Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material and preparation method thereof

An al-cu-sc-b, aluminum alloy monofilament technology, applied in the field of electrical conductor materials, can solve the problems of increased line loss, waste of electric energy, poor overall performance, etc., and achieve the effect of improving conductivity and optimizing preparation process parameters

Pending Publication Date: 2021-03-12
YINGKOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing heat-resistant aluminum alloy wire has poor overall performance (the highest electrical conductivity is 61% IACS (20°C), and the long-term heat-resistant temperature is 150°C), which increases the line loss and causes a large waste of electric energy

Method used

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  • Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material and preparation method thereof
  • Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material and preparation method thereof
  • Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material, composition and weight percentage thereof are:

[0034]

[0035] Pure aluminum ingots with a purity of 99.7% are added with Cu, B, and Sc alloying elements to make their final contents as shown above, and the alloying elements are added in the form of master alloys. After smelting, casting, and rolling at 500°C for 2 hours, a round aluminum rod was obtained, and after drawing, a Φ4mm aluminum alloy monofilament was obtained, and held at 190°C for 3 hours. The conductivity of the monofilament is 61.9%IACS (20°C), the tensile strength is 170MPa, the elongation is 2.1%, and the residual strength rate of 230°C for 1h is ≥93%, which meets the requirement of long-term operation temperature of 150°C.

Embodiment 2

[0037] A kind of Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material, composition and weight percentage thereof are:

[0038]

[0039]

[0040]Pure aluminum ingots with a purity of 99.7% are added with Cu, B, and Sc alloying elements to make their final contents as shown above, and the alloying elements are added in the form of master alloys. After smelting, casting, and rolling at 490°C for 3 hours, a round aluminum rod was obtained. After drawing, a Φ3.5mm aluminum alloy monofilament was obtained, and held at 180°C for 4 hours. The conductivity of the monofilament is 61.8%IACS (20°C), the tensile strength is 180MPa, the elongation is 2.0%, and the residual strength rate of 230°C for 1h is ≥94%, which meets the requirement of long-term operation temperature of 150°C.

Embodiment 3

[0042] A kind of Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material, composition and weight percentage thereof are:

[0043]

[0044] Pure aluminum ingots with a purity of 99.7% are added with Cu, B, and Sc alloying elements to make their final contents as shown above, and the alloying elements are added in the form of master alloys. After smelting, casting, rolling at 460°C for 4 hours to obtain a round aluminum rod, and after drawing to obtain a Φ3.2mm aluminum alloy monofilament, hold at 160°C for 7 hours. The conductivity of the monofilament is 61.9%IACS (20°C), the tensile strength is 168MPa, the elongation is 2.2%, and the residual strength rate of 230°C for 1h is ≥92%, which meets the requirement of long-term operation temperature of 150°C.

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Abstract

An Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material comprises aluminum, boron, copper, scandium alloy elements and inevitable impurity elements in raw materials, and the content of eachcomponent is as follows: 0.05-0.1% of Cu, 0.01-0.02% of B, 0.1-0.3% of Sc, less than or equal to 0.06% of Si, less than or equal to 0.15% of Fe and less than or equal to 0.01% of (V + Ti + Cr + Mn). The invention discloses a preparation method of the Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material. The preparation method comprises the following steps: smelting, wherein the smeltingtemperature is 730-750 DEG C; pouring in a furnace: pouring in a smelting furnace with the temperature of 730-750 DEG C, and adding Al-10Cu and Al-2 Sc intermediate alloys; refining: blowing nitrogenor argon at the temperature of 710-730 DEG C; and casting, rolling, conducting multi-pass drawing on aluminum alloy round rods, thereby obtaining a monofilament. The preparation method has the advantages that preparation process parameters are optimized, and the electric conductivity of the heat-resistant aluminum alloy monofilament is remarkably improved to 61.8% IACS on the premise that the mechanical property is guaranteed.

Description

technical field [0001] The invention relates to the field of electrical conductor materials, in particular to an Al-Cu-Sc-B heat-resistant aluminum alloy monofilament material and a preparation method thereof. Background technique [0002] The current situation of overhead transmission line conductors is mainly traditional steel-cored aluminum stranded wires. If the method of increasing the cross-sectional area of ​​the conductors to manufacture large-section steel-cored aluminum stranded wires is used to increase the transmission capacity, it is necessary to build higher-strength towers to achieve this, which not only increases the corridor area. Moreover, increasing the construction cost will not meet the guidelines of "resource-saving, environment-friendly, new technology, new material, and new process" transmission line. In order to solve the capacity increase and transformation of the urban power grid, it is one of the development trends to effectively utilize the origi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06C22F1/04B21C37/04
CPCB21C37/045C22C1/026C22C1/03C22C1/06C22C21/00C22F1/04
Inventor 胡博陈保安李希元朱元成张忠瑞杨长龙祝志祥马洪峰郑薇隋合轼段有重徐中凯张强丁一陈新张静媛李新赵丽丽
Owner YINGKOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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