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High-conductivity medium-strength aluminum alloy single wire and preparing method thereof

A medium-strength aluminum alloy, high conductivity technology, used in temperature control, metal rolling, elongation control, etc., can solve the problems of expensive rare earth elements, low tensile strength of aluminum alloy materials, and achieve excellent overload resistance. and fatigue characteristics, uniform internal temperature, and low stress

Inactive Publication Date: 2019-10-25
XICHUAN COUNTY POWER BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum alloy material obtained in this patent has low tensile strength, and the rare earth elements Er and Y are expensive

Method used

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  • High-conductivity medium-strength aluminum alloy single wire and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] A medium-strength aluminum alloy monofilament with high conductivity, its chemical composition and weight percentage are: Si: 0.12%, Fe: 0.25%, Cu: 0.1%, Mg: 0.33%, Bi: 0.03%, Sr: 0.1%, B: 0.04%, Mn+Ti+Cr+V≤0.01%, the balance is Al.

[0035] The preparation method of the above-mentioned high-conductivity and medium-strength aluminum alloy monofilament comprises the following steps:

[0036] (1) Smelting: Add aluminum ingots to an intermediate frequency induction furnace to melt at 750°C, add Al-B master alloy, stir for 15 minutes after melting, and let stand for 20 minutes; keep the temperature at 750°C, and continue to add Al-Si, Al-Fe, Al- For Cu, Al-Bi, Al-Sr master alloys, stir for 10 minutes after melting, let stand for 25 minutes, and finally add pure Mg ingot, stir for 20 minutes after melting, let stand for 25 minutes;

[0037] (2) Degassing: Blowing in N 2 Carry out refining, blowing time is 5min, stand still for 20min, remove slag, obtain aluminum alloy liquid...

Embodiment 2

[0046] A medium-strength aluminum alloy monofilament with high conductivity, its chemical composition and weight percentage are: Si: 0.15%, Fe: 0.3%, Cu: 0.05%, Mg: 0.4%, Bi: 0.07%, Sr: 0.06%, B: 0.03%, Mn+Ti+Cr+V≤0.01%, the balance is Al.

[0047] The preparation method of the above-mentioned high-conductivity and medium-strength aluminum alloy monofilament comprises the following steps:

[0048] (1) Smelting: Add aluminum ingots to an intermediate frequency induction furnace to melt at 740°C, add Al-B master alloy, stir for 10 minutes after melting, and let stand for 25 minutes; keep the temperature at 740°C, continue to add Al-Si, Al-Fe, Al- For Cu, Al-Bi, Al-Sr intermediate alloys, stir for 15 minutes after melting, and let stand for 30 minutes, finally add pure Mg ingot, stir for 10 minutes after melting, let stand for 30 minutes;

[0049] (2) Degassing: Blowing in N 2 Carry out refining, blowing time is 8 minutes, stand still for 30 minutes, remove slag, obtain aluminu...

Embodiment 3

[0058] A medium-strength aluminum alloy monofilament with high conductivity, its chemical composition and weight percentage are: Si: 0.18%, Fe: 0.22%, Cu: 0.2%, Mg: 0.36%, Bi: 0.09%, Sr: 0.08%, B: 0.05%, Mn+Ti+Cr+V≤0.01%, the balance is Al.

[0059] The preparation method of the above-mentioned high-conductivity and medium-strength aluminum alloy monofilament comprises the following steps:

[0060] (1) Smelting: Put the aluminum ingot into an intermediate frequency induction furnace to melt at 730°C, add Al-B master alloy, stir for 20 minutes after melting, and let it stand for 30 minutes; keep the temperature at 730°C, and continue to add Al-Si, Al-Fe, Al- For Cu, Al-Bi, Al-Sr intermediate alloys, stir for 15 minutes after melting, and let stand for 25 minutes, and finally add pure Mg ingot, stir for 15 minutes after melting, let stand for 25 minutes;

[0061] (2) Degassing: Blowing in N 2 Carry out refining, blowing time is 6min, stand still for 40min, remove slag, obtain ...

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Abstract

The invention discloses a high-conductivity medium-strength aluminum alloy single wire. The high-conductivity medium-strength aluminum alloy single wire comprises chemical components including, by weight percent, 0.12 to 0.34% of Si, 0.2 to 0.4% of Fe, 0.05 to 0.2% of Cu, 0.3 to 0.42% of Mg, 0.03 to 0.1% of Bi, 0.06 to 0.25% of Sr, 0.01 to 0.05% of B, not larger than 0.01% of Mn+Ti+Cr+V, and the balance Al. The aluminum alloy single wire is made through process steps of smelting, degassing, casting, rolling and wire drawing, the tensile strength of the aluminum alloy single wire is larger thanor equal to 234 Mpa, the electric conductivity is larger than or equal to 59.2% IACS, the ductility is larger than or equal to 2.9%, and the wire has the excellent mechanical and electrical conductance properties.

Description

technical field [0001] The invention belongs to the technical field of overhead wires, and in particular relates to a high-conductivity, medium-strength aluminum alloy monofilament and a preparation method thereof. Background technique [0002] With the development of society and economy, the power load supply increases rapidly, and the power transmission capacity of many overhead conductors is close to or exceeds the design value. To increase the transmission capacity by manufacturing large-section steel-reinforced aluminum strands in an area, it is necessary to build higher-strength towers to achieve this, which not only increases the area of ​​the line corridor but also increases the construction cost. In order to solve the energy-saving transformation of transmission lines, reduce transmission line losses, and improve line life, it is one of the development trends to use all-aluminum alloy conductors instead of steel-cored aluminum stranded wires to achieve energy-saving...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/00C22C1/03B22D11/00B21B37/56B21B37/74B21C1/00B21C1/12
CPCB21B37/56B21B37/74B21B2265/10B21C1/003B21C1/12B22D11/003C22C1/026C22C1/03C22C21/00C22C21/08
Inventor 全海建王修庞沙淼杨志全王新运邓煜全朝旭
Owner XICHUAN COUNTY POWER BUREAU
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