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High-strength and high-conductivity aluminum alloy and preparation method thereof

A high-conductivity, high-strength technology, applied in the field of aluminum alloy processing, can solve the problems of low electrical conductivity, low electrical conductivity and low strength of aluminum

Inactive Publication Date: 2018-05-08
JIANGYIN EAST CHINA ALUMINUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductivity of aluminum is relatively low, and the strength is not high, and the strength and conductivity of aluminum alloys are mutually restricted. The high strength has low conductivity, and the high conductivity has low strength. Therefore, it is necessary for us to develop high strength and high conductivity. High-efficiency aluminum alloy materials, improve the strength and electrical conductivity of aluminum alloy materials, so that aluminum alloy materials can play a general substitute for copper alloy materials
[0003] Chinese patent: A high-conductivity, high-strength aluminum alloy and its preparation method (authorized announcement number CN104152760B) discloses an aluminum alloy and its preparation method. From the performance measurement results, although the conductivity is improved, the strength is lower. no significant improvement

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  • High-strength and high-conductivity aluminum alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 A high-strength and high-conductivity aluminum alloy is composed of the following components by weight percentage (wt%): Mg: 0.5-0.54, Mn≤0.01, Zn≤0.01, Si: 0.41-0.45, Fe: 0.09- 0.18, Cu≤0.01, mixed rare earth Re: 0.31~0.5, the balance is Al and unavoidable impurities.

[0020] The method for preparing the above-mentioned aluminum alloy comprises the following steps:

[0021] Melting, the melting temperature is 700°C-755°C, add aluminum ingots, silicon ingots, magnesium ingots, iron additives, mixed rare earths and traces of Zn, Cu, Mn into the melting furnace, stir for 15-20 minutes before using argon Refining for 15-20 minutes, after online degassing and then scraping off the surface ash, the aluminum liquid stands still for 15-20 minutes;

[0022] Casting, the casting temperature is 690℃~730℃, the casting speed is 60~95mm / min, the casting water pressure is 0.05~0.15MPa, and then the ingot is homogenized, the treatment temperature is 560±5℃, and the time is...

Embodiment 2

[0024] Example 2 A high-strength and high-conductivity aluminum alloy is composed of the following components by weight percentage (wt%): Mg: 0.52-0.53, Mn≤0.009, Zn≤0.009, Si: 0.43-0.44, Fe: 0.11- 0.13, Cu≤0.009, mixed rare earth Re: 0.34~0.45, the balance is Al and unavoidable impurities.

[0025] The method for preparing the above-mentioned aluminum alloy comprises the following steps:

[0026] Melting, the melting temperature is 700°C-755°C, add aluminum ingots, silicon ingots, magnesium ingots, iron additives, mixed rare earths and traces of Zn, Cu, Mn into the melting furnace, stir for 15-20 minutes before using argon Refining for 15-20 minutes, after online degassing and then scraping off the surface ash, the aluminum liquid stands still for 15-20 minutes;

[0027] Casting, the casting temperature is 695℃~715℃, the casting speed is 60~95mm / min, the casting water pressure is 0.05~0.15MPa, and then the ingot is homogenized, the treatment temperature is 560±5℃, and the ti...

Embodiment 3

[0029] Example 3 A high-strength and high-conductivity aluminum alloy is composed of the following components by weight percentage (wt%): Mg: 0.523, Mn: 0.0018, Zn: 0.0048, Si: 0.436, Fe: 0.116, Cu: 0.0027, Mixed rare earth Re: 0.4, the balance is Al and unavoidable impurities.

[0030] The method for preparing the above-mentioned aluminum alloy comprises the following steps:

[0031] Melting, the melting temperature is 740°C, adding aluminum ingots, silicon ingots, magnesium ingots, iron additives, mixed rare earths and traces of Zn, Cu, Mn into the melting furnace, stirring for 15-20 minutes and then refining with argon for 15-20 minutes After 20 minutes, remove the ash on the surface after online degassing, and let the molten aluminum stand for 15 to 20 minutes;

[0032] Casting, the casting temperature is 705°C, the casting speed is 60-95mm / min, the casting water pressure is 0.05-0.15MPa, and then the ingot is homogenized, the processing temperature is 560±5°C, the time i...

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Abstract

The invention relates to a high-strength and high-conductivity aluminum alloy and a preparation method thereof. The aluminum alloy is prepared from the following components, by weight percentage (wt%), 0.5-0.54wt% of Mg, less than or equal to 0.01wt% of Mn, less than or equal to 0.01wt% of Zn, 0. 41-0.45wt% of Si, 0.09-0.18wt% of Fe, less than or equal to 0.01wt% of Cu, 0.31-0.5wt% of misch metalRE, and the balance Al and inevitable impurities. Compared with the prior art, the aluminum alloy and the preparation method thereof have the following advantages that a proper amount of rare earth element Re is added in the preparation process so that the dendritic crystal spacing can be reduced in the solid-liquid process of the aluminum alloy, the crystal grains can be refined, the content ratio of the Mg to the Si is controlled so that the strength of the aluminum alloy can be improved, and meanwhile, the rare earth element and the harmful impurities form a polycompound so that the adverseeffect of the aluminum alloy can be effectively overcome, and the conductivity of the aluminum alloy can be improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy processing, in particular to an aluminum alloy with high strength and high electrical conductivity and a preparation method thereof. Background technique [0002] Of the metals that exist in nature, silver has the lowest resistivity, followed by copper, then gold and aluminum. In the selection of transmission line materials, the resistivity of gold and aluminum is very close, so the use of gold is not considered, and the use of silver is generally limited to high-end precision equipment. At present, the material of transmission lines widely used in China is copper, but the reserves of copper are limited and the price is not low. Foreign countries have begun to use aluminum alloy wires to replace copper wires on a large scale, and the replacement rate in some countries has even exceeded 50%. However, the conductivity of aluminum is relatively low, and the strength is not high, and the strength and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/02C22F1/047H01B1/02
CPCC22C21/08C22C1/026C22F1/047H01B1/023
Inventor 徐友才
Owner JIANGYIN EAST CHINA ALUMINUM TECH
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