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A method for preparing magnesium-aluminum-based materials reinforced with silicon carbide particles by rotary infiltration

A silicon carbide particle and magnesium-aluminum-based technology is applied in the field of preparing silicon carbide particle-reinforced magnesium-aluminum-based materials by rotary infiltration, which can solve the problems of insufficient performance and low content of nano-SiC particles, and improve mechanical properties and stability. , The particle distribution is uniform, and the effect of promoting organization

Active Publication Date: 2018-07-17
宁夏和兴碳基材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above prior art that the performance of the composite material can be significantly improved by changing the processing method of the nano-SiC particle reinforced magnesium alloy, but its performance cannot fully meet the applications in some special fields, and the content of the nano-SiC particle is low. It is necessary to further improve the comprehensive performance of nano-SiC particle reinforced magnesium alloys and expand its application fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) According to the volume ratio of 70:30, the metal magnesium powder with a particle size of 100 μm and the silicon carbide with a particle size of 10 μm are used as raw materials. After ball milling, they are heated and stirred at 550 ° C to obtain a composite slurry. The material is poured into a water-cooled mold, cooled and solidified to obtain a silicon carbide granular magnesium-based composite material prefabricated part.

[0028] (2) Put the aluminum-magnesium-silicon alloy in a crucible and melt it to a liquid state at 700° C. to obtain a liquid aluminum-magnesium-silicon alloy, which is kept warm for use.

[0029] (3) Without inert gas protection, a piece of silicon carbide granular magnesium-based composite material preform is completely immersed in the liquid aluminum-magnesium-silicon alloy, and the silicon carbide granular magnesium-based composite material preform is placed in the liquid aluminum-magnesium-silicon alloy at 300r / min Rotate internally at ...

Embodiment 2

[0032] (1) According to the volume ratio of 80:20, the metal magnesium powder with a particle size of 200 μm and the silicon carbide with a particle size of 20 μm are used as raw materials. After ball milling, they are heated and stirred at 650 ° C to obtain a composite slurry. The material is poured into a water-cooled mold, cooled and solidified to obtain a silicon carbide granular magnesium-based composite material prefabricated part.

[0033] (2) Put the aluminum-magnesium-silicon alloy in a crucible and melt it to a liquid state at 900° C. to obtain a liquid aluminum-magnesium-silicon alloy, which is kept warm for use.

[0034] (3) No inert gas protection is required. Two pieces of silicon carbide granular magnesium-based composite material preforms are completely immersed in the liquid aluminum-magnesium-silicon alloy. Rotate internally at a speed of 1 min, within the limit of not causing violent tumbling of the liquid aluminum-magnesium-silicon alloy, rotate for 90 minu...

Embodiment 3

[0037] (1) According to the volume ratio of 75:25, the metal magnesium powder with a particle size of 150 μm and the silicon carbide with a particle size of 13 μm are used as raw materials. After ball milling, they are heated and stirred at 575 ° C to obtain a composite slurry. The material is poured into a water-cooled mold, cooled and solidified to obtain a silicon carbide granular magnesium-based composite material prefabricated part.

[0038] (2) Put the aluminum-magnesium-silicon alloy in a crucible and melt it to a liquid state at 750° C. to obtain a liquid aluminum-magnesium-silicon alloy, which is kept warm for use.

[0039] (3) No inert gas protection is required. The three silicon carbide granular magnesium-based composite prefabricated parts are completely immersed in the liquid aluminum-magnesium-silicon alloy. Rotate internally at a speed of 1 min, within the limit of not causing violent tumbling of the liquid aluminum-magnesium-silicon alloy, rotate for 50 minute...

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Abstract

The invention provides a method for preparing a silicon carbide particle reinforced aluminum magnesium based material by rotary infiltration. The method comprises the following steps of: taking metal magnesium powder and silicon carbide as raw materials to prepare composite slurry; pouring the slurry into a water cooling mould, and cooling and condensing the slurry to obtain a silicon carbide particle magnesium based composite material prefabricated part; putting aluminum-magnesium-silicon alloy into a crucible to melt into a liquid state, thereby obtaining liquid-state aluminum-magnesium-silicon alloy; completely soaking one or more silicon carbide particle magnesium based composite material prefabricated parts into the liquid-state aluminum-magnesium-silicon alloy, rotating the silicon carbide particle magnesium based composite material prefabricated parts inside the liquid-state aluminum-magnesium-silicon alloy, and taking out the composite material prefabricated parts to clean, thereby obtaining an aluminum-magnesium-silicon alloy coated silicon carbide particle magnesium based composite material; and removing an oxidization film on the surface of the aluminum-magnesium-silicon alloy coated silicon carbide particle magnesium based composite material, putting the aluminum-magnesium-silicon alloy coated silicon carbide particle magnesium based composite material into a vacuum hot press furnace, heating to a solid-liquid two-phase temperature interval, applying outer pressure to compact, and cooling and condensing to obtain the silicon carbide particle reinforced aluminum magnesium based material.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a method for preparing silicon carbide particle-reinforced magnesium-aluminum-based materials by rotary impregnation. Background technique [0002] With the continuous development of science and technology in our country, the performance of metal matrix composites has been well researched and applied in many fields. Magnesium metal is known as a green engineering material in the 21st century. It has certain applications in aerospace, electronics industry, optical instrument manufacturing, national defense, automobile manufacturing and other fields. However, magnesium alloys have insufficient strength and toughness in the application process. However, due to the disadvantages of poor creep resistance, nanoparticle-reinforced magnesium alloy materials with advantages such as high strength, toughness and creep resistance have been paid attention t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C23/00C22C32/00
CPCC22C1/1015C22C1/1036C22C23/00C22C32/0063
Inventor 王海燕
Owner 宁夏和兴碳基材料有限公司
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