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High-plasticity magnesium alloy and preparation method thereof

A magnesium alloy, high plasticity technology, applied in the field of metal materials, can solve the problems of patents and few applications, and achieve the effect of improving strength and toughness, strong portability, and preventing the growth of grains

Active Publication Date: 2017-05-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has been reported that there are few methods, patents and applications for improving the plastic deformation ability of wrought magnesium alloys by compounding Ca and Mn on the basis of Mg-Zn systems.

Method used

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  • High-plasticity magnesium alloy and preparation method thereof
  • High-plasticity magnesium alloy and preparation method thereof
  • High-plasticity magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high plasticity magnesium alloy of this embodiment is composed of the following components in mass percentage: Zn 3.75%, Ca 0.21%, Mn 0.15%, and the balance is Mg and unavoidable impurities.

[0024] The preparation method of the high plasticity magnesium alloy of above-mentioned composition is as follows:

[0025] (1) Alloy smelting and casting: Prepare materials according to the above-mentioned magnesium alloy composition content. The raw materials used are industrial pure magnesium ingots, pure zinc, Mg-30%Ca master alloy, Mg-3%Mn master alloy, and the volume ratio is 1: 99 SF 6 +CO 2 Under the protection of gas, put the magnesium ingot into the crucible and melt it, then add pure zinc, Mg-30%Ca master alloy, Mg-3%Mn master alloy according to the ratio of the alloy composition, and the temperature should be 140~220℃ before adding. Preheat for 15-30 minutes, press it below the liquid surface quickly when adding, stir for 2-5 minutes after melting to make the ing...

Embodiment 2

[0030] The high plasticity magnesium alloy of this example is composed of the following components in mass percentage: Zn3.59%, Ca0.20%, Mn0.25%, the balance is Mg and unavoidable impurities. The preparation method is the same as that of Example 1.

Embodiment 3

[0032] The high plasticity magnesium alloy of this example is composed of the following components in mass percentage: Zn3.68%, Ca0.21%, Mn0.65%, the balance is Mg and unavoidable impurities, and the preparation method is the same as that of Example 1.

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Abstract

The invention discloses a high-plasticity magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 3-4% of Zn, 0.1-0.6% of Ca, 0.05-0.8% of Mn, and the balance of Mg and inevitable impurities. Ca and Mn are added in a magnesium zinc alloy to prominently refine alloy grains; in hot extrusion process, the dynamic recrystallization can be promoted to stop growth of recrystallized grains, so that the strength and the plasticity of the alloy are synchronously improved, the base surface texture of the alloy can be prominently weakened, and the plasticity of the alloy is improved; in addition, through separation of a second phase and dispersion and separation of nanoscale Mn particles, the strength of the alloy can be effectively improved; the magnesium alloy is high in plasticity; and the component-optimized alloy can reach the ductility of 25-29.8%, the yield strength of 160-205 MPa and the tensile strength of 270-289 MPa.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a high-plasticity Mg-Zn-Ca-Mn magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy has many advantages such as low density, high specific strength, high specific stiffness, good casting performance, good shock absorption, high electromagnetic shielding performance, easy cutting and recyclability, and is currently the lightest metal structural material in industrial applications. It has extremely important application value and broad application prospects in the fields of automobile, electronics, electrical appliances, transportation, aerospace and national defense, and military industry. Especially in terms of light weight, it has significant advantages that are difficult to replace, and can significantly reduce weight and save fuel consumption. However, the crystal structure of magnesium is hexagonal close-packed, with few slip systems, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
CPCC22C1/03C22C23/04C22F1/06
Inventor 陈先华陈娇潘复生
Owner CHONGQING UNIV
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