 740°C, then pour the molten aluminum into the mold to form an aluminum alloy ingot, and heat-extrude the aluminum alloy rod through an extrusion machine Pressing, the extrusion temperature is 150°C. The extruded rods are molded sequentially, and then cold-drawn on a high-speed wire-draw...

Embodiment 2

[0033]Add pure aluminum ingots with a purity of 99.8% to the medium-frequency induction melting furnace, and melt the pure aluminum before keeping the temperature at 720°C. When the temperature rises to 730°C, start to use B, Si, Fe, Mn , V, Ti, Cr, Zr, Er, Y in the order, add each alloy element in turn, so that their final content is: 0.09% of Zr, 0.03% of Er, 0.09% of Y, 0.08% of B, 0.05% of Si, 0.07% of Fe, 0.11% of V, 0.04% of Ti, 0.12% of Cr and 0.3% of Mn, the alloy elements are added in the form of simple substances, after stirring, refining, slag removal, at 750 ℃ Next, after 45 minutes of heat preservation, casting is carried out. Before casting, heat the low-carbon steel mold to 210°C and keep it warm for 20 minutes, then pour the aluminum liquid into the mold, lower the temperature of the aluminum liquid to 740°C, form an aluminum alloy ingot, and heat-extrude the aluminum alloy rod through an extrusion machine , The extrusion temperature is 150°C. The extruded ro...

Embodiment 3

[0035] Add pure aluminum ingots with a purity of 99.8% to the medium frequency induction melting furnace, and melt the pure aluminum before keeping the temperature at 720°C. In the order of Mn, V, Ti, Cr, Zr, Er, Y, each alloy element is added in turn, so that their final content is: 0.07% Zr by mass fraction, 0.10% Er, 0.12% Y, 0.15% B , 0.15% of Si, 0.21% of Fe, 0.12% of V, 0.05% of Ti, 0.14% of Cr and 0.5% of Mn, among which the rare earth elements are added in the form of master alloys, and the rest of the alloy elements are in the form of master alloys It is added in form, stirred, refined and slag-removed, and then cast at 755°C for 50 minutes. Before casting, heat the low-carbon steel mold to 200°C, keep it warm for 30 minutes, lower the temperature of the aluminum liquid to 740°C, then pour the aluminum liquid into the mold to form an aluminum alloy ingot, and heat-extrude the aluminum alloy rod through an extrusion machine , The extrusion temperature is 150°C. The e...

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Abstract

The invention relates to the technical field of a power industry electric transmission line overhead conductor. The present invention provides a high conductivity moderately strong heat-resistant aluminum alloy monofilament and a preparation method thereof. The aluminum alloy conductor includes: 0.01-0.1% of Zr, 0.01-0.2% of B, 0.01-0.2% of Si, 0.05-0.3% of Fe, 0.2-0.5% of Mn, 0.01-0.15% of Er and/or 0.01-0.15% of Y, any two or three elements selected from the group consisting of V, Ti and Cr, and the balance being Al and inevitable trace impurities, wherein 0.1-0.15% of V, 0.01-0.05%of Ti, and 0.1-0.15% of Cr are included. The aluminum alloy monofilament prepared by the present invention is high in electrical conductivity, good in heat resistance, and high in tensile strength.

Description

【Technical field】 [0001] The invention belongs to the technical field of transmission line overhead conductors in the electric power industry, and specifically relates to a high-conductivity, medium-strong heat-resistant aluminum alloy monofilament and a preparation method thereof. 【Background technique】 [0002] Traditionally, the steel-cored aluminum stranded wires used in overhead transmission lines mostly use heat-resistant aluminum alloy wires due to the limitation of heat resistance. In order not to reduce the strength and increase the sag of the wire during long-term operation at normal operating temperature, trace alloy elements such as zirconium and titanium are usually added to electrical pure aluminum to increase the recrystallization temperature of aluminum to improve the heat resistance of aluminum. However, although the addition of zirconium and titanium alloy elements ensures heat resistance, it causes a decrease in the conductivity of the aluminum wire. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03B21C1/00H01B1/02H01B5/02
Inventor 杨富尧韩钰马光陈新祝志祥
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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