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Ultrahigh-modulus magnesium alloy and preparation method thereof

A magnesium alloy and modulus technology, which is applied in the field of alumina reinforced magnesium alloy and its preparation, can solve the problems of low modulus, poor plasticity, and low strength, and achieve the effects of increasing the volume fraction, improving the plasticity of the alloy, and enhancing the effect

Active Publication Date: 2016-06-01
西安翱翔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an engineering material, people usually expect high modulus and high strength materials, however, due to the atomic structure characteristics of magnesium alloy, its plasticity is poor, the modulus is low, and the strength is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium and high-purity zinc, and nano-alumina with an average particle size of 78 nanometers;

[0029] (2) Smelting alloy: mix high-purity magnesium and zinc according to the atomic ratio of 4:1, in CO 2 Smelted in a mixed gas with SF6, where CO 2 The volume ratio to SF6 is 80:1; during the smelting process, add nano-alumina accounting for 5% of the alloy mass fraction, keep the temperature at 700°C, and disperse by ultrasonic method;

[0030] (3) Slowly cool the alloy ingot at a cooling rate of 0.4k per second; maintain a vacuum state during the cooling process with a vacuum degree of 5torr;

[0031] (4) After cooling, the alloy ingot is processed into a disc shape;

[0032] (5) Put the coarse-grained alloy disc processed in step (4) into the space formed by the grooves in the upper and lower anvils, apply a high pressure of 5GPa to the alloy, and rotate the anvil at a speed of 2 revolutions per minute...

Embodiment 2

[0034] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium and high-purity zinc, and nano-alumina with an average particle size of 85 nanometers;

[0035] (2) Smelting alloy: mix high-purity magnesium and zinc according to the atomic ratio of 3:1, in CO 2 Smelted in a mixed gas with SF6, where CO 2 The volume ratio to SF6 is 50:1; during the smelting process, add nano-alumina accounting for 3% of the alloy mass fraction, keep the temperature at 700°C, and disperse by ultrasonic method;

[0036] (3) Slowly cool the alloy ingot at a cooling rate of 0.2k per second; keep a vacuum state during the cooling process, and the vacuum degree is lower than 4torr;

[0037] (4) After cooling, the alloy ingot is processed into a disc shape;

[0038] (5) Put the coarse-grained alloy disc processed in step (4) into the space formed by the grooves in the upper and lower anvils, apply a high pressure of 1.5GPa to the alloy, and rotate the press at a speed of 3 revolutions p...

Embodiment 3

[0040] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium and high-purity zinc, and nano-alumina with an average particle size of 68 nanometers;

[0041] (2) Smelting alloy: mix high-purity magnesium and zinc according to the atomic ratio of 3.5:1, in CO 2 Smelted in a mixed gas with SF6, where CO 2 The volume ratio to SF6 is 50:1; during the smelting process, add nano-alumina accounting for 1.8% of the alloy mass fraction, keep the temperature at 700°C, and disperse by ultrasonic method;

[0042] (3) Slowly cool the alloy ingot at a cooling rate of 0.5k per second; maintain a vacuum state during the cooling process with a vacuum degree of 3torr;

[0043] (4) After cooling, the alloy ingot is processed into a disc shape;

[0044] (5) Put the coarse-grained alloy disc processed in step (4) into the space formed by the grooves in the upper and lower anvils, apply a high pressure of 1.5GPa to the alloy, and rotate the press at a speed of 2 revolutions per ...

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Abstract

The invention discloses a ultrahigh-modulus magnesium alloy and a preparation method thereof. Nanometer aluminum oxide is dopted in a magnesium alloy to obtain a ultrahigh-modulus magnesium alloy. The magnesium alloy consists of magnesium and zinc elements and nanometer aluminum oxide; the atom ratio of magnesium and zinc is 3: 1-1.5: 1; the average diameter of the aluminum oxide is below 100 nanometers; the average grain of the magnesium alloy is below 100 nanometers; and the elastic modulus of the alloy can reach above 50 MN*M / Kg. The magnesium alloy is prepared through such steps as smelting, doping of nanometer particles, dispersion, cooling and warping deformation.

Description

technical field [0001] The invention relates to an ultra-high modulus magnesium alloy and a preparation method thereof, in particular to an alumina-reinforced magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is a light metal material with very low density, which has been used in handheld electronic devices, automobiles, aerospace and other fields. As an engineering material, people usually expect high modulus and high strength materials. However, due to the atomic structure characteristics of magnesium alloys, they have poor plasticity, low modulus and low strength. [0003] Chinese patent CN103031452A discloses a silicon carbide particle-reinforced magnesium-based composite material and its preparation method. The invention uses pure Mg powder, Al powder and SiC particle micropowder as raw materials, and adopts powder metallurgy and multi-directional forging to prepare silicon carbide particle-reinforced magnesium-based composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C18/00C22C32/00C22C1/10C22F1/06C22F1/16
CPCC22C1/1036C22C18/00C22C23/04C22C32/0036C22C32/0042C22F1/06C22F1/165C22C1/1047
Inventor 何枇林李德辉朱浩
Owner 西安翱翔新材料科技有限公司
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