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Preparation method of aluminum alloy

A technology of aluminum alloy and intermediate alloy, applied in the field of aluminum alloy and its preparation, can solve the problems of high price and difficult industrial aluminum alloy production, and achieve the effects of reduced strength and elongation, and excellent comprehensive performance.

Inactive Publication Date: 2014-05-14
沈阳东铝特材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of Sc, and the addition of Sc generally needs to be >1% to be effective, it is difficult to be practically used in the production of industrial aluminum alloys.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Raw material preparation: use pure metal aluminum, pure metal magnesium, pure metal zinc, pure metal copper, Al-Zr master alloy, Al-Sc master alloy as raw materials, according to Al-Zn-Mg-Cu-Zr-Sc alloy composition % by weight: Zn: 8wt%, Mg: 3.5wt%, Cu: 3.5wt%, Zr: 0.05wt%, Sc: 0.01wt%, the balance is Al, and prepares materials;

[0021] (2) Alloy smelting and casting: smelting in a resistance furnace, adding pure metal aluminum to the resistance furnace for melting, adding pure metal zinc, pure metal copper, Al-Zr master alloy and Al-Sc master alloy after melting, heating up to 720°C, then add preheated pure metal magnesium, after these metals are melted and stirred evenly, the temperature rises to 740°C, and then use the degassing agent hexachloroethane to treat for 5 minutes, after the treatment is completed, the alloy melt is stirred and kept at 750°C Set it aside for 10 minutes, remove the dross on the surface of the alloy melt after standing, and then cast it....

Embodiment 2

[0029] (1) Raw material preparation: use pure metal aluminum, pure metal magnesium, pure metal zinc, pure metal copper, Al-Zr master alloy, Al-Sc master alloy as raw materials, according to Al-Zn-Mg-Cu-Zr-Sc alloy composition The weight percent of: Zn: 10wt%, Mg: 3.5wt%, Cu: 3.5wt%, Zr: 0.25wt%, Sc: 0.10wt%, surplus is Al, carries out material preparation;

[0030] (2) Alloy smelting and casting: smelting in a resistance furnace, adding pure metal aluminum to the resistance furnace for melting, adding pure metal zinc, pure metal copper, Al-Zr master alloy and Al-Sc master alloy after melting, heating up to 740°C, then add preheated pure metal magnesium, after these metals are melted and stirred evenly, the temperature is raised to 760°C, and then treated with degassing agent hexachloroethane for 10min, after the treatment is completed, the alloy melt is stirred and kept at 750°C Set aside for 20 minutes, remove the dross on the surface of the alloy melt after standing, and the...

Embodiment 3

[0038] (1) Raw material preparation: use pure metal aluminum, pure metal magnesium, pure metal zinc, pure metal copper, Al-Zr master alloy, Al-Sc master alloy as raw materials, according to Al-Zn-Mg-Cu-Zr-Sc alloy composition % by weight: Zn: 9wt%, Mg: 3wt%, Cu: 3wt%, Zr: 0.10wt%, Sc: 0.05wt%, the balance is Al, and prepares materials;

[0039] (2) Alloy smelting and casting: smelting in a resistance furnace, adding pure metal aluminum to the resistance furnace for melting, adding pure metal zinc, pure metal copper, Al-Zr master alloy and Al-Sc master alloy after melting, heating up to 730°C, then add preheated pure metal magnesium, after these metals are melted and stirred evenly, heat up to 750°C, then use degassing agent hexachloroethane to treat for 8 minutes, after the treatment, stir the alloy melt and leave it at 750°C Set aside for 15 minutes, remove the dross on the surface of the alloy melt after standing, and then cast, using the semi-continuous vertical casting met...

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Abstract

The invention relates to the technical field of nonferrous metals, and particularly relates to an aluminum alloy and a preparation method of the aluminum alloy. The aluminum alloy comprises the following components in percentage by weight: 8-10% of Zn, 2.5-3.5% of Mg, 2.3-3.5% of Cu, 0.05-0.25% of Zr, 0.01-0.10% of Sc; in the impurity elements, the content of Si being less than or equal to 0.1%, the content of Fe being less than or equal to 0.15%, each one in other elements being less than 0.05%, the total amount being less than 0.5%, and the balance of Al. With the adoption of the technical scheme, the content of Sc in the alloy is controlled reasonably, the content of Zr is enhanced, so the strength and the coefficient of elongation are ensured, and meanwhile the production cost of the alloy is reduced greatly; the tensile strength of the alloy is more than 750MPa, the yield strength is more than 700MPa, the coefficient of elongation is higher than 10%, so the alloy has excellent overall performance and is suitable for the light components requiring high strength.

Description

technical field [0001] The invention relates to the technical field of nonferrous metals, in particular to an aluminum alloy and a preparation method thereof. Background technique [0002] High-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy has the advantages of low density, high strength, and good thermal processing performance, and is an important structural material in the aerospace field. With the development of aerospace, transportation and other industrial technologies, the requirements for structural materials are gradually increasing. Microalloying can effectively inhibit the recrystallization and grain growth of Al-Zn-Mg-Cu aluminum alloy, and maintain the deformation recovery structure. In the early stage, a non-coherent dispersed phase was formed by adding trace amounts of Cr and Mn, and later changed to form a coherent dispersed phase by adding Sc, Zr, Er, etc. At present, Al-Zn-Mg-Cu ultra-high-strength aluminum alloys with a strength of 600 MPa and Al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
Inventor 赵志浩王高松崔建忠
Owner 沈阳东铝特材科技有限公司
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