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Aluminum alloy monofilament and preparation method thereof

An aluminum alloy monofilament, aluminum alloy technology, applied in metal processing equipment, metal/alloy conductors, manufacturing tools, etc., to achieve the effect of reducing homogenization time, excellent electrical conductivity, and reducing the size of primary crystal silicon particles

Active Publication Date: 2022-01-21
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the deficiency that the existing wires for overhead transmission lines cannot have both excellent electrical conductivity and heat resistance, thereby providing an aluminum alloy monofilament and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides an aluminum alloy monofilament, its composition and mass percent are: Sr 0.020wt%, B0.020wt%, Sc 0.030wt%, Fe 0.120wt%, Si 0.080wt%, (Cr+Mn+ V+Ti) 0.006wt%, Al remainder.

[0043] The preparation method of aluminum alloy monofilament in the present embodiment comprises the following steps:

[0044] 1) Melting: Melt an aluminum ingot with a purity of 99.7% at 730°C to obtain an aluminum melt; add an Al-B master alloy to the aluminum melt at 730°C, and then let it stand for 30 minutes before removing slag; melt the aluminum The material is heated to raise the temperature of the aluminum melt to 730°C; then the metal Sr and the Al-Sc master alloy are added to the aluminum melt. Among them, the content of B element in Al-B master alloy is 4wt%, the content of Sc element in Al-Sc master alloy is 2wt%; The ratio is 97.87:0.5:0.2:1.5.

[0045] 2) Refining: add liquid refining agent and nitrogen to the aluminum alloy liquid at 720°C, carry out dehydr...

Embodiment 2

[0052] This embodiment provides an aluminum alloy monofilament, its composition and mass percent are: Sr 0.030wt%, B0.020wt%, Sc 0.040wt%, Fe 0.102wt%, Si 0.070wt%, (Cr+Mn+ V+Ti) 0.005wt%, Al balance.

[0053] The preparation method of aluminum alloy monofilament in the present embodiment comprises the following steps:

[0054] 1) Melting: Melt an aluminum ingot with a purity of 99.7% at 750°C to obtain an aluminum melt; add an Al-B master alloy to the aluminum melt at 750°C, and then let it stand for 25 minutes before removing slag; melt the aluminum The material is heated to raise the temperature of the aluminum melt to 750°C; then the metal Sr and the Al-Sc master alloy are added to the aluminum melt. Among them, the content of B element in Al-B master alloy is 4wt%, the content of Sc element in Al-Sc master alloy is 2wt%; The ratio is 97.29:0.5:0.3:2.

[0055] 2) Refining: add liquid refining agent and nitrogen to the aluminum alloy liquid at 740°C, carry out dehydrogen...

Embodiment 3

[0062] This embodiment provides an aluminum alloy monofilament, its composition and mass percent are: Sr 0.030wt%, B0.030wt%, Sc 0.050wt%, Fe 0.105wt%, Si 0.070wt%, (Cr+Mn+ V+Ti) 0.005wt%, Al balance.

[0063] The preparation method of aluminum alloy monofilament in the present embodiment comprises the following steps:

[0064] 1) Melting: Melt an aluminum ingot with a purity of 99.7% at 740°C to obtain an aluminum melt; add an Al-B master alloy to the aluminum melt at 740°C, and then let it stand for 30 minutes before removing slag; melt the aluminum The material is heated to raise the temperature of the aluminum melt to 740°C; then the metal Sr and the Al-Sc master alloy are added to the aluminum melt. Among them, the content of B element in Al-B master alloy is 4wt%, the content of Sc element in Al-Sc master alloy is 2wt%; The ratio is 97.01:0.75:0.3:2.5.

[0065]2) Refining: add liquid refining agent and nitrogen to the aluminum alloy liquid at 730°C, carry out dehydrog...

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Abstract

The invention provides an aluminum alloy monofilament and a preparation method thereof. The aluminum alloy monofilament comprises Al, Sr, B, Sc, Fe, Si, Cr, Mn, V and Ti, wherein the mass percent of Sr is 0.01 wt%-0.05 wt%, the mass percent of B is 0.01 wt%-0.03 wt%, and the mass percent of Sc is 0.01 wt%-0.05 wt%, a proper amount of the Sr element, the B element and the Sc element are added, the conductivity of the aluminum alloy monofilament can be remarkably improved, and the strength and the heat resistance of the aluminum alloy monofilament can be obviously improved; and in addition, the element Sr is also beneficial to reducing the homogenization time of a cast ingot, reducing the size of primary silicon particles and improving the tensile strength, the ductility and other mechanical properties of the aluminum alloy monofilament. In conclusion, the aluminum alloy monofilament has excellent conductivity, excellent heat resistance and an excellent mechanical property.

Description

technical field [0001] The invention relates to the technical field of electric power transmission, in particular to an aluminum alloy monofilament and a preparation method thereof. Background technique [0002] The distribution of energy resources and power load in my country is seriously unbalanced. There is a strong demand for power in the central, eastern and coastal areas, while energy resources are mainly distributed in the western region. my country's economic development stage and the characteristics of energy distribution determine the necessity of long-distance power transmission with high voltage, large capacity and low loss. The wires used in active overhead transmission lines are mainly ordinary steel-cored aluminum stranded wires. The conductivity of the hard aluminum alloy material used at 20 ° C is not less than 61% IACS (International Annealing Copper Standard, International Annealed Copper Standard), but the heat resistance is relatively low. Poor (long-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06C22F1/04B22D43/00H01B1/02
CPCC22C21/00C22C1/026C22C1/03C22C1/06C22F1/04B22D43/004H01B1/023
Inventor 祝志祥胡博陈保安丁一张强朱元成李希元潘学东杨长龙庞震陈新刘树新于宙郑炜亮隋合轼马洪峰段有重徐中凯郑薇丁鹏
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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