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Preparation method for micrometer SiC particle reinforced aluminum matrix composite material

A technology for particle-reinforced aluminum and composite materials, which is applied in the field of preparation of aluminum-based composite materials, can solve the problems of uneven distribution of particles in semi-solid stirring casting, difficulty in meeting production requirements and high porosity of castings, and achieves uniform macroscopic distribution and optimization. Microstructure, effect of low porosity

Active Publication Date: 2020-06-02
TAIYUAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of uneven particle distribution, high porosity, and difficulty in meeting the production requirements of the existing semi-solid stirred casting casting, and provides a preparation method of micron SiC particle-reinforced aluminum-based composite material

Method used

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  • Preparation method for micrometer SiC particle reinforced aluminum matrix composite material
  • Preparation method for micrometer SiC particle reinforced aluminum matrix composite material
  • Preparation method for micrometer SiC particle reinforced aluminum matrix composite material

Examples

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specific Embodiment approach 1

[0028] Specific implementation mode 1: This implementation mode is a preparation method of a micron SiC particle reinforced aluminum matrix composite material, which is specifically carried out according to the following steps:

[0029] 1. Surface treatment of SiC particles: completely submerge SiC particles in HF aqueous solution with a volume fraction of 10%, ultrasonically clean them for 1h to 3h, then let them stand until SiC particles are completely precipitated, take out SiC particles, and wash SiC particles with distilled water until The washing liquid is neutral, and then oxidize the surface of SiC particles by high-temperature roasting. The temperature of high-temperature roasting is 800 ° C to 1300 ° C, the roasting time is 1 h to 10 h, cooled to room temperature, and sealed for storage;

[0030] 2. Semi-solid stirring and ultrasonic: remove the oxide layer on the surface of 2024 aluminum alloy, then heat the 2024 aluminum alloy to 700 ℃ ~ 800 ℃ in a protective atmosp...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment differs from Embodiment 1 in that the protective atmosphere described in step 2 is argon. Others are the same as the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the method for refining and removing slag described in step two is: add hexachloroethane to liquid aluminum under protective atmosphere, and in protective atmosphere and 700°C to 800°C for 20 minutes, the mass of hexachloroethane is 0.6% of the mass of liquid aluminum. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of an aluminum matrix composite material, and particularly provides a preparation method for a micrometer SiC particle reinforced aluminum matrix composite material, mainly aiming at solving the problems that existing semi-solid stir casting particles are unevenly distributed, the porosity is high, and a forge piece fails to meet production needs. Themicrometer SiC particle reinforced aluminum matrix composite material which is low in cost, uniform in particle distribution and low in porosity is prepared under the cooperation of ultrasonic-assisted semi-solid stir casting and constant-temperature quick formation. Through casting, the as-cast porosity defects, generated in the smelting process, of metal can be eliminated, the microstructure isoptimized, and because a complete metal flow line is saved, the mechanical property of a forge piece is better than that of the forge piece made from the same material. Most high-load important partswhich are under severe working conditions in relative machines adopt the forge pieces except for available rolling plates or profiles or welding pieces in simple shapes. Accordingly, the application value of forging deformation is obvious. The preparation method is used for preparing the low-cost particle reinforced aluminum matrix composite material.

Description

technical field [0001] The invention relates to a preparation method of an aluminum-based composite material. Background technique [0002] Particle-reinforced aluminum matrix composites have the advantages of high specific strength, high specific modulus, small thermal expansion coefficient, good high temperature resistance and wear resistance, and have been widely used as lightweight structural materials in aerospace, transportation, etc. transportation and other fields. In recent years, with the rapid development of the domestic aerospace industry, automobile, and electronics industries, the demand for particle-reinforced aluminum matrix composites is increasing year by year. The main preparation processes of particle reinforced aluminum matrix composites include powder metallurgy, spray deposition, squeeze casting, stirring casting and other processes. Composite materials prepared by powder metallurgy have excellent performance, but the process is long and complex, the...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/06C22C1/02C22C21/00C22C32/00C22F1/04
CPCC22C1/06C22C1/1005C22C1/1036C22C21/00C22C32/0063C22F1/04
Inventor 邓坤坤曹富翔吴玉程聂凯波王晓军梁伟
Owner TAIYUAN UNIV OF TECH
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