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High-conductivity corrosion-resistant aluminum alloy monofilament for overhead conductor and preparation method of high-conductivity corrosion-resistant aluminum alloy monofilament

A technology of aluminum alloy monofilament and aluminum alloy, which is applied in the field of overhead conductors of transmission lines in the electric power industry, can solve the problems of large transmission loss, low conductivity, and weak corrosion resistance, and achieve low cost, high conductivity, and simplified preparation The effect of craft

Active Publication Date: 2021-11-12
JIANGSU ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a high-conductivity corrosion-resistant aluminum alloy monofilament for overhead wires and its preparation method, and solve the problem of low conductivity and power transmission loss of common 61% IACS steel-cored aluminum stranded wires in active service Large technical problems with poor corrosion resistance

Method used

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  • High-conductivity corrosion-resistant aluminum alloy monofilament for overhead conductor and preparation method of high-conductivity corrosion-resistant aluminum alloy monofilament
  • High-conductivity corrosion-resistant aluminum alloy monofilament for overhead conductor and preparation method of high-conductivity corrosion-resistant aluminum alloy monofilament

Examples

Experimental program
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Effect test

Embodiment 1

[0033] An aluminum alloy monofilament material, the components and their mass percentages are:

[0034] B 0.020%

[0035] Mg 0.056%

[0036] Sc 0.025%

[0037] Gd 0.050%

[0038] Cr+Mn+V+Ti 0.007%

[0039] Fe 0.010%

[0040] Si 0.070%

[0041] Al and unavoidable impurity balance.

[0042] Its preparation method is as follows:

[0043] Step 1. Add various alloying elements to industrial pure aluminum with a purity of 99.85% Al, so that their final content is as shown above. The alloying elements are based on Al-B, Al-Mg, Al-Sc, Al-Gd master alloys The form is added in a frequency induction furnace for smelting, and the melting temperature is kept at 730°C. After the aluminum ingot is completely melted, the Al-B intermediate alloy is added at 740°C for boronization treatment; ℃, add Al-Mg master alloy, Al-Sc master alloy and Al-Gd master alloy in turn. After the master alloy is completely melted, electromagnetically stir the aluminum alloy solution for 15 minutes each ti...

Embodiment 2

[0050] An aluminum alloy monofilament material, the components and their mass percentages are:

[0051] B 0.023%

[0052] Mg 0.065%

[0053] Sc 0.032%

[0054] Gd 0.036%

[0055] Cr+Mn+V+Ti 0.007%

[0056] Fe 0.095%

[0057] Si 0.068%

[0058] Al and unavoidable impurity balance.

[0059] Its preparation method is as follows:

[0060] Step 1. Add various alloying elements to industrial pure aluminum with a purity of 99.85% Al, so that their final content is as shown above. The alloying elements are based on Al-B, Al-Mg, Al-Sc, Al-Gd master alloys The form is added in a frequency induction furnace for melting, and the melting temperature is kept at 740°C. After the aluminum ingot is completely melted, the Al-B intermediate alloy is added at 745°C for boronization treatment; ℃, add Al-Mg master alloy, Al-Sc master alloy and Al-Gd master alloy in turn. After the master alloy is completely melted, electromagnetically stir the aluminum alloy solution for 20 minutes each tim...

Embodiment 3

[0067] An aluminum alloy monofilament material, the components and their mass percentages are:

[0068] B 0.026%

[0069] Mg 0.078%

[0070] Sc 0.038%

[0071] Gd 0.020%

[0072] Cr+Mn+V+Ti 0.006%

[0073] Fe 0.009%

[0074] Si 0.062%

[0075] Al and unavoidable impurity balance.

[0076] Its preparation method is as follows:

[0077] Step 1. Add various alloying elements to industrial pure aluminum with a purity of 99.85% Al, so that their final content is as shown above. The alloying elements are based on Al-B, Al-Mg, Al-Sc, Al-Gd master alloys The form is added in a frequency induction furnace for melting, and the melting temperature is kept at 740°C. After the aluminum ingot is completely melted, the Al-B intermediate alloy is added at 750°C for boronization treatment; ℃, add Al-Mg master alloy, Al-Sc master alloy and Al-Gd master alloy in turn. After the master alloy is completely melted, electromagnetically stir the aluminum alloy solution for 20 minutes each tim...

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Abstract

The invention discloses a high-conductivity corrosion-resistant aluminum alloy monofilament for an overhead conductor and a preparation method of the high-conductivity corrosion-resistant aluminum alloy monofilament. The high-conductivity corrosion-resistant aluminum alloy monofilament comprises the following components in percentage by mass: 0.005 to 0.03 percent of B, 0.005 to 0.10 percent of Mg, 0.005 to 0.05 percent of Sc, 0.005 to 0.05 percent of Gd, less than or equal to 0.07 percent of Si, less than or equal to 0.10 percent of Fe, less than or equal to 0.007 percent of (V+Ti+Cr+Mn) and the balance of aluminum and inevitable impurities. Al with the purity of 99.85% is adopted as a raw material, on the basis that impurity elements are strictly purified and controlled by adding a proper amount of B element for boronizing treatment, trace Mg, Sc and Gd alloying elements are added, a duralumin monofilament which is high in electric conductivity, resistant to corrosion, low in cost and small in power transmission loss can be prepared, so that the electric energy transmission efficiency and safe operation level of an overhead transmission line are improved, and the transmission line loss and operation maintenance cost are reduced.

Description

technical field [0001] The invention relates to a high-conductivity corrosion-resistant aluminum alloy monofilament for overhead wires and a preparation method thereof, belonging to the technical field of transmission line overhead wires in the electric power industry. Background technique [0002] To build a new type of power system with new energy as the main body, to help achieve the goal of "double carbon", the demand for power grid energy saving and emission reduction, quality improvement and efficiency increase is more urgent, and it is required to develop more energy-saving and economical transmission technology to increase the transmission capacity of transmission lines and reduce transmission loss. According to statistics, the national line loss rate in 2020 is 5.62%, and the annual loss of line power is equivalent to 3.7 times the annual power generation of the Three Gorges Power Station (111.8 billion kWh). By 2030, the total installed capacity of wind power and ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03C22C1/06C22F1/04
CPCC22C21/00C22C1/03C22C1/06C22C1/026C22F1/04
Inventor 徐鑫乾刘建军夏睿杨立恒徐铼陈大兵袁光宇郭东亮李鸿泽高超
Owner JIANGSU ELECTRIC POWER CO
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