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

An aluminum alloy and high-strength technology, which is applied in the field of high-strength plastic aluminum alloy and its preparation, can solve problems such as increasing the workload of security personnel and equipment maintenance costs, endangering flight safety, and affecting missions, and achieves abundant raw material reserves, low prices, and low cost. low effect

Active Publication Date: 2020-11-13
YANTAI NANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the extensive use of the aircraft, the ventral fins have been broken many times, the longest crack can reach 100mm, which seriously endangers flight safety and affects the completion of tasks. At the same time, it also greatly increases the workload of support personnel and equipment maintenance costs.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-strength plastic aluminum alloy, including Cu, Mg, Ag, and Mn elements. The mass percentage of each element in the aluminum alloy is: Cu is 5% to 6%, Mg is 0.2% to 1.0%, and Ag is 0.2 to 0.5%, Mn is 0.2-0.4%, and the balance is Al.

[0024] The high-strength plastic aluminum alloy in this embodiment is specifically completed according to the following steps:

[0025] S1. Alloy melting and casting: According to the aluminum alloy, Cu is 5%~6%, Mg is 0.2%~1.0%, Ag is 0.2~0.5%, Mn is 0.2~0.4%, the balance is Al, weigh an appropriate amount of pure Al, pure Mg and Al-20wt% Cu, Al-20wt% Ag and Al-10wt% Mn intermediate alloys; first, pure Al, pure Mg, Al-20wt% Cu, Al-20wt% Ag and Al-10wt% Mn Preheat the master alloy separately at 160℃ for 15-30 minutes; heat pure aluminum in a resistance furnace, keep it at 680-760℃ to melt the master batch, and then add preheated pure Mg, Al-20wt% Cu, Al -20wt%Ag and Al-10wt%Mn master alloy, heat up to 680~760℃ and keep it for 15~30 minu...

Embodiment 2

[0032] In this embodiment, a high-strength plastic aluminum alloy was prepared and tested for performance according to the following steps:

[0033] 1. Casting: According to the mass fraction of Cu in the aluminum alloy is 5%, the mass fraction of Mg is 0.2%, the mass fraction of Ag is 0.2%, the mass fraction of Mn is 0.2%, and the balance is Al. Weigh an appropriate amount of pure Al, pure Mg and Al-20wt% Cu, Al-20wt% Ag and Al-10wt% Mn intermediate alloy; first put the pure Al in the crucible, heat up to 760℃, and keep the pure alloy at 760℃ Al is completely melted, and then pure Mg and Al-Cu master alloy, Al-Ag master alloy, Al-Mn master alloy are added in sequence, and the temperature is 760℃, mechanically stirred for 15min, and then cooled to 700℃ and allowed to stand for 15min to obtain the alloy melt The body is cast into an iron mold at 300°C to obtain an aluminum alloy ingot, which is air-cooled to room temperature.

[0034] 2. Homogenization treatment: Place the aluminum...

Embodiment 3

[0038] In this embodiment, a high-strength plastic aluminum alloy was prepared and tested for performance according to the following steps:

[0039] 1. Casting: According to the aluminum alloy, the mass fraction of Cu is 5.5%, the mass fraction of Mg is 0.6%, the mass fraction of Ag is 0.3%, the mass fraction of Mn is 0.3%, and the balance is Al. Weigh an appropriate amount of pure Al, pure Mg and Al-20wt% Cu, Al-20wt% Ag and Al-10wt% Mn intermediate alloy; first put the pure Al in the crucible, heat up to 760℃, and keep the pure at a temperature of 760℃ Al is completely melted, and then pure Mg and Al-Cu master alloy, Al-Ag master alloy, Al-Mn master alloy are added in sequence, and the temperature is 760℃, mechanically stirred for 15min, and then cooled to 700℃ and allowed to stand for 15min to obtain the alloy melt The body is cast into an iron mold at 300°C to obtain an aluminum alloy ingot, which is air-cooled to room temperature.

[0040] 2. Homogenization treatment: Place t...

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Abstract

The invention relates to the technical field of metal materials and machining of the metal materials, and discloses high-strength and high-plasticity aluminum alloy and a preparation method of the high-strength and high-plasticity aluminum alloy. The aluminum alloy comprises the following components in percentage by mass: 5%-6% of Cu, 0.2%-1.0% of Mg, 0.2%-0.5% of Ag, 0.2%-0.4% of Mn, wherein themass fraction of alloy elements is smaller than or equal to 10%, and the balance is Al. By reasonably controlling the contents of Cu, Mg, Ag and Mn in the aluminum alloy, the aluminum alloy has high strength and high plasticity. The preparation method comprises the following steps: 1, carrying out smelting and casting to obtain an aluminum alloy ingot; 2, carrying out homogenization treatment; and3, carrying out extruding deforming to obtain the high-strength and high-plasticity aluminum alloy. The mechanical properties such as deformation strength and plasticity and toughness of the aluminumalloy are superior to those of traditional commercial wrought aluminum alloy 2D70, the as-cast comprehensive mechanical properties of the aluminum alloy are superior to those of traditional commercial cast aluminum alloy 2024, and the aluminum alloy is suitable for aerospace materials.

Description

technical field [0001] The invention relates to the technical field of metal materials and processing thereof, in particular to a high-strength plastic aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum and aluminum alloys, due to their excellent properties such as low density, high specific strength, abundant reserves and easy recycling, are known as "21st century green and environmentally friendly engineering materials". Development and other aspects have great development prospects. [0003] The pelvic fin is an aerodynamic component installed on the belly of the aircraft, which is equivalent to the vertical tail of the aircraft. Its main function is to increase the directional stability and control stability of the aircraft, especially in high-angle-of-attack flights, which can effectively slow down the aircraft’s swing. Components are indispensable for high maneuverability aircraft. Aircraft pelvic fin structures are generally divi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22C1/03C22F1/057
CPCC22C21/16C22C1/026C22C1/03C22F1/057
Inventor 李民程雪婷房洪杰马旭王兴瑞孙杰汪洪波
Owner YANTAI NANSHAN UNIV
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