High-strength high-plasticity high-yield-ratio magnesium-lithium alloy and preparation method and application thereof

A magnesium-lithium alloy, high yield-strength ratio technology, used in instruments, electrical digital data processing, digital data processing components and other directions, can solve the problem of strong plasticity and yield-strength ratio, short process flow, and low absolute strength of magnesium-lithium alloys and other problems to achieve the effect of improving tensile strength and high temperature plasticity

Active Publication Date: 2021-04-02
郑州轻研合金科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the problems of low absolute strength of magnesium-lithium alloys and difficult matching of strong plasticity and yield ratio. By designing the magnesium-lithium alloy components, optimizing the vacuum melting and casting process and adopting a new deformation heat treatment process, high yield ratio, high yield ratio and Good plasticity, stable quality, high purity, high strength, high plasticity and high yield strength ratio magnesium-lithium alloy material, the elements in the magnesium-lithium alloy are easy to obtain, the process flow is short, the cost is controllable, and it has the prospect of industrial practical application

Method used

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  • High-strength high-plasticity high-yield-ratio magnesium-lithium alloy and preparation method and application thereof
  • High-strength high-plasticity high-yield-ratio magnesium-lithium alloy and preparation method and application thereof
  • High-strength high-plasticity high-yield-ratio magnesium-lithium alloy and preparation method and application thereof

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Experimental program
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Embodiment 1

[0034]A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy, composed of the following components in mass percentage: Li 8%, Al 3%, Zn 1.5%, Y 0.5%, Sr 0.1%, AlTiC (grain refiner) 0.1%, the impurity elements Na and K are less than 0.001%, the total amount of Fe, Ni, Si, etc. is less than 0.05%, and the balance is Mg.

[0035] The preparation method of the high-strength, high-plastic and high-yield ratio magnesium-lithium alloy includes two stages of vacuum melting and casting, deformation and heat treatment, and the specific steps are as follows:

[0036] (1) Vacuum smelting and casting: batching is carried out according to the above-mentioned ratio of magnesium-lithium alloy elements. After batching, put it in a vacuum induction furnace to vacuumize and fill it with Ar to 500Pa, then raise the temperature to 750°C until it melts, and refine it with argon for 5 minutes. , keep it warm for 20 minutes and then cool down to 700°C, filter it through foam ceram...

Embodiment 2

[0041] A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy consists of the following components by mass percentage: Li 9%, Al 3.5%, Zn 3%, Y 1%, Ca+Sr 0.2%, AlTiC (fine grain chemical agent) 0.1%, the impurity elements Na and K are less than 0.001%, the total amount of Fe, Ni, Si, etc. is less than 0.05%, and the balance is Mg.

[0042] The preparation method of the high-strength, high-plastic and high-yield ratio magnesium-lithium alloy includes two stages of vacuum melting and casting, deformation and heat treatment, and the specific steps are as follows:

[0043] (1) Vacuum melting and casting: according to the above-mentioned ratio of magnesium-lithium alloy elements, the ingredients are placed in a vacuum induction furnace, filled with Ar to 500Pa after vacuuming, and then heated to 800°C until melting, followed by argon refining for 5 minutes. Keep it warm for 20 minutes, then cool down to 720°C, filter it through foam ceramics, and cast it. After ...

Embodiment 3

[0047] A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy consists of the following components by mass percentage: Li 8.5%, Al 3.5%, Zn 3%, Nd 1.5%, Ca+Sr 0.3%, AlTiC (fine grain chemical agent) 0.1%, the impurity elements Na and K are less than 0.001%, the total amount of Fe, Ni, Si, etc. is less than 0.05%, and the balance is Mg.

[0048] The preparation method of the high-strength, high-plastic and high-yield ratio magnesium-lithium alloy includes two stages of vacuum melting and casting, deformation and heat treatment, and the specific steps are as follows:

[0049] (1) Vacuum melting and casting: according to the above-mentioned ratio of magnesium-lithium alloy elements, the ingredients are placed in a vacuum induction furnace, filled with Ar to 500Pa after vacuuming, and then heated to 800°C until melting, followed by argon refining for 5 minutes. Let it stand for 30 minutes and then cool down to 720°C. After being filtered by foam ceramics, it is...

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Abstract

The invention belongs to the technical field of magnesium-lithium alloy material preparation, and particularly relates to a high-strength high-plasticity high-yield-ratio magnesium-lithium alloy and apreparation method and application thereof. The high-strength high-plasticity high-yield-ratio magnesium-lithium alloy and the preparation method and application thereof are used for solving the problems of low absolute strength, difficult matching of strong plasticity and yield ratio of the magnesium-lithium alloy, the high-strength high-plasticity high-yield-ratio magnesium-lithium alloy material with high yield ratio, good plasticity, stable quality and high purity is obtained by designing the components of the magnesium-lithium alloy, optimizing a vacuum casting process and adopting a novel deformation heat treatment process, and the magnesium-lithium alloy has an industrialized practical application prospect. According to the preparation method of the high-strength, high-plasticity and high-yield-ratio magnesium-lithium alloy, the plastic processing procedure is simple, the maneuverability is high, only medium-high temperature solution treatment and medium-low temperature deformation are needed, intermediate process annealing is not needed, the yield is high, the economical efficiency is high, and the magnesium-lithium alloy product with the tensile strength of 330 MPa, the yield strength of 314 MPa, the elongation of 16% and the yield ratio of up to 95% or above can be obtained through the method.

Description

technical field [0001] The invention belongs to the technical field of magnesium-lithium alloy material preparation, and specifically relates to a high-strength, high-plasticity, high-yield-ratio magnesium-lithium alloy and its preparation method and application. Background technique [0002] Magnesium-lithium alloy is the lightest metal structure material in the world, with a density of only 1.35g / cm 3 ~1.65g / cm 3 , is an ideal weight-reducing material in the fields of aerospace, weaponry, 3C electronics, and automobiles. It can not only achieve lightweight structure, but also reduce vibration and noise, shield electromagnetic interference, and improve the mobility and accuracy of spacecraft and weaponry. , safety and comfort, as well as the portability, aesthetics and texture of 3C electronic products have all been greatly improved. However, the strength of commonly used magnesium-lithium alloys is generally between 120 and 200MPa, the absolute strength is not high, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06G06F1/18
CPCC22C23/00C22C1/02C22F1/06G06F1/181
Inventor 刘金学解海涛刘志鹏肖阳张瑷月高华郭晓光
Owner 郑州轻研合金科技有限公司
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