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Ultrahigh-strength aluminum alloy with high strength and high hardenability and preparation method of ultrahigh-strength aluminum alloy

A high-hardenability, ultra-high-strength technology, applied in the field of non-ferrous metals, can solve the problems of reducing the safety factor of aircraft, low alloy strength, low Mg content, etc., and achieve the effect of optimizing the effective strengthening phase of the alloy

Active Publication Date: 2017-02-15
FOSHAN UNIVERSITY
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Problems solved by technology

However, the strength of AA7085 aluminum alloy is relatively low, which also reduces the safety factor of the aircraft
The reason is: the content of Mg element in the alloy is low, and the main strengthening phase MgZn 2 Fewer quantities are formed, resulting in lower strength of the alloy

Method used

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  • Ultrahigh-strength aluminum alloy with high strength and high hardenability and preparation method of ultrahigh-strength aluminum alloy
  • Ultrahigh-strength aluminum alloy with high strength and high hardenability and preparation method of ultrahigh-strength aluminum alloy
  • Ultrahigh-strength aluminum alloy with high strength and high hardenability and preparation method of ultrahigh-strength aluminum alloy

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Embodiment Construction

[0024] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0025] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:

[0026] Table 1 gives examples of the chemical composition and weight percentage of the novel ultra-high-strength aluminum alloy proposed by the present invention.

[0027] Table 1: Chemical composition and weight percentage of new ultra-high-strength aluminum alloys

[0028] Table 1

[0029]

[0030]

[0031] The steps of the preparation process of the alloy are:

[0032] (1) According to the chemical composition and weight percentage of the alloy, the ingredients are required;

[0033] (2) Melting in a smelting furnace, the melting temperature is 720-780°C;

[0034] (3) Refining ...

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Abstract

The invention discloses ultrahigh-strength aluminum alloy with high strength and high hardenability and a preparation method of the ultrahigh-strength aluminum alloy. The ultrahigh-strength aluminum alloy comprises the components in percentage by weight: 5.8-6.4wt% of Zn, 1.8-2.6wt% of Mg, 1.0-1.2wt% of Cu, 0.06-0.20wt% of Zr, less than or equal to 0.08wt% of Fe, less than or equal to 0.06wt% Si and the balance of Al and unavoidable impurities. Compared with aluminum alloy such as AA7075 and AA7085, the effective strengthening phase of the alloy is remarkably optimized through reasonably controlling the contents of Zn, Mg and Cu, a Zn / Mg value and a Cu / Mg value in the alloy, therefore, the alloy keeps the hardenability of the aluminum alloy AA7085, and meanwhile, the strength of the alloy is obviously higher than the aluminum alloy such as AA7085; and an interdendritic second phase of the alloy is enabled to be sufficiently decomposed through controlling a homogenization heat treatment process, so that the content of elements which can be strengthened in the alloy is increased.

Description

technical field [0001] The invention relates to a high-strength, high-hardenability ultra-high-strength aluminum alloy and a preparation method thereof, belonging to the technical field of nonferrous metals. Background technique [0002] Ultra-high-strength aluminum alloys have the advantages of low density, high strength, and good thermal processing performance, and are widely used in important structural components in the aerospace field. With the development of the aerospace industry, in order to solve many problems caused by welding and riveting of structural parts, improve the overall performance and reliability of the equipment, and further reduce the weight of the equipment, Al-Zn-Mg-Cu The series of aluminum alloy forgings and pre-stretched thick plates put forward urgent requirements, that is, new ultra-high-strength aluminum alloy materials should not only have high strength, but also have good hardenability and good fatigue performance and other comprehensive prop...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/02C22F1/053
CPCC22C1/026C22C21/10C22F1/002C22F1/053
Inventor 聂宝华周铁涛陈东初谢琰军常萌蕾孙海波
Owner FOSHAN UNIVERSITY
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