Ultralight aluminum-lithium alloy and preparation method and application thereof

A technology of aluminum-lithium alloy and metal liquid, which is applied in the field of ultra-light aluminum-lithium alloy and its preparation, can solve problems such as oxidation burning loss, achieve the effects of reducing oxidation burning loss, solving layered segregation, and improving strong plasticity

Active Publication Date: 2022-05-13
郑州轻研合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide an ultra-light aluminum-lithium alloy, which solves the problems caused by high Li and Mg content through composite microalloying, vacuum casting, deformation processing, heat treatment and other processes. Oxidation burning and delamination segregation problems, to obtain ultra-light aluminum-lithium alloys with good matching of strong plasticity

Method used

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  • Ultralight aluminum-lithium alloy and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] An ultra-light aluminum-lithium alloy consisting of the following components in mass percentage: Li: 5%, Mg: 4.5%, Mn: 0.6%, Ti: 0.1%, Sb: 0.05%, Be: 0.01%, Sc: 0.2 %, the balance is Al.

[0037] The preparation method of the ultra-light aluminum-lithium alloy, the specific steps are as follows:

[0038] (1) Dosing according to the mass percentage of each component in the alloy; put the prepared raw materials into a vacuum induction melting furnace to preheat to 100°C, and after vacuuming until the vacuum degree reaches 10Pa, pass high-purity argon into the furnace The pressure reaches 300Pa, the temperature is raised to 730°C, and the molten metal is obtained by electromagnetic stirring under an argon atmosphere;

[0039](2) Refining the molten metal obtained in step (1) under an argon atmosphere at 730°C for 15 minutes, keeping mechanical stirring during refining; and then standing at 730°C for 10 minutes, casting the molten metal into a cylindrical water-cooled copp...

Embodiment 2

[0047] An ultra-light aluminum-lithium alloy composed of the following components in mass percentage: Li: 4.5%, Mg: 4%, Mn: 0.6%, Ti: 0.1%, Sb: 0.05%, Be: 0.01%, Sc: 0.2 %, Zr: 0.1%, and the balance is Al.

[0048] The preparation method of the ultra-light aluminum-lithium alloy, the specific steps are as follows:

[0049] (1) Dosing according to the mass percentage of each component in the alloy; put the prepared raw materials into a vacuum induction melting furnace to preheat to 100°C, and after vacuuming until the vacuum degree reaches 10Pa, pass high-purity argon into the furnace The pressure reaches 300Pa, the temperature is raised to 750°C, and the molten metal is obtained by electromagnetic stirring under an argon atmosphere;

[0050] (2) Refining the molten metal obtained in step (1) under an argon atmosphere at 750°C for 15 minutes, keeping mechanical stirring during refining; and then standing at 750°C for 10 minutes, casting the molten metal into a cylindrical wate...

Embodiment 3

[0057] An ultra-light aluminum-lithium alloy composed of the following components in mass percentage: Li: 3.2%, Mg: 4%, Mn: 0.6%, Ti: 0.1%, Sb: 0.05%, Be: 0.01%, Sc: 0.2 %, Zr: 0.1%, and the balance is Al.

[0058] The preparation method of the ultra-light aluminum-lithium alloy, the specific steps are as follows:

[0059] (1) Dosing according to the mass percentage of each component in the alloy; put the prepared raw materials into a vacuum induction melting furnace to preheat to 100°C, and after vacuuming until the vacuum degree reaches 10Pa, pass high-purity argon into the furnace The pressure reaches 300Pa, the temperature is raised to 740°C, and the molten metal is obtained by electromagnetic stirring under an argon atmosphere;

[0060] (2) Refining the molten metal obtained in step (1) under an argon atmosphere at 770°C for 15 minutes, maintaining mechanical stirring during refining; and then standing at 770°C for 10 minutes, casting the molten metal into a cylindrical ...

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Abstract

The invention belongs to the technical field of aluminum-lithium alloys, and particularly relates to an ultra-light aluminum-lithium alloy and a preparation method and application thereof. According to the preparation method, through composite microalloying and the processes of vacuum casting, deformation processing, heat treatment and the like, the problems of oxidation burning loss and layering segregation caused by high Li and Mg contents are solved, and the ultra-light aluminum-lithium alloy with high plasticity and good matching is obtained. The ultra-light aluminum lithium alloy is prepared from the following components in percentage by mass: 3.0 to 8.0 percent of lithium, 3.0 to 9.0 percent of magnesium, 0.01 to 0.03 percent of beryllium, 0.01 to 0.30 percent of antimony, 0.10 to 0.80 percent of manganese, 0.02 to 0.20 percent of titanium, 0.10 to 0.30 percent of scandium, 0.05 to 0.30 percent of zirconium and the balance of aluminum. The obtained ultra-light aluminum-lithium alloy has excellent comprehensive performance, and the performance that the density is 2.18 g / cm < 3 >, the tensile strength is 340 MPa, the yield strength is 308 MPa, and the percentage elongation after fracture is 10.4% can be achieved. The ultra-light aluminum-lithium alloy is good in strength and plasticity, and can be used as an advanced light-weight structural material to replace a conventional aluminum alloy component on an aircraft.

Description

technical field [0001] The invention belongs to the technical field of aluminum-lithium alloy processing, and in particular relates to an ultra-light aluminum-lithium alloy and its preparation method and application. Background technique [0002] Ultra-light aluminum-lithium alloy is a light-weight metal structure material. For every 1% lithium added to the alloy, the density will decrease by 3%. If ultra-light aluminum-lithium alloy is used instead of conventional aluminum alloy, the structural weight can be reduced by 15% to 30%. , the elastic modulus is increased by 9%, and the stiffness is increased by 15% to 20%, which is of great significance to realize the lightweight of aerospace equipment and has broad application prospects. [0003] The main research and development idea of ​​ultra-light aluminum-lithium alloy is to add a higher content of Li (0.53g / cm 3 ) and Mg (1.74g / cm 3 ), but Li and Mg are lighter in the smelting process, easy to oxidize and flammable, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/06C22C1/03C22F1/04C22F1/047
CPCC22C21/00C22C21/06C22C1/026C22C1/03C22F1/04C22F1/047
Inventor 廖荣跃肖阳刘志鹏马凯杰解海涛刘金学刘振杰祁登科
Owner 郑州轻研合金科技有限公司
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