Novel ultralight high-strength and high-plasticity magnesium lithium alloy and preparation method thereof

A magnesium-lithium alloy and ultra-light technology, which is applied in the field of new ultra-light, high-strength and high-plastic magnesium-lithium alloy and its preparation, can solve the problem that magnesium alloy cannot have high-strength, high-plasticity and room temperature molding at the same time, and achieves the advantage of reducing subsequent processing costs. Effect

Inactive Publication Date: 2017-06-09
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a novel ultra-light, high-strength, high-plastic magnesium-lithium alloy and its preparation method, to solve the problems that magnesium alloys cannot have high strength and high plasticity and can be formed at room temperature at the same time.

Method used

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  • Novel ultralight high-strength and high-plasticity magnesium lithium alloy and preparation method thereof
  • Novel ultralight high-strength and high-plasticity magnesium lithium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Ⅰ), alloy composition

[0023] Configure 10 kilograms of lithium-containing magnesium alloy materials according to the following proportions, and the weights of the alloy elements taken out are respectively: 1.2 kilograms of lithium (Li), 0.2 kilograms of zinc (Zn), 0.4 kilograms of yttrium (Y) and the rest of magnesium (Mg). In terms of weight percentage, the alloy composition is Mg-12%Li-2%Zn-4%Y.

[0024] Ⅱ), alloy smelting

[0025] Alloy smelting is divided into two steps:

[0026] 1) In a crucible with a capacity of 10 kg and a resistance furnace, fully stir, alloy elements Y and Zn are melted, and a Mg-2%-4%Y alloy is prepared.

[0027] 2) Put Mg-2%-4%Y alloy and pure lithium in a vacuum furnace for remelting. When the alloy is completely melted, it is kept at 720°C for 30 minutes and poured in a vacuum furnace.

[0028] Ⅲ), homogenization and deformation processing

[0029] 1) Peel the ingot.

[0030] 2) Wrap the peeled ingot tightly with aluminum foil, an...

Embodiment 2

[0037] Ⅰ), alloy composition

[0038] According to the following proportions, 10 kilograms of lithium-containing magnesium alloy materials are weighed to take out elements: 1.4 kilograms of lithium (Li), 0.3 kilograms of zinc (Zn), 0.6 kilograms of yttrium (Y) and the rest of magnesium (Mg). In terms of weight percentage, the alloy composition is Mg-14%Li-3%Zn-6%Y.

[0039] Ⅱ), alloy smelting

[0040] The smelting of reference example 1. The difference is that the zinc (Zn) and yttrium (Y) contents of the two are different.

[0041] Ⅲ), homogenization and deformation processing

[0042] Refer to the homogenization and rolling procedure of Example 1.

[0043] Ⅳ), microstructure characterization

[0044] Refer to the microstructure characterization of Example 1. The main phases in the alloy are β-Li and Mg 12 ZnY (LPSO phase), the corresponding X-ray spectrum is shown in the attached figure 1 ; Compared with the alloy in Example 1, the amount of the LPSO phase in this al...

Embodiment 3

[0048] Ⅰ), alloy composition

[0049] According to the following proportions, 10 kilograms of lithium-containing magnesium alloy materials are weighed to take out elements: 1.8 kilograms of lithium (Li), 0.3 kilograms of zinc (Zn), 0.6 kilograms of yttrium (Y) and the rest of magnesium (Mg). In terms of weight percentage, the alloy composition is Mg-18%Li-3%Zn-6%Y.

[0050] Ⅱ), alloy smelting

[0051] The smelting of reference example 1. The difference is that the zinc (Zn) and yttrium (Y) contents of the two are different.

[0052] Ⅲ), homogenization and deformation processing

[0053] Refer to the homogenization and rolling procedure of Example 1.

[0054] Ⅳ), microstructure characterization

[0055] Refer to the microstructure characterization of Example 1. The main phases in the alloy are β-Li and Mg 12 ZnY (LPSO phase), the corresponding X-ray spectrum is shown in the attached figure 1 Compared with the alloy in Example 2, the amount of the LPSO phase in the alloy...

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Abstract

The invention relates to the field of high-strength and high-plasticity magnesium lithium alloys, in particular to a novel ultralight high-strength and high-plasticity magnesium lithium alloy and a preparation method thereof, and solves the problem that a magnesium alloy is difficult to synchronously achieve high strength and high plasticity. Alloy elements are reasonably selected; and a long-period structure phase is introduced in a high-Li-content magnesium lithium alloy basal body to prepare a Mg-Li alloy with ultralow density, high strength and high plasticity. The magnesium lithium alloy material is a single-phase alloy in a Mg-Li alloy beta-Li phase area, and comprises the following component elements: 11.5-30% of lithium (Li), 2-6% of zinc (Zn), 3-10% of yttrium (Y) and the balance of magnesium (Mg). The alloy is higher in room-temperature forming capacity, can be cold rolled as a thin plate (0.3-5 mm), and is simple and convenient to operate a machining process. The alloy material reaches the tensile strength of ob=180-320 MPa, the yield strength of o 0.2=130-250 MPa, the ductility of delta more than 40% and the density of 1.1-1.6 g/cm3.

Description

technical field [0001] The invention relates to the field of high-strength and high-plasticity magnesium-lithium alloys, in particular to a novel ultra-light, high-strength and high-plasticity magnesium-lithium alloy which simultaneously has ultra-low density, high strength, high plasticity and can be plastically formed at room temperature and a preparation method thereof. Background technique [0002] Magnesium and lithium (density 0.534g / cm 3 ) after alloying, the resulting magnesium-lithium alloy will have the advantages of low density, high specific strength and high specific stiffness, which can effectively overcome the disadvantages of poor plasticity caused by the close-packed hexagonal structure of magnesium alloys, so that the magnesium-lithium alloys can be used as high-tech materials such as aerospace and automobiles. A potential candidate novel lightweight metal material in the technical field. For Mg-Li alloy, when the Li content is lower than 5.5%, its structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C23/00C22C1/03C22F1/06
Inventor 许道奎韩恩厚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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