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Aluminum-lithium alloy material, component and preparation method of aluminum-lithium alloy material

A technology of aluminum-lithium alloy and powder materials, which is applied in the field of aluminum-lithium alloy, can solve problems such as rough surface quality of products, limited application range, etc., and achieve the effects of overall weight reduction, easy process realization, and high controllability

Active Publication Date: 2022-01-25
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only applicable to the process technology of arc additive materials, and the surface quality of the processed products is rough and cannot be used to process parts with fine dimensions, so the application range is very limited

Method used

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  • Aluminum-lithium alloy material, component and preparation method of aluminum-lithium alloy material

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Embodiment 1

[0043] According to the mass fraction ratio: Mg: 4.5%; Mn: 1.5%; Li: 1.5%; Sc: 0.6%; Zr: 0.3%; The raw materials are vacuum smelted, and the smelting temperature is 770°C. Then, the aluminum-lithium alloy powder was prepared under the atomization gas pressure with argon as the medium, and the atomization pressure was 3.0 MPa. Then air classification is carried out under the protection of nitrogen, and the particle size distribution interval of the powder after classification is 15-53 microns. The classified powder is pretreated at 320°C / 2.5h under an argon atmosphere, and after cooling, it is placed in a selective laser melting device for printing. The printing parameters are: spot diameter 70 microns, powder layer thickness 30 microns, laser power 250w, scanning distance 120 microns, scanning speed 1000mm / s, after printing, place it in a heat treatment furnace and keep it warm for 24 hours at 180°C. The mechanical properties of the product are as follows: tensile strength 5...

Embodiment 2

[0045]According to the mass fraction ratio: Mg: 7%; Mn: 2%; Li: 2%; Sc: 0.5%; Zr: 0.2%; The raw materials are vacuum smelted, and the smelting temperature is 780°C. Then, the aluminum-lithium alloy powder was prepared under the atomization gas pressure with argon as the medium, and the atomization pressure was 3.5 MPa. Then air classification is carried out under the protection of nitrogen, and the particle size distribution interval of the powder after classification is 10-45 microns. The classified powder is pretreated at 300°C / 2.0h under an argon atmosphere, and then placed in a selective laser melting device for printing after cooling. The printing parameters are: spot diameter 70 microns, powder layer thickness 30 microns, laser power 220w, scanning distance 100 microns, scanning speed 800mm / s, after printing, place it in a heat treatment furnace and keep it warm for 24 hours at 180°C. The mechanical properties of the product are as follows: tensile strength 537MPa, ten...

Embodiment 3

[0047] According to the mass fraction ratio: Mg: 3.5%; Mn: 1.0%; Li: 0.5%; Sc: 0.8%; Zr: 0.4%; The raw materials are vacuum smelted, and the smelting temperature is 790°C. Then, the aluminum-lithium alloy powder was prepared under the atomization gas pressure with argon as the medium, and the atomization pressure was 2.8 MPa. Then air classification is carried out under the protection of nitrogen, and the particle size distribution interval of the powder after classification is 15-53 microns. The graded powder is pre-treated at 330°C / 2.0h under an argon atmosphere, and after cooling, it is placed in a selective laser melting device for printing. The printing parameters are: spot diameter 65 microns, powder layer thickness 40 microns, laser power 250w, scanning distance 90 microns, scanning speed 1100mm / s, after printing, place it in a heat treatment furnace and keep it warm for 24 hours at 180°C. The mechanical properties of the product are as follows: tensile strength 555MP...

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Abstract

The invention provides an aluminum-lithium alloy material system suitable for a selective laser melting technology. The aluminum-lithium alloy material system comprises 1.0-7.0% of Mg, 0.3-2.0% of Mn, 0.5-2.0% of Li, 0.2-1.0% of Sc, 0.1-0.5% of Zr, and the balance aluminum-lithium alloy material. By optimizing the powder preparation process, the printing process and the heat treatment process, generation of internal cracks of the aluminum-lithium alloy material is effectively controlled, so that the raw materials and preparation process foundation support is provided for rapid manufacturing of light-weight parts needed in the aerospace field.

Description

technical field [0001] The present application relates to the field of aluminum-lithium alloys, and more specifically relates to an aluminum-lithium alloy powder material and components that can be used for additive manufacturing, and a preparation method for the powder material and components. [0002] technical background [0003] Additive manufacturing technology (also known as "3D printing") is a method of directly manufacturing three-dimensional physical entities in a layer-by-layer manner based on a computer-based three-dimensional CAD model. Additive manufacturing technology can quickly and precisely manufacture parts of any complex shape and structure on one piece of equipment, thus realizing "free manufacturing". These technologies are aimed at high-end manufacturing fields such as aerospace, weapons manufacturing, automobiles, molds, and biomedicine, directly manufacturing three-dimensional complex structures, and solving the problems that are difficult or even impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06B22F1/14B22F9/08B22F10/28B22F10/64B33Y10/00B33Y70/00B33Y80/00
CPCC22C21/06B22F9/082B22F10/28B22F10/64B33Y10/00B33Y70/00B33Y80/00Y02P10/25
Inventor 曹玄扬李杜宰雄飞严雷鸣李晓庚周朝辉
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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