Aluminum alloy for aircraft wallboard and board preparation method

An aluminum alloy sheet and a technology for aircraft, which are applied in the field of aluminum alloy sheet for aircraft wall panels and its preparation, can solve the problems of difficulty in improving the comprehensive performance of the damage-resistant aluminum alloy sheet, and achieve large-scale industrial production, simple process and low cost. Effect

Active Publication Date: 2021-04-13
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing aluminum alloys and plates for aircraft siding, adjusting the content of main alloying elements and adding new microalloying elements, combined with high temperature heat preservation + deep cooling + cold rolling treatment, to obtain anti-fatigue crack growth An aluminum alloy with high strength, high fracture toughness and excellent mechanical properties solves the problem that the comprehensive performance of the existing damage-resistant aluminum alloy sheet is difficult to improve

Method used

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  • Aluminum alloy for aircraft wallboard and board preparation method

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Effect test

Embodiment 1

[0026] (1) The alloy composition is: Cu: 4.2%, Mg: 1.5%, Mn: 0.5%, Zr: 0.11%, Sc: 0.15%, the balance is Al and trace impurity elements, and the total content of the impurity elements is less than 0.1% %.

[0027] (2) Carry out alloy smelting according to the designed components to obtain ingots, which are homogenized, milled, and hot-rolled to 40 mm in sequence;

[0028] (2) High temperature heat preservation treatment: put the rolled aluminum alloy plate into a heating furnace for heating, the heating temperature is 480°C, and the heat preservation time is 3h;

[0029] (3) Cooling treatment: take the plate that has been treated with high temperature heat preservation out of the furnace and take air cooling;

[0030] (4) Cryogenic treatment: put the plate after high temperature heat preservation and cooling treatment into an environmental box for cryogenic treatment, the cooling temperature is -90°C, and the holding time is 3h;

[0031] (5) Cold-rolling treatment: Immediatel...

Embodiment 2

[0036] (1) The alloy composition is: Cu: 4.4%, Mg: 1.5%, Mn: 0.5%, Zr: 0.11%, Sc: 0.15%, Ag: 0.2%, the balance is Al and trace impurity elements, the impurity elements The total content is less than 0.1%.

[0037] (2) Carry out alloy smelting according to the designed components to obtain ingots, which are homogenized, milled, and hot-rolled to 35mm in sequence;

[0038] (2) High temperature heat preservation treatment: put the rolled aluminum alloy plate into a heating furnace for heating, the heating temperature is 490°C, and the heat preservation time is 2.5h;

[0039] (3) Cooling treatment: take water mist cooling after the high-temperature insulation-treated plates are taken out of the furnace;

[0040] (4) Cryogenic treatment: put the plate after high temperature heat preservation and cooling treatment into the environmental box for cryogenic treatment, the cooling temperature is -180°C, and the holding time is 3h;

[0041] (5) Cold-rolling treatment: Immediately carry...

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Abstract

The invention relates to an aluminum alloy board for an aircraft wallboard and a preparation method, and belongs to the technical field of preparation of aluminum alloy boards. The aluminum alloy board is prepared from the following alloy components in percentage by weight: 3.8-4.6% of Cu, 1.2-1.8% of Mg, 0.30-0.85% of Mn, 0.04-0.20% of Zr, any one or two of 0.05-0.30% of Sc and 0.2-0.7% of Ag and the balance of Al and trace impurity elements, and the total content of the impurity elements is smaller than 0.1%. Aiming at a 2024 aluminum alloy widely selected by aircrafts, the aluminum alloy with high fatigue crack propagation resistance, high fracture toughness and excellent mechanical properties is obtained by adjusting the content of main alloy elements, adding new microalloying elements and combining high-temperature heat preservation, cryogenic treatment and cold rolling treatment; the problem that the damage resistance of an existing aircraft wallboard is difficult to improve is solved; and the aluminum alloy board for the aircraft wallboard prepared through the method is excellent in damage resistance, the process is simple, the cost is low and large-scale industrial production can be achieved easily.

Description

technical field [0001] The invention relates to an aluminum alloy plate for aircraft wall panels and a preparation method thereof, belonging to the technical field of aluminum alloy plate preparation. Background technique [0002] Judging from the design ideas and material selection of various generations of aircraft at home and abroad, the wing material is mainly aluminum alloy. The lower wall plate of the wing is mainly designed according to the fatigue strength. Usually, the 2000 series aluminum alloy plate with medium strength, good fatigue resistance and damage resistance is selected, and its corrosion resistance (exfoliation corrosion and intergranular corrosion) is also taken into account. With the development of the new generation of aircraft durability / damage tolerance design ideas, the requirements for the reliability, service life, safety and maintainability of the main structure of the aircraft body are increasing, and there is an urgent need to adopt high fractu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16B21C37/02C22F1/057
CPCC22C21/16B21C37/02C22F1/057
Inventor 郝敏伊琳娜臧金鑫雷越王亮
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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