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Preparation method of intermediate strength aluminum alloy monofilament

A medium-strength aluminum alloy and aluminum alloy monofilament technology, applied in the direction of metal/alloy conductors, cable/conductor manufacturing, power cables, etc., can solve the problems of high cost, complex production process of medium-strength aluminum alloy, product mechanical properties and electrical conductivity Poor problems, to achieve the effect of improving conductivity, increasing work intensity, and simplifying the preparation process

Active Publication Date: 2014-07-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to develop a medium-strength aluminum alloy monofilament material with a conductivity of 59% IACS for overhead wires in the electric power industry and its preparation process, which overcomes the complicated production process of the existing medium-strength aluminum alloy, high cost and poor product quality. Insufficient mechanical properties and poor electrical conductivity

Method used

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  • Preparation method of intermediate strength aluminum alloy monofilament
  • Preparation method of intermediate strength aluminum alloy monofilament
  • Preparation method of intermediate strength aluminum alloy monofilament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition and weight percentage of the aluminum alloy material are:

[0029]

[0030] The specific preparation method is:

[0031] (1) Smelting: select industrial pure aluminum ingots with a purity of 99.7% and add them to the melting furnace at a melting temperature of 730°C; after the pure aluminum is completely melted, add Al-B, Al-Mg and Al-Si master alloys at 740°C to make Their final contents are shown above,

[0032] (2) Refining: use a mixer to fully stir the molten aluminum, use a refining agent for the molten aluminum to degas and remove slag, the refining temperature of the molten aluminum alloy is 740°C, and stand for 40 minutes.

[0033] (3) Casting: put the aluminum liquid obtained in step 2) at 715°C, put the low-carbon steel mold into a box furnace and heat it to 220°C, pour the aluminum liquid into the cylindrical mold, and prepare a Ф80 × 100mm long cylindrical aluminum ingot.

[0034](4) Rod making: the round aluminum ingot is extruded int...

Embodiment 2

[0038] A medium-strength aluminum alloy material with an electrical conductivity of 59%IACS, the components and their weight percentages are:

[0039]

[0040] The specific preparation method is:

[0041] (1) Smelting: select industrial pure aluminum ingots with a purity of 99.7% and add them to the melting furnace at a melting temperature of 750°C; after the pure aluminum is completely melted, add Al-B, Al-Mg and Al-Si master alloys at 750°C to make Their final contents are shown above,

[0042] (2) Refining: use a mixer to fully stir the aluminum liquid, use aluminum liquid refining agent to degas and remove slag, the aluminum alloy liquid refining temperature is 730°C, and stand for 40 minutes.

[0043] (3) Casting: put the aluminum liquid obtained in step 2) at 720°C, put the low-carbon steel mold into a box furnace and heat it to 200°C, pour the aluminum liquid into the cylindrical mold, and prepare a Ф80 × 100mm long cylindrical aluminum ingot.

[0044] (4) Rod mak...

Embodiment 3

[0048] A medium-strength aluminum alloy material with an electrical conductivity of 59%IACS, the components and their weight percentages are:

[0049]

[0050] The specific preparation method is:

[0051] (1) Smelting: select industrial pure aluminum ingots with a purity of 99.7% and add them to the melting furnace at a melting temperature of 720°C; after the pure aluminum is completely melted, add Al-B, Al-Mg and Al-Si master alloys at 730°C to make Their final contents are shown above,

[0052] (2) Refining: use a mixer to fully stir the aluminum liquid, use aluminum liquid refining agent to degas and remove slag, the aluminum alloy liquid refining temperature is 730°C, and stand for 40 minutes.

[0053] (3) Casting: put the aluminum liquid obtained in step 2) at 715°C, put the low-carbon steel mold into a box furnace and heat it to 220°C, pour the aluminum liquid into the cylindrical mold, and prepare a Ф80 × 100mm long cylindrical aluminum ingot.

[0054] (4) Rod mak...

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Abstract

The invention provides a preparation method of an intermediate strength aluminum alloy monofilament with 59% IACS (International Annealed Copper Standard) conductivity and belongs to the technical field of overhead conductors of electric transmission lines in the power industry. The intermediate strength aluminum alloy monofilament provided by the invention solves the technical problem that the existing intermediate strength aluminum alloy is complex in production process, high in cost and poor in mechanical property and conductivity of the product. The intermediate strength aluminum alloy monofilament is developed mainly by adding microalloying elements to control the content of impure elements in the alloy and adjusting the microstructure of the alloy in a thermal treatment process, wherein the conductivity is not less than 59% IACS (20 DEG C), the tensile strength is not less than 240MPa and the ductility is not less than 3.5%.

Description

【Technical field】 [0001] The invention relates to a method for preparing an overhead wire of a power transmission line in the electric power industry, in particular to a method for preparing a medium-strength aluminum alloy wire with a conductivity ≥ 59% IACS. 【Background technique】 [0002] Compared with the conventional aluminum steel conductor (ACSR), the all-aluminum alloy conductor (AAAC) transmission line has smaller line loss, larger draw-to-weight ratio, good sag characteristics, scratch-resistant surface, simple and convenient construction, and good corrosion resistance. Due to the long service life of the line, all aluminum alloy wires have been widely used. According to reports, the application of AAAC in some places has reached more than 50%, and in some places the proportion is as high as 80%. Although research and development of high-strength all-aluminum alloy wires began as early as the 1960s, high-strength all-aluminum alloy wires have been widely used. How...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/08C22C1/03C22F1/043C22F1/047H01B1/02H01B9/00H01B13/00
Inventor 陈保安韩钰祝志祥陈新于吉波李君明杨长龙李爱军杨孝天
Owner STATE GRID CORP OF CHINA
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