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A kind of high-strength magnesium alloy and preparation method thereof

A technology of magnesium alloy and manufacturing method, which is applied in the field of nano-additive reinforced magnesium alloy and its preparation, can solve problems such as strength gap, achieve the effect of increasing strength, strengthening effect, and improving plasticity of alloy

Inactive Publication Date: 2017-11-17
江苏捷晖电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above inventions are all dedicated to improving the performance of magnesium alloys, especially the strength performance, but the yield strength of the magnesium alloys they invented are all below 400MPa, and their strength is comparable to that of the current long-term There is still a large gap in the engineering materials used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium and high-purity aluminum, and nano-SiO with an average particle size of 80 nanometers 2 ;

[0030] (2) Smelting alloy: The high-purity magnesium and zinc are batched according to the atomic ratio of 3:1. 2 Smelting in mixed gas with SF6, in which CO 2 The volume ratio to SF6 is 100:1; nano-SiO, which accounts for 4.2% of the alloy mass fraction, is added during the smelting process 2 , keep the temperature at 700 ° C, and disperse by ultrasonic method;

[0031] (3) Slowly cool the alloy ingot, the cooling rate is 0.2k per second; keep the vacuum state during the cooling process, the vacuum degree is 4torr;

[0032] (4) After cooling, the alloy ingot is processed into a disc shape;

[0033] (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 4.5GPa to the alloy, and rotate the pressure at a speed...

Embodiment 2

[0035] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium and high-purity zinc, and nano-SiC with an average particle size of 90 nanometers;

[0036] (2) Smelting alloy: The high-purity magnesium and zinc are batched according to the atomic ratio of 6:1. 2 Smelting in mixed gas with SF6, in which CO 2 The volume ratio to SF6 is 80:1; during the smelting process, nano-SiC, which accounts for 1.5% of the alloy mass fraction, is added, the temperature is kept at 700 °C, and the ultrasonic method is used for dispersion;

[0037] (3) Slowly cool the alloy ingot, the cooling rate is 0.3k per second; keep the vacuum state during the cooling process, the vacuum degree is 3torr;

[0038] (4) After cooling, the alloy ingot is processed into a disc shape;

[0039] (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 o...

Embodiment 3

[0041] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium and high-purity zinc, and nano-SiC with an average particle size of 60 nanometers;

[0042] (2) Smelting alloy: The high-purity magnesium and zinc are batched according to the atomic ratio of 3.5:1. 2 Smelting in mixed gas with SF6, in which CO 2 The volume ratio to SF6 is 50:1; during the smelting process, nano-SiC, which accounts for 1.8% of the alloy mass fraction, is added, the temperature is kept at 700 °C, and the ultrasonic method is used to disperse;

[0043] (3) Slowly cool the alloy ingot, the cooling rate is 0.5k per second; keep the vacuum state during the cooling process, the vacuum degree is 3torr;

[0044] (4) After cooling, the alloy ingot is processed into a disc shape;

[0045] (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 pressure at a s...

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Abstract

The invention relates to high-strength magnesium alloy and a preparation method thereof. Nano additives are doped in magnesium alloy, and the high-strength magnesium alloy is obtained. The average diameter of the nano additives is 200 nanometers or below, the average crystalline grain of the obtained magnesium alloy is 100 nanometers or below, and the yield strength of the alloy is 400 MPa or above. The magnesium alloy is prepared through the steps of smelting, doping of nano particles, dispersing, cooling, distortion and the like.

Description

technical field [0001] The invention relates to a high-strength magnesium alloy and a preparation method thereof, in particular to a nano-additive reinforced magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is a low-density metal material. As an engineering material, its structure is light and oxidation-resistant. It has been used in handheld electronic equipment, automobiles, aerospace and other fields. However, the strength of magnesium alloys is not high. As engineering materials, people usually expect high-strength materials. However, due to the atomic structure characteristics of magnesium alloys, their plasticity is poor, and current traditional processing methods cannot obtain high-strength magnesium alloys. [0003] Chinese Patent No. 102766774A provides a method for strengthening magnesium alloy doped SiC particles. In view of the low modulus, low strength, easy wear, poor high temperature resistance and high thermal e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C32/00C22C1/10
CPCC22C1/1036C22C21/00C22C32/00
Inventor 何枇林朱浩李德辉
Owner 江苏捷晖电子科技有限公司
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