Er-containing high-strength magnesium lithium alloy and preparation method thereof

A magnesium-lithium alloy, high-strength technology, applied in the field of magnesium-lithium alloy and its preparation, high-strength magnesium-lithium alloy and its preparation field, can solve the problems of low strength of magnesium-lithium alloy, to improve the strength and thermal stability, not easy to natural Effects of overaging and high aging softening resistance

Inactive Publication Date: 2018-07-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of low strength of magnesium-lithium alloys, the invention pro

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment relates to a high-strength magnesium-lithium alloy containing Er. The alloy contains the following components in mass percentage: Li 5%, Zn 1%, Er 1%, and the balance is Mg and unavoidable impurities.

[0025] This embodiment relates to a method for preparing a high-strength magnesium-lithium alloy containing Er, and the process includes three stages of smelting, plastic deformation and heat treatment. Melting: Melt the components of the alloy according to their ratio and heat up to 730°C, mechanically stir for 2 minutes, keep standing for 4 minutes, and then cast.

[0026] Plastic deformation process: the magnesium-lithium alloy ingot obtained by the smelting process is homogenized at 400° C. for 1 hour, and then the homogenized magnesium-lithium alloy is rolled and deformed at 250° C.

[0027] Heat treatment process: the magnesium-lithium alloy obtained by the plastic deformation process is subjected to aging treatment at 200° C. for 1 hour.

[0028] ...

Embodiment 2

[0031] This embodiment relates to a high-strength magnesium-lithium alloy containing Er. The alloy contains the following components in mass percentage: Li 10%, Zn 6%, Er 5%, and the balance is Mg and unavoidable impurities.

[0032] This embodiment relates to a method for preparing a high-strength magnesium-lithium alloy containing Er, and the process includes three stages of smelting, plastic deformation and heat treatment. Melting: Melt the components of the alloy in proportion and heat up to 670°C, mechanically stir for 8 minutes, keep standing for 12 minutes, and then cast.

[0033] Plastic deformation process: the magnesium-lithium alloy ingot obtained by the smelting process was homogenized at 250° C. for 8 hours, and then the homogenized magnesium-lithium alloy was forged and deformed at 100° C.

[0034] Heat treatment process: the magnesium-lithium alloy obtained by the plastic deformation process is subjected to aging treatment at 50° C. for 30 hours.

[0035] The r...

Embodiment 3

[0038] This embodiment relates to a high-strength magnesium-lithium alloy containing Er. The alloy contains the following components in mass percentage: Li 8%, Zn 4%, Er 1%, and the balance is Mg and unavoidable impurities.

[0039] This embodiment relates to a method for preparing a high-strength magnesium-lithium alloy containing Er, and the process includes three stages of smelting, plastic deformation and heat treatment. Melting: Melt the components of the alloy according to their ratio and heat up to 700°C, mechanically stir for 5 minutes, keep standing for 8 minutes, and then cast.

[0040] Plastic deformation process: the magnesium-lithium alloy ingot obtained by the smelting process was homogenized at 280° C. for 4 hours, and then the homogenized magnesium-lithium alloy was subjected to extrusion deformation at 175° C.

[0041] Heat treatment process: the magnesium-lithium alloy obtained by the plastic deformation process is subjected to aging treatment at 100° C. for ...

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Abstract

The invention discloses an Er-containing high-strength magnesium lithium alloy and a preparation method of the Er-containing high-strength magnesium lithium alloy. The magnesium lithium alloy comprises the following various components by mass percent: 5-10% of Li, 1-6% of Zn, 1-5% of Er, and the balance of Mg and inevitable impurity. The preparation method of the magnesium lithium alloy comprisesthree processes of smelting, plastic deformation and thermal treatment, wherein the smelting process comprises the steps of smelting the materials, stirring, standing, thermally insulating and castingthe process of plastic deformation comprises homogenizing treatment and plastic deformation processing, and the process of thermal treatment comprises aging treatment. The elements of Zn and Er are added into the magnesium lithium alloy, Mg3Zn6 is introduced as a strengthening phase into a solidification structure of the magnesium lithium alloy, so that the strength and the thermal stability of the magnesium lithium alloy are obviously improved, and the low-density high-strength magnesium lithium alloy is obtained after the subsequent plastic deformation and thermal treatment.

Description

technical field [0001] The invention relates to a magnesium-lithium alloy in the field of metal structural materials and a preparation method thereof, in particular to an Er-containing high-strength magnesium-lithium alloy and a preparation method thereof. Background technique [0002] Magnesium-lithium alloys, as the lowest-density metallic structural materials, have received increasing attention in recent years. Magnesium-lithium alloys have the advantages of low density, high specific strength and specific stiffness, and good electromagnetic shielding ability. But the disadvantages of magnesium-lithium alloys are also obvious. Poor corrosion resistance, high economic cost, and low absolute strength limit the application of magnesium-lithium alloys. [0003] For the improvement of the strength of magnesium-lithium alloys, the common methods are microalloying, heat treatment and plastic deformation of the alloy. It has been reported that adding Al, Zn, Ag, Si and other e...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/04C22F1/06
CPCC22C23/00C22C23/04C22F1/06
Inventor 刘文才冀浩吴国华高占奎彭翔魏广玲丁文江
Owner SHANGHAI JIAO TONG UNIV
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