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A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy and its preparation method and application

A magnesium-lithium alloy, high yield ratio technology, applied in the field of magnesium-lithium alloy material preparation, can solve the problems of strong plasticity and yield strength ratio, short process flow, low absolute strength of magnesium-lithium alloy, etc., to improve the tensile strength and the effect of high temperature plasticity

Active Publication Date: 2022-02-18
郑州轻研合金科技有限公司
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  • Summary
  • 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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  • A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy and its preparation method and application
  • A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy and its preparation method and application
  • A high-strength, high-plasticity, high-yield ratio magnesium-lithium alloy and its preparation method and application

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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 specifically relates to a high-strength, high-plasticity, high-yield-ratio magnesium-lithium alloy and its preparation method and application. 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 The magnesium-lithium alloy material with good plasticity, stable quality and high purity has the prospect of industrial practical application. The preparation method of the high-strength, high-plasticity, high-yield-ratio magnesium-lithium alloy of the present invention has simple plastic processing procedures and strong maneuverability, only needs medium-high temperature solution treatment, medium-low temperature deformation, no intermediate process annealing, and high yield , economical, through this method can be obtained tensile strength of 330MPa, yield strength of 314MPa, elongation of 16%, yield ratio of up to 95% of magnesium-lithium alloy products.

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 Patents(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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