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Low-Li high-plasticity high-strength Mg-Li alloy and preparation method of Mg-Li alloy plate

A magnesium-lithium alloy and high plasticity technology, which is applied in the field of preparation of low-lithium, high-plasticity, and high-strength magnesium-lithium alloys and their sheets, can solve problems that are not conducive to controlling the surface quality and shape of sheets, cannot balance high strength and high plasticity, and are Poor corrosion resistance and other problems, to eliminate casting defects, high yield, and improve corrosion resistance.

Inactive Publication Date: 2017-08-08
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

Invention patent CN201310238075.9 (a rare-earth magnesium-lithium alloy plate and its preparation method) provides a rare-earth magnesium-lithium alloy with high lithium content and rare earth, especially Sc and Y, which greatly increases the material cost; The plate preparation method provided by it is based on hot rolling deformation, which is not conducive to controlling the surface quality and shape of the plate, and due to the high lithium content, the corrosion resistance of the plate is poor
[0005] So far, magnesium-lithium alloy materials have the problems of high strength and high plasticity, and high cost. There is no low-cost, high-plasticity and high-strength magnesium-lithium alloy, especially a magnesium-lithium alloy that can be cold-rolled and deformed.

Method used

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  • Low-Li high-plasticity high-strength Mg-Li alloy and preparation method of Mg-Li alloy plate
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  • Low-Li high-plasticity high-strength Mg-Li alloy and preparation method of Mg-Li alloy plate

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Experimental program
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Embodiment 1

[0030] A low-lithium, high-plasticity, high-strength magnesium-lithium alloy is composed of the following components by mass percentage: Li 6%, Al 3%, Zn 1%, Mn 0.5%, RE 0.3%, Ti+B 0.02%, and the balance is Mg and other impurity elements, and the total content of impurity elements is less than 0.3%.

[0031] The preparation method of the above-mentioned low-lithium high-plastic high-strength magnesium-lithium alloy plate comprises the following steps:

[0032] (1) Dosing according to the mass percentage of each component in the alloy, in which, Mg, Li, Al, Zn are added in the form of pure metal ingots; Mn is added in the form of AlMn10 master alloy; RE is lanthanum-rich mixed rare earth; MgRE20 Add in form; Ti+B is added in the form of AlTi5B1; add the prepared raw materials into the vacuum induction melting furnace, vacuumize, under the protection of argon, adopt the method of gradually increasing the power and heating, and melt at 760-770°C to obtain metal liquid;

[0033]...

Embodiment 2

[0043] A low-lithium, high-plasticity, high-strength magnesium-lithium alloy consisting of the following components by mass percentage: Li 6%, Al 3%, Zn 1%, Mn 0.5%, RE 0.5%, Ti+B 0.0005%, and the balance is Mg and other impurity elements, and the total content of impurity elements is less than 0.3%.

[0044]The preparation method of the above-mentioned low-lithium high-plastic high-strength magnesium-lithium alloy plate comprises the following steps:

[0045] (1) Dosing according to the mass percentage of each component in the alloy, in which, Mg, Li, Al, Zn are added in the form of pure metal ingots; Mn is added in the form of AlMn10 master alloy; RE is lanthanum-rich mixed rare earth; MgRE20 Add in form; Ti+B is added in the form of AlTi5B1; add the prepared raw materials into the vacuum induction melting furnace, vacuumize, under the protection of argon, adopt the method of gradually increasing the power and heating, and melt at 760-770°C to obtain metal liquid;

[0046]...

Embodiment 3

[0052] A low-lithium, high-plasticity, high-strength magnesium-lithium alloy consisting of the following components by mass percentage: Li 4%, Al 2%, Zn 0.5%, Mn 0.2%, RE 0.1%, Ti+B 0.0005%, the balance It is Mg and other impurity elements, and the total content of impurity elements is less than 0.3%.

[0053] The preparation method of the above-mentioned low-lithium high-plastic high-strength magnesium-lithium alloy plate comprises the following steps:

[0054] (1) Dosing according to the mass percentage of each component in the alloy, in which, Mg, Li, Al, Zn are added in the form of pure metal ingots; Mn is added in the form of AlMn10 master alloy; RE is lanthanum-rich mixed rare earth; MgRE20 Add in form; Ti+B is added in the form of AlTi5B1; add the prepared raw materials into the vacuum induction melting furnace, vacuumize, under the protection of argon, adopt the method of gradually increasing the power and heating, and melt at 780-790°C to obtain metal liquid;

[005...

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Abstract

The invention discloses a low-lithium high-plasticity high-strength Mg-Li alloy prepared from the following components in percentage by mass: 4-7% of Li, 2-6% of Al, 0.5-3% of Zn, 0.2-1% of Mn, 0.1-1% of RE, 0-0.05% of Ti+B, less than 0.3% of impurities and the balance of Mg. The invention also discloses a preparation method of an Mg-Li alloy plate. The preparation method comprises the following steps: proportioning, smelting, casting, homogenizing, extruding, rolling and annealing. The Mg-Li alloy related to the invention is relatively low in Li content and relatively high in strength and corrosion resistance; meanwhile, due to the addition of Li, a close-packed hexagonal crystal structure of Mg is changed, the alloy has relatively high plasticity and can be subjected to cold-rolling deformation; and the adopted extrusion rolling process is simple in operation, the finished product rate is relatively high, and the obtained plate has favorable overall performances.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metals, and in particular relates to a low-lithium, high-plasticity, high-strength magnesium-lithium alloy and a preparation method for a plate thereof. Background technique [0002] Magnesium-lithium alloy is the lightest metal structure material, its density is 20-30% lower than ordinary magnesium alloy, it has good thermal conductivity, shock absorption performance and electromagnetic shielding performance, and it is also recyclable. It has great application potential in fields such as aerospace, weaponry, transportation and 3C industries that are sensitive to weight. Among them, the electronic information and instrumentation industry is the fastest growing. Under the requirements of thin wall, miniature, and anti-collision, coupled with the consideration of electromagnetic shielding, heat dissipation, and environmental protection, magnesium-lithium alloy is the best choice for manufacturer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/02C22F1/06C22C1/02
CPCC22C23/00C22C1/02C22C23/02C22F1/06
Inventor 肖阳解海涛纪大伟郭晓光王军武王松森
Owner 郑州轻研合金科技有限公司
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