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Aluminum magnesium containing alloy materials

A lithium-magnesium alloy and alloy technology, applied in the field of lithium-magnesium alloy materials, can solve the problems of few β single-phase alloy research reports, no commercial alloy data, poor thermal stability, etc., and achieve good plasticity, low density, high ratio the effect of strength

Inactive Publication Date: 2006-10-25
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current research on Mg-Li alloys is limited to α single-phase alloys or α+β dual-phase alloys, and there are few research reports on β single-phase alloys, and there are no relevant commercial alloys.
The Mg-Li alloy β single-phase alloy has the characteristics of low strength and poor thermal stability, which will lead to the deformation ability of the Mg-Li alloy material. Therefore, it is necessary to effectively control the Li content in the Mg-Li alloy.

Method used

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  • Aluminum magnesium containing alloy materials

Examples

Experimental program
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Effect test

preparation example Construction

[0015] The above-mentioned components are prepared by the following preparation method to prepare the lithium-containing magnesium alloy material, and the steps include:

[0016] (1) take out each alloying element by proportioning scale;

[0017] (2) Smelting the alloy by smelting method;

[0018] (3) pouring into ingots under atmosphere protection environment;

[0019] (4) peeling the ingot;

[0020] (5) Homogenize the peeled ingot at 350°C±10°C / 24h;

[0021] (6) Homogenize the homogenized ingot at 430°C±10°C / 48h;

[0022] (7) Deforming the treated ingot at room temperature or at 250°C±5°C to form a product.

[0023] For the performance test of the lithium-containing magnesium alloy material prepared by the above method, the test is carried out with a metal microscope, MTS material mechanical performance testing machine, and one-ten-thousandth balance equipment, and the tensile strength of the lithium-containing magnesium alloy material is σ b =180~280Mpa, the yield stre...

Embodiment 1

[0025] Embodiment 1: prepare 100 kilograms of lithium-containing magnesium alloy materials according to the following proportions, each element that needs to be weighed out is:

[0026] Lithium (Li) 15 kg, aluminum (Al) 5 kg, zinc (Zn) 1 kg, zirconium (Zr) 0.80 kg, rare earth element rhenium (Re) 1.2 kg and the balance of magnesium (Mg).

[0027] The preparation method includes melting the elements taken out of the above scale at a melting temperature of 680°C, and casting them into ingots in an argon-protected environment, peeling the ingots with a machine tool and acid solution to obtain a clean surface, and peeling the ingots to obtain a clean surface. Homogenize the ingot at 350°C±10°C / 24h, and then homogenize the ingot at 430°C±10°C / 48h. Under the condition of ℃±5℃, it is processed into products by forging or rolling deformation.

[0028] The product was kept at a temperature of 250° C. for 4 hours, and then taken out. It can meet the general performance requirements. ...

Embodiment 2

[0029] Embodiment 2: prepare 100 kilograms of lithium-containing magnesium alloy materials according to the following proportions, each element that needs to be weighed out is:

[0030] Lithium (Li) 10 kg, aluminum (Al) 4.5 kg, zinc (Zn) 1 kg, zirconium (Zr) 0.80 kg, rare earth element rhenium (Re) 1.2 kg and the balance of magnesium (Mg).

[0031] The preparation method includes melting the elements weighed out above at a melting temperature of 720°C, and melting them in SF 6 The ingot is poured into an ingot under the protection environment of a mixed gas, and the ingot is peeled with a machine tool and an acid solution to obtain a clean surface, and the peeled ingot is subjected to a homogenization treatment at 350°C±10°C / 24h. The ingot is homogenized at 430°C±10°C / 48h, and the homogenized ingot is processed into products by forging or rolling at room temperature or at 250°C±5°C.

[0032] The product was kept at a temperature of 250° C. for 4 hours, and then taken out. It...

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Abstract

The invention discloses a lithium-containing magnesium alloy material, which is a single-phase alloy of Mg-Li alloy in the β-phase region. Aluminum (Al), 1.0%-4.0% zinc (Zn), 0.4%-1.5% zirconium (Zr), 1.2%-5.5% rare earth rhenium (Re) and the rest magnesium (Mg). The material tensile strength of the present invention is σ b =180~280Mpa, the yield strength is σ s =130~260Mpa, elongation δ=15~68%, density 1.31~1.60.

Description

technical field [0001] The invention relates to a magnesium alloy material, in particular to a lithium-containing magnesium alloy material with low density, high strength, rigidity and good plasticity. Background technique [0002] Lithium is the lightest metal element, its density is 0.53g / cm 3 , Only one-third of magnesium, adding lithium to magnesium alloy will reduce its density. [0003] In 1910, when Masing of Germany was studying the interaction between Li, Na, K and Mg, he found that Mg and Li had an interesting structural transformation, and considered this structure to be a superstructure. From 1934 to 1936, researchers from Germany, the United States, and the United Kingdom studied the structural transformation of magnesium-lithium alloys, measured the binary phase diagram, and successively confirmed that the hcp-bcc transformation occurred when the Li content increased to 5.7wt%. Since 1942, the Battelle Institute of the United States began to develop magnesium...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/02
Inventor 周铁涛刘培英李焕喜胡成宇
Owner BEIHANG UNIV
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