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Preparation method for SiC particle reinforced aluminum-based composite material

A particle-reinforced aluminum and composite material technology, which is applied in the development and application of new materials, can solve the problems of silicon carbide particle-reinforced aluminum-based composite materials and lack of performance, and achieve excellent comprehensive physical and mechanical properties, weight reduction, Effect of enhancing thermal shock performance

Inactive Publication Date: 2014-01-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of systematic and in-depth research on the composition and properties of silicon carbide particle-reinforced aluminum matrix composites, and most of the imported products are used in practical applications.

Method used

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  • Preparation method for SiC particle reinforced aluminum-based composite material
  • Preparation method for SiC particle reinforced aluminum-based composite material
  • Preparation method for SiC particle reinforced aluminum-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0044] The target material was obtained, and its composition was characterized as: 79.5% Al-Si-Mg alloy, 7.5% Al-La master alloy, and 13% SiC particles.

[0045] (1) Put 500g of Al-Si-Mg alloy into a dry pot resistance furnace, raise the temperature to 780°C, and after it is completely melted, add 47g of the pre-prepared master alloy Al-R into the melt, under the protection of the covering agent Keep warm for 30min.

[0046] (2) Put 11g of C in a bell jar 2 Cl 6 Pressed into the alloy, the alloy is degassed and slag-refined.

[0047] (3) Keep the temperature in the furnace at 700°C, stir the melt with a stirring paddle for 30 minutes, so that the rare earth elements can be evenly distributed in the melt, and the La content in the material is 1.5%.

[0048] (4) Keep the temperature in the furnace at 700°C and add 80g of baked SiC to the melt. The process of adding SiC particles should be carried out in batches and slowly, and the addition should be stopped for a period of t...

Embodiment 2

[0055] The target material was obtained, and its composition was characterized as: 85.5% Al-Si-Mg alloy, 0.5% Al-La master alloy, and 14% SiC particles.

[0056] (1) Put 500g of Al-Si-Mg alloy into a dry pot resistance furnace, raise the temperature to 780°C, and after it is completely melted, add 3g of the pre-prepared master alloy Al-La into the melt, under the protection of the covering agent Keep warm for 30min.

[0057] (2) Put 10gC in a bell jar 2 Cl 6 Pressed into the alloy, the alloy is degassed and slag-refined.

[0058] (3) Keep the temperature in the furnace at 710°C, and stir the melt with a stirring paddle for 30 minutes, so that the rare earth elements can be evenly distributed in the melt. The content of La in the material is 0.01%.

[0059] (4) Keeping the temperature in the furnace at 710° C., add 82 g of baked SiC particles to the melt. The process of adding SiC particles should be carried out in batches and slowly, and the addition should be stopped for...

Embodiment 3

[0066] Obtain the target material, the composition is characterized as: 75.5% Al-Si-Mg alloy, 12.5% ​​Al-La master alloy, 12% SiC particles

[0067] (1) Put 500g of Al-Si-Mg alloy into a dry pot resistance furnace, raise the temperature to 780°C, and after it is completely melted, add 83g of the pre-prepared master alloy Al-La into the melt, under the protection of the covering agent Keep warm for 30min.

[0068] (2) Put 11.6gC in a bell jar 2 Cl 6 Pressed into the alloy, the alloy is degassed and slag-refined.

[0069] (3) Keep the temperature in the furnace at 700°C, and stir the melt with a stirring paddle for 30 minutes, so that the rare earth elements can be evenly distributed in the melt. The content of La in the material is 2.5%.

[0070] (4) Keeping the temperature in the furnace at 700° C., add 80 g of baked SiC particles to the melt. The process of adding SiC particles should be carried out in batches and slowly, and the addition should be stopped for a period o...

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Abstract

The invention provides a preparation method for SiC particle reinforced aluminum-based composite material. The preparation method comprises the steps as follows: step 1, the Al-Si-Mg alloy is placed into a homemade dry pot resistance furnace, after the Al-Si-Mg alloy is completely melted, 1-17 parts of intermediate alloy Al-R by weight, which is prepared in advance, is added into the melt, wherein the intermediate alloy is prepared in advance through a surface modification technology; step 2, the melt is stirred to enable rare-earth elements to be uniformly distributed into the melt; step 3, SiC is added into the melt; step 4, the melt is poured into a metal mould for formation; step 5, quenching is performed in water with the temperature of 50-60 DEG C; step 6, quenching is performed in water with the temperature of 70-80 DEG C; step 7, air cooling is performed after aging thermal insulation is performed for 6.5-7.5 h at the temperature of 165-175 DEG C. The thermal shock performance of the aluminum-based composite material can be greatly enhanced, the dimensional stability of the material is maintained when the material is used in temperature varying places, the service life of the material is prolonged, and the material has a broad market prospect when being applied to parts requiring weight reduction and excellent abrasion resistance.

Description

technical field [0001] The invention belongs to the development and application of new materials. Background technique [0002] Silicon carbide particle reinforced aluminum matrix composites have high specific strength, specific stiffness, elastic modulus, wear resistance, high temperature resistance, and good thermal conductivity. They are widely used in aviation, aerospace, automobile, electronics, transportation and other industrial fields Has been widely used. At present, there is still a lack of systematic and in-depth research on the composition and properties of silicon carbide particle-reinforced aluminum matrix composites, and most of the imported products are used in practical applications. Contents of the invention [0003] The object of the present invention discloses a preparation process of SiC particle reinforced aluminum matrix composite material, which can produce high specific strength, specific stiffness, elastic mold by adopting certain alloy compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10B22D19/14
Inventor 何国求卢棋刘晓山何乔佘萌袁永利杨洋
Owner TONGJI UNIV
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