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A high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material and preparation method thereof

A composite material and high-elasticity technology, which is applied in the field of high-calcium-aluminum-content high-elastic-modulus magnesium-based composite materials and its preparation, can solve problems such as few design reports, and achieve the effect of simple process flow

Active Publication Date: 2020-11-24
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the alloying elements added to commercial magnesium alloys generally do not exceed 10% (mass percentage), and the strengthening design ideas of magnesium alloy materials also mostly imitate aluminum alloy materials, adopting microalloying and solution-aging heat treatment processes to achieve high density. The precipitated fine second phases, such as Ag, Ca, Zr and other microalloying elements in Mg-Zn alloys, and solid solution-aging heat treatment process to control the size and shape of precipitated phases, however, for a large number of eutectic structures or even There are few reports on the design of magnesium alloy materials with complete eutectic structure

Method used

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  • A high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] A high-elastic-modulus magnesium-based composite material with high calcium and high aluminum content, the components of the magnesium-based composite material in terms of mass percentage are: Ca: 4.5wt.%, Al: 4.5wt.%, Y: 0.5wt% .%, Gd: 0.1wt.%, the rest are Mg and impurities; Y is a magnesium-yttrium master alloy with a Y content of 25wt.%, Gd is a magnesium-gadolinium master alloy with a Gd content of 25wt.%, and other metals are More than 99%.

[0028] A preparation method of a high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material, comprising the following steps:

[0029] (1) Prepare raw materials:

[0030] According to the proportion of the components of a high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material by mass percentage, the required raw materials are weighed;

[0031] (2) Ingot smelting:

[0032] First, in the smelting unit CO 2 +SF 6 Under the protection of protective gas, pure ...

Embodiment 2

[0039] A high elastic modulus magnesium matrix composite material with high calcium and high aluminum content, the components of the magnesium matrix composite material are: Ca: 8.5wt.%, Al: 8.5wt.%, Y: 0.5wt% .%, Er: 2.0wt.%, and the rest are Mg and impurities; Y is a magnesium-yttrium master alloy with a Y content of 25wt.%, Er is a magnesium-erbium master alloy with an Er content of 25wt.%, and the purity of other metals are all 99% or more.

[0040] A preparation method of a high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material, comprising the following steps:

[0041] (1) Prepare raw materials:

[0042] According to the proportion of the components of a high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material by mass percentage, the required raw materials are weighed;

[0043] (2) Ingot smelting:

[0044] First, in the smelting unit CO 2 +SF 6 Under the protection of protective gas, pure magnesium...

Embodiment 3

[0049] A high elastic modulus magnesium-based composite material with high calcium and high aluminum content, the components of the magnesium-based composite material in terms of mass percentage are: Ca: 8.5wt.%, Al: 8.5wt.%, Sr: 3.0wt .%, Gd: 0.5wt.%, the rest are Mg and impurities; Gd is a magnesium-gadolinium master alloy with a Gd content of 25wt.%, and the purity of other metals is above 99%.

[0050] A preparation method of a high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material, comprising the following steps:

[0051] (1) Prepare raw materials:

[0052] According to the proportion of the components of a high-calcium-high-aluminum-content high-elastic-modulus magnesium-based composite material by mass percentage, the required raw materials are weighed;

[0053] (2) Ingot smelting:

[0054] First, in the smelting unit CO 2 +SF 6 Under the protection of protective gas, pure magnesium was added, heated to 760 ° C and stirred well un...

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Abstract

A high elastic modulus magnesium-based composite material with high calcium and high aluminum content. The components of the magnesium-based composite material are calculated in mass percentage: Ca: 4.00~25.00%; Al: 4.00~25.00%; Sr: 0.00~ 3.00%; Nd: 0.00~8.00%; Y: 0.00~8.00%; Gd: 0.00~8.00%; Er: 0.00~8.00%, the rest is Mg and impurities. The preparation method includes the following steps: (1) preparing materials; (2) ingot melting. The beneficial effects of the present invention are: 1. Compared with conventional magnesium-aluminum-calcium magnesium alloys, the present invention not only focuses on strength, but also pays more attention to the elastic modulus of the material. The eutectic structure phase composition is α-Mg and has high modulus. Amount of Mg 2 Ca, Al 2 Ca, (Mg,Al) 2 Ca phase has a high content of eutectic structure, and can effectively control the content of each phase to further control the overall modulus of the material. 2. The present invention adopts ordinary casting and has a simple process flow. It regulates the eutectic structure morphology by regulating the components, and prepares magnesium-based composite materials with both high elastic modulus and high strength.

Description

technical field [0001] The invention belongs to the field of magnesium alloys and magnesium matrix composite materials, in particular to a high elastic modulus magnesium matrix composite material with high calcium and high aluminum content and a preparation method. Background technique [0002] In recent years, the energy crisis, resource depletion and environmental deterioration have put forward higher requirements for the aerospace and automotive industries to reduce weight, save energy and reduce carbon emissions. Magnesium alloys have received increasing attention due to their excellent properties such as low density, high specific strength and high specific stiffness, and have become an important research direction of metal structural materials in recent years. Most of the previous research work focused on the strength and toughness of magnesium alloys: solid solution strengthening and precipitation strengthening were achieved by adding alloy elements such as aluminum a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/02C22C23/06C22C30/00C22C1/03
Inventor 潘虎成秦高梧李景仁任玉平杨延涛李松左良
Owner NORTHEASTERN UNIV LIAONING
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