A kind of aluminum-lithium alloy material, component and preparation method thereof
A technology of aluminum-lithium alloy and parts, which is applied in the field of aluminum-lithium alloy, can solve the problems of rough surface quality of product parts, limited application range, etc., and achieve the effects of overall weight reduction, easy process realization and high controllability
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Embodiment 1
[0042] 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 smelted in vacuum, and the smelting temperature is 770°C. Subsequently, the preparation of aluminum-lithium alloy powder was carried out under the atomization gas pressure of argon as the medium, and the atomization pressure was 3.0 MPa. Then air classification is performed under nitrogen protection, and the particle size distribution range of the powder after classification is 15-53 microns. The graded powder was pretreated at 320°C / 2.5h in an argon atmosphere. After cooling, it was placed in a selective laser melting device for printing. The printing parameters were: spot diameter 70 microns, powder layer thickness 30 microns, laser power 250w, the scanning distance is 120 microns, and the scanning speed is 1000mm / s. After the printing is completed, it is placed in a heat treatment furnace and kept at a temperature of 180 ° C for 24 hours. The mechanical pro...
Embodiment 2
[0044]According to the mass fraction ratio: Mg: 7%; Mn: 2%; Li: 2%; Sc: 0.5%; Zr: 0.2%; The raw materials are smelted in vacuum, and the smelting temperature is 780°C. Then, the aluminum-lithium alloy powder was prepared under the atomization gas pressure of argon as the medium, and the atomization pressure was 3.5MPa. Then air classification is performed under nitrogen protection, and the particle size distribution range of the powder after classification is 10-45 microns. The graded powder was pretreated at 300°C / 2.0h in an argon atmosphere. After cooling, it was placed in a selective laser melting device for printing. The printing parameters were: spot diameter 70 microns, powder layer thickness 30 microns, laser power 220w, the scanning distance is 100 microns, and the scanning speed is 800 mm / s. After the printing is completed, it is placed in a heat treatment furnace and kept at a temperature of 180 ° C for 24 hours. The mechanical properties of the product are as foll...
Embodiment 3
[0046] 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 smelted in vacuum, and the smelting temperature is 790°C. Subsequently, the preparation of aluminum-lithium alloy powder was carried out under the atomization gas pressure of argon as the medium, and the atomization pressure was 2.8MPa. Then air classification is performed under nitrogen protection, and the particle size distribution range of the powder after classification is 15-53 microns. The graded powder was pretreated at 330°C / 2.0h in an argon atmosphere, cooled and placed in a selective laser melting device for printing. The printing parameters were: spot diameter 65 microns, powder layer thickness 40 microns, laser power 250w, the scanning spacing is 90 microns, and the scanning speed is 1100 mm / s. After the printing is completed, it is placed in a heat treatment furnace and kept at a temperature of 180 ° C for 24 hours. The mechanical properties of th...
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