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A method for forming an artificially aged aluminum-lithium alloy sheet

An aluminum-lithium alloy and artificial aging technology, which is applied in the field of forming artificially aged aluminum-lithium alloy sheets, can solve the problems of high energy consumption, low material performance, and low efficiency, and achieve improved material forming performance, roughness, and process simple effect

Inactive Publication Date: 2019-06-28
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for forming an artificially aged aluminum-lithium alloy sheet, which overcomes the disadvantages of low efficiency, high energy consumption, and low material performance in the existing aluminum alloy preparation process. This process has the advantages of low manufacturing cost , better machinability and maintain material properties, etc.

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  • A method for forming an artificially aged aluminum-lithium alloy sheet

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Experimental program
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Embodiment 1

[0029] (1) Prepare the cleaning solution to clean the mold surface according to the steps of cleaning and removing black film. The cleaning solution composition is to include by weight %: 45g of hydrochloric acid, 0.2g of EDTA, 65g of corrosion inhibitor, and 1000g of water. Then use mold cleaning glue to clean the mold surface so that the surface roughness of the mold is Ra0.6.

[0030] (2) Use a clean cotton cloth dipped in ethanol to wipe the surface of the 2A97-T8 aluminum-lithium alloy slab (thickness 1.5mm) clean, visually inspect the oil-free cotton cloth, use fine sand felt to dip in deionized water and corundum with a particle size of 20 μm Sand manually polish the surface of the aluminum-lithium alloy slab (thickness 1.5mm), use deionized water to clean the surface of the part to be painted for 5 minutes, and dry the surface of the aluminum-lithium alloy slab (thickness 1.5mm) with oil-free and water-free compressed air .

[0031] (3) Place the flexible heat insulat...

Embodiment 2

[0037] (1) Prepare the cleaning solution to clean the mold surface according to the steps of cleaning and removing black film. The cleaning solution composition is to include by weight %: 45g of hydrochloric acid, 0.2g of EDTA, 65g of corrosion inhibitor, and 1000g of water. Then use mold cleaning glue to clean the mold surface so that the surface roughness of the mold is Ra0.6.

[0038] (2) Use a clean cotton cloth dipped in ethanol to wipe the surface of the 2A97-T8 aluminum-lithium alloy slab (thickness 1.5mm) clean, visually inspect the oil-free cotton cloth, use fine sand felt to dip in deionized water and corundum with a particle size of 20 μm Sand manually polish the surface of 2A97-T8 aluminum-lithium alloy slab (thickness 1.5mm), use deionized water to clean the surface of the part to be brushed for 10 minutes, and use oil-free and water-free compressed air to dry the aluminum-lithium alloy slab (thickness 1.5mm) Blow dry the surface.

[0039] (3) Place the flexible ...

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Abstract

The invention provides a forming method of an aluminum lithium alloy sheet in an artificial aging state. A mold is cleaned with cleanser and mold cleaning glue, the surface roughness of the mold is improved, and scratches to the surface of a part in the forming process are reduced. The sheet is preheated in an induction rapid heating manner, and the material forming performance is effectively improved. In addition, due to the short heating time, precipitated phase redissolution or recrystallization cannot happen to materials, and the material performance cannot change in the heating process. The mold is cooled, part heat can be taken away rapidly in the forming process, and therefore the material performance cannot change in the forming process. The aluminum lithium alloy sheet in the artificial aging state is formed, the process is simple, cost is low, and large-scale industrial production is achieved easily.

Description

technical field [0001] The invention relates to a forming method of a gold thin plate, in particular to a forming method of an artificially aged aluminum-lithium alloy thin plate. Background technique [0002] Aluminum-lithium alloys are widely used as sheet metal parts and the main structure of aircraft due to their comprehensive properties such as high fracture toughness, good fatigue resistance and good corrosion resistance. Due to the artificially aged aluminum-lithium alloy sheet, the formability at room temperature is only one-third of that of the annealed sheet, and the elongation is only about 10%, which is much lower than the 20% elongation of the annealed sheet, so the springback of the part after forming is serious. , Some parts crack during the manufacturing process. Therefore, at present, annealed plates are mostly used for forming, and after forming, quenching, shape correction, and artificial aging are carried out. Although parts can be manufactured through s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04C23G1/12C23G1/04
Inventor 李国爱吴秀亮汝继刚陈高红伊琳娜
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS