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A kind of high-strength light metal and its preparation method

A light metal, high-strength technology, applied in the field of high-strength light metal and its preparation, can solve the gap and other problems, achieve the effect of strengthening, increasing the volume fraction, and improving the plasticity of the alloy

Active Publication Date: 2018-02-09
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

[0007] The above inventions are all dedicated to improving the performance of magnesium alloys, especially the strength performance. However, their yield strengths are all below 300~400MPa, and there is still a big gap between their strength and the current long-term engineering materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium, aluminum, zinc, neodymium, and nano-SiC with an average particle size of 110;

[0033] (2) Smelting alloy: mix magnesium, aluminum, zinc, neodymium, and silicon carbide according to the mass ratio of 77%, 10%, 2%, 1%, and 10%, and mix them in CO 2 with SF 6 Melting in a mixed gas, where CO 2 with SF 6 The volume ratio is 100:1; nano-SiC is added during the smelting 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 0.2k per second; maintain a vacuum state during the cooling process, with a vacuum degree of 4torr;

[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 anvils, apply a high pressure of 5GPa to the alloy, and rotate the anvil at a...

Embodiment 2

[0043] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium, aluminum, zinc, neodymium, and SiC with an average particle size of 80 nanometers;

[0044] (2) Smelting alloy: mix magnesium, aluminum, zinc, neodymium, and silicon carbide according to the mass ratio of 73.7%, 5%, 8%, 1.3%, and 12%, and mix them in CO 2 with SF 6 Melting in a mixed gas, where CO 2 with SF 6 The volume ratio is 80:1; nano-SiC is added during the smelting process, the temperature is kept at 700 °C, and the ultrasonic method is used for dispersion;

[0045] (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;

[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 1.5GPa to the alloy, and rotate the pr...

Embodiment 3

[0054] (1) Prepare raw materials: prepare more than 99.9% high-purity magnesium, aluminum, zinc, neodymium, and SiC with an average particle size of 60 nanometers;

[0055] (2) Smelting alloy: mix magnesium, aluminum, zinc, neodymium, and silicon carbide according to the mass ratio of 78.3%, 6%, 6%, 0.7%, and 9%, and mix them in CO 2 with SF 6 Melting in a mixed gas, where CO 2 with SF 6 The volume ratio 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 0.5k per second; maintain a vacuum state during the cooling process with a vacuum degree of 3torr;

[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 pressure of 1.5GPa to the alloy, and rotate the pre...

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Abstract

The invention provides high-strength low-density light metal and a preparation method thereof. The metal is magnesium-based alloy and is prepared from, by mass, 3%-20% of zinc, 3%-8% of aluminum, 1%-3% of neodymium, 15%-25% of nano silicon carbide and the balance magnesium. The average diameter of silicon carbide is 200 nanometers or below, the average grain of the magnesium alloy is 100 nanometers or below, and the yield strength of the alloy can reach 400 MPa or above. The magnesium alloy is prepared through the steps of melting, doping of nano particles, dispersion, cooling, distortion, asymmetrical rolling and the like.

Description

technical field [0001] The invention relates to a high-strength light metal and a preparation method thereof, in particular to a silicon carbide-reinforced high-performance magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is a metal material with very low density, which has been used in handheld electronic devices, automobiles, aerospace and other fields. As engineering materials, people usually expect high-strength materials. However, due to the characteristics of the atomic structure of magnesium alloys, their plasticity is poor, and traditional processing methods cannot obtain high-strength magnesium alloys. The strength of current magnesium alloys is generally low. [0003] Chinese patent 103589920A discloses a magnesium-aluminum alloy and a preparation method thereof. The composition and weight percentage of the alloy are: scandium 1.2~2.5%, cerium 0.3%~0.8%, manganese 1.5%~2%, molybdenum 2.5%~5%, tungsten 0.12~1.2%, magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C23/00C22C32/00C22C30/06C22C30/00C22C1/02C22C1/10C22F1/06C22F1/16
CPCC22C1/02C22C1/1036C22C23/00C22C23/04C22C30/00C22C30/06C22C32/0063C22F1/06C22F1/16
Inventor 何枇林李德辉
Owner 西安翱翔新材料科技有限公司
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