Novel large-current-carrying heat-resistant aluminum alloy wire and preparation method thereof

An aluminum alloy wire, large current-carrying technology, applied in metal/alloy conductors, cable/conductor manufacturing, conductors, etc., can solve problems such as macro segregation, adverse effects on wire material processing performance, and limited improvement in heat resistance. Achieve good stability and composition uniformity, solve the macro segregation of Zr element, improve the effect of heat resistance and strength

Inactive Publication Date: 2017-03-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the widely used heat-resistant aluminum alloy wires are generally made of Al-Zr alloys. However, due to the low solid solubility of Zr in the aluminum matrix, it is difficult to improve the degree of alloying, except for the limited improvement in heat resistance. , which also limits the improvement of material strength. At the same time, due to the small diffusion rate of Zr elements in aluminum, it is easy to aggregate into larger Zr-containing phases during the smelting process, resulting in macroscopic segregation, which will affect the subsequent processing of wire materials. performance is adversely affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] Further, the specific steps of a novel method for preparing a high-current-carrying heat-resistant aluminum alloy wire are as follows:

[0039] Step 1: 300.0Kg industrial aluminum, 0.28-0.55kgAl 2 (SeO 3 ) 3 Powder, 0.06-0.9kg metal Ru block, 1.2-18kg Al-Zr master alloy, 3-15kg Al-Sc master alloy, 0.06-0.3kg metal Ni powder, 0.75-1.5kg Al-Si master alloy are evenly mixed, then put into the melting furnace Furnace, heating the furnace body to fully melt the material, heating the aluminum alloy melt to 700-750°C, keeping the temperature for 1-1.5 hours, then stopping the heating to obtain the aluminum alloy melt. Subsequently, all aluminum alloy melts are cast into flat ingots. The number of flat ingots is not less than 20, the thickness in the Z direction is 35mm-40mm, the length in the X direction is 500-510mm, and the width in the Y direction is 250-260mm.

[0040] Step 2: Put the flat cast ingot obtained in Step 1 into the heating furnace, perform homogenization a...

Embodiment 1

[0057] Step 1: Alloy batching, alloy melting, and casting into flat ingots:

[0058] 300Kg industrial aluminum, 0.28kgAl 2 (SeO 3 ) 3 Powder, 0.06kg metal Ru block, 1.2kg Al-Zr master alloy, 3kg Al-Sc master alloy, 0.1kg metal Ni powder, 0.75kg Al-Si master alloy are uniformly mixed, put into the hearth of the melting furnace, and the furnace body is heated to fully melt the material , and heat the aluminum alloy melt to 750° C., keep the temperature for 1 hour, then stop the heating to obtain the aluminum alloy melt. Subsequently, all the aluminum alloy melts are cast into no less than 20 flat ingots with a thickness of 35mm-40mm in the Z direction, a length of 500-510mm in the X direction, and a width of 250-260mm in the Y direction.

[0059] Step 2: Homogenize the flat ingot obtained in Step 1 to obtain a homogenized plate:

[0060] Put 15 flat ingots obtained in step 1 into the muffle furnace for heating, set the temperature at 550°C, and set the heating rate at 10°C / m...

Embodiment 2

[0081] Step 1: Alloy batching, alloy melting, and casting into flat ingots:

[0082] 300Kg industrial aluminum, 0.5kgAl 2 (SeO 3 ) 3 Powder, 0.8kg metal Ru block, 15kg Al-Zr master alloy, 10kg Al-Sc master alloy, 0.2kg metal Ni powder, 1.3kg Al-Si master alloy are evenly mixed, put into the hearth of the melting furnace, and the furnace body is heated to fully melt the material. And heat the aluminum alloy melt to 730° C., keep the temperature for 1.5 hours, stop heating, and obtain the aluminum alloy melt. Subsequently, all the aluminum alloy melts were cast into not less than 20 flat ingots with a thickness of 40 mm in the Z direction, a length of 510 mm in the X direction, and a width of 260 mm in the Y direction.

[0083] Step 2: Homogenize the flat ingot obtained in Step 1 to obtain a homogenized plate:

[0084] Put 15 flat ingots obtained in step 1 into a muffle furnace for heating, set the temperature at 500°C, and set the heating rate at 10°C / min. Take out 15 flat...

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Abstract

The invention provides a novel large-current-carrying heat-resistant aluminum alloy wire and a preparation method thereof. The aluminum alloy wire is composed of elements such as Se, Ru, Zr, Sc, Ni and Si, the Vickers hardness of the aluminum alloy wire at the room temperature is no less than 70 HV, the extension strength of the aluminum alloy wire at the room temperature is no lower than 200 Mpa, the elongation is no less than 10%, the electric conductivity at 20 DEG C is no lower than 58% that of IACS, and the continuous use temperature is no lower than 165 DEG C. According to the method, the wire is obtained through processing by steps such as smelting, casting, rolling, friction stirring processing, slicing, overlaying, extruding, drawing and heat treatment, and finally the wire with good physical and chemical properties is obtained. The aluminum alloy wire adopts common industrial grade aluminum ingots as raw materials for production, compared with the prior art, the product properties of higher electric conductivity, higher strength and better heat resistance can be obtained, and the wire has good development prospects.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and is mainly applied to overhead stranded wires, power cables, conductive alloys for automobiles, and even the application fields of high-strength and high-conductivity aluminum alloys required by household appliances. Specifically, it is a novel aluminum alloy high-strength, high-conductivity, heat-resistant wire and a preparation method thereof. Background technique [0002] In recent years, with the continuous and rapid development of my country's economy, the power industry has developed rapidly as a guarantee for the national economy, gradually forming a strategic pattern of "power transmission from west to east, mutual supply between north and south, and national networking". Long-distance, large-capacity transmission lines New construction and renovation are also imperative. As the carrier of the transmission circuit, the overhead transmission wire and its infrastruct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C1/03H01B1/02H01B5/02H01B13/00
CPCC22C1/026C22C1/03C22C21/00C22C21/02H01B1/023H01B5/02H01B13/00
Inventor 吴玉程张真李萍周士昂黄新民闫华李享
Owner HEFEI UNIV OF TECH
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