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A kind of preparation method of micron SIC particle reinforced aluminum matrix composite material

A technology for particle-reinforced aluminum and composite materials, 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, high porosity, and the performance of castings is difficult to meet production needs, so as to improve the uniformity of the structure. and mechanical properties, reducing porosity and improving wettability

Active Publication Date: 2021-08-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • 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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  • A kind of preparation method of micron SIC particle reinforced aluminum matrix composite material
  • A kind of preparation method of micron SIC particle reinforced aluminum matrix composite material
  • A kind of preparation method of micron SIC particle reinforced aluminum matrix composite material

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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 discloses a method for preparing an aluminum-based composite material reinforced by micron SiC particles, and relates to a method for preparing the aluminum-based composite material. The invention aims to solve the problems of non-uniform particle distribution, high porosity and difficult performance of castings in the existing semi-solid stirring casting to meet production needs. The invention adopts ultrasonic-assisted semi-solid stirring casting and constant-temperature rapid prototyping to prepare micro-SiC particle-reinforced aluminum-based composite materials with low cost, uniform particle distribution and low porosity. Forging can eliminate the as-cast loose defects produced by the metal during the smelting process and optimize the microstructure. At the same time, due to the preservation of the complete metal flow line, the mechanical properties of forgings are better than castings of the same material. For important parts with high loads and severe working conditions in related machinery, forgings are mostly used, except for plates, profiles or weldments that can be rolled with simpler shapes. So forging deformation has obvious application value. The invention is applied to the preparation of low-cost particle-reinforced aluminum-based composite materials.

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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Patent Type & Authority Patents(China)
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