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High-yield-ratio wrought magnesium alloy and preparation method thereof

A technology of deformed magnesium alloy and high yield-strength ratio, applied in the field of metal materials, can solve the problems of difficult control, uneven processing deformation, temperature control range error, etc., and achieves easy operation and control, low raw material cost, and improved alloy strength. The effect of plasticity

Active Publication Date: 2017-05-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Complex processing deformation is often uneven, which causes greater stress in the structure, and during heat treatment, the temperature control range has large errors and is difficult to control

Method used

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  • High-yield-ratio wrought magnesium alloy and preparation method thereof
  • High-yield-ratio wrought magnesium alloy and preparation method thereof
  • High-yield-ratio wrought magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The high yield strength ratio deformed magnesium alloy of this embodiment is composed of the following components in mass percentage: Zn3.48%, Ca0.88%, Mn0.08%, and the balance is Mg and unavoidable impurities.

[0022] The preparation method of the high yield strength ratio wrought magnesium alloy of above-mentioned composition is as follows:

[0023] (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 min...

Embodiment 2

[0028] The high yield ratio deformed magnesium alloy in this embodiment is composed of the following components in mass percentage: Zn3.5%, Ca0.86%, Mn0.16%, the balance is Mg and unavoidable impurities, and the preparation method is the same as the implementation example 1.

Embodiment 3

[0030] The high yield strength ratio deformed magnesium alloy in this embodiment is composed of the following components in mass percentage: Zn3.39%, Ca0.84%, Mn0.23%, the balance is Mg and unavoidable impurities, and the preparation method is the same as the implementation example 1.

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Abstract

The invention discloses high-yield-ratio wrought magnesium alloy and a preparation method thereof. The high-yield-ratio wrought magnesium alloy comprises, by mass, 3%-4% of Zn, 0.7%-0.95% of Ca, 0.05%-0.33% of Mn, and the balance Mg and inevitable impurities. According to the prepared alloy, a large quantity of Mg-Zn-Ca ternary phases are separated out in the extrusion direction in the extrusion process and evenly distributed in a magnesium matrix, and thus two-phase reinforcement is achieved; a non-recrystallized area in a large proportion has strong texture, and thus the texture reinforcing effect is achieve; a large quantity of nanoscale Mg particles are dispersed and separated out to achieve the dispersion reinforcing effect, growth of recrystallized grains is restrained in the hot extrusion process, and thus the grain refining effect is achieved; and by adding Ca and Mn, the obvious grain refining effect can be achieved, both the strength and toughness of the alloy are improved, the basal texture of the alloy can be weakened through Ca, and thus the plasticity of materials is improved. In this way, the prepared alloy has high strength and a high yield ratio, and high plasticity of the alloy is maintained.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a deformed magnesium alloy with a high yield ratio and a preparation method thereof. Background technique [0002] Magnesium alloy has many advantages such as low density, high specific strength and specific stiffness, good casting performance, good shock absorption, high electromagnetic shielding performance, easy cutting and recyclability, and is currently the lightest metal structure 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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