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

A magnesium-aluminum alloy and high-strength technology, which is applied in the field of silicon carbide reinforced high-performance magnesium-aluminum alloy and its preparation, can solve problems such as gaps, and achieve the effect of enhancing effect, improving alloy plasticity and increasing volume fraction.

Active Publication Date: 2018-05-18
安镁金属制品(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above inventions are all dedicated to improving the performance of magnesium-aluminum alloys, especially the strength performance. However, their tensile strengths are all below 400MPa, and their strengths are still relatively low compared to commonly used engineering materials (steel, titanium alloys, carbon fibers, aluminum alloys, etc.). big gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Prepare raw materials: prepare high-purity magnesium, aluminum, zirconium, neodymium, and yttrium with a purity of more than 99.9%, and nano-SiC with an average particle size of less than 200 nanometers;

[0033] (2) Smelting alloy: mix magnesium, aluminum, zirconium, neodymium, yttrium, and silicon carbide according to the mass ratio of 66.5%, 18%, 2.5%, 1.5%, 1.5%, and 8%, and mix them in CO 2 Smelted in a mixed gas with SF6, where CO 2 The volume ratio to SF6 is 100:1; nano-SiC is added during the melting process, the temperature is kept at 700 °C, and the ultrasonic method is used for dispersion;

[0034] (3) Slowly cool the alloy ingot at a cooling rate of 0.3k per second; maintain a vacuum state during the cooling process with a vacuum degree of 3torr;

[0035] (4) After cooling, the alloy ingot is processed into a disc shape;

[0036] (5) Put the coarse-grained alloy disc processed in step (4) into the space formed by the grooves in the upper and lower anvi...

Embodiment 2

[0043] (1) Prepare raw materials: prepare high-purity magnesium, aluminum, zirconium, neodymium, and yttrium with a purity of more than 99.9%, and nano-SiC with an average particle size of less than 200 nanometers;

[0044] (2) Smelting alloy: mix magnesium, aluminum, zirconium, neodymium, yttrium, and silicon carbide according to the mass ratio of 76.2%, 15%, 1%, 1%, 0.8%, and 6%. 2 Smelted in a mixed gas with SF6, where CO 2 The volume ratio to SF6 is 80:1; add nano-SiC during the melting process, keep the temperature at 700 °C, and disperse by ultrasonic method;

[0045] (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;

[0046] (4) After cooling, the alloy ingot is processed into a disc shape;

[0047] (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,...

Embodiment 3

[0054] (1) Prepare raw materials: prepare high-purity magnesium, aluminum, zirconium, neodymium, and yttrium with a purity of more than 99.9%, and nano-SiC with an average particle size of less than 200 nanometers;

[0055] (2) Smelting alloy: mix magnesium, aluminum, zirconium, neodymium, yttrium, and silicon carbide according to the mass ratio of 66.5%, 19%, 1.5%, 1%, 1%, and 11%. 2 Smelted in a mixed gas with SF6, where CO 2 The volume ratio to SF6 is 50:1; nano-SiC is added during the smelting process, the temperature is kept at 700 °C, and the ultrasonic method is used for dispersion;

[0056] (3) Slowly cool the alloy ingot at a cooling rate of 0.2k per second; maintain a vacuum state during the cooling process, with a vacuum degree of 4torr;

[0057] (4) After cooling, the alloy ingot is processed into a disc shape;

[0058] (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 pres...

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Abstract

The invention discloses high-strength magnalium alloy. The magnalium alloy comprises magnesium, aluminum, zirconium, neodymium, yttrium and silicon carbide. Specifically, the magnalium alloy comprises 10%-20% by mass of the aluminum, 1%-5% by weight of the zirconium, 1%-3% by mass of the neodymium, 1%-3% by weight of the yttrium, 10%-25% by mass of the nanoscale silicon carbide, and the balance magnesium. According to the high-strength magnalium alloy, the nanoscale silicon carbide is mixed into the magnalium alloy, and the high-strength magnalium alloy is obtained. The average diameter of the silicon carbide of the high-strength magnalium alloy is 200 nanometers or less, the average crystal size of the magnalium alloy is 80 nanometers or less, and the tensile strength of the magnalium alloy can reach 400 MPa or above. The magnalium alloy is prepared through the steps of smelting, nano-particle mixing and dispersing, cooling, distorting, asymmetrical rolling and the like.

Description

technical field [0001] The invention relates to a high-strength magnesium-aluminum alloy and a preparation method thereof, in particular to a silicon carbide-reinforced high-performance magnesium-aluminum alloy and a preparation method thereof. Background technique [0002] Magnesium-aluminum alloy is a light metal material with the advantage of low density. It has been used in handheld electronic devices, automobiles, aerospace and other fields. At the same time, 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-aluminum alloys, their plasticity is poor, and high-strength magnesium-aluminum alloys cannot be obtained yet. [0003] Chinese patent CN 103031452 A 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 ...

Claims

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Application Information

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IPC IPC(8): C22C23/02C22C32/00C22C1/02
CPCC22C1/02C22C23/02C22C32/0063
Inventor 何枇林李德辉朱浩
Owner 安镁金属制品(深圳)有限公司
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