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SiC particle reinforced aluminium-based composite and preparation method thereof

A particle-reinforced aluminum and composite material technology, applied in the field of aluminum-based composite materials, can solve the problems of material tensile strength, yield strength elongation and hardness reduction, reduction of material mechanical properties, uneven particle distribution, etc., to reduce the surface Tension, increase particle distribution uniformity, and improve the effect of distribution uniformity

Active Publication Date: 2017-02-22
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] At present, SiC particle-reinforced aluminum-matrix composites prepared by stirring casting method mainly use existing grades of cast or deformed aluminum alloys as the matrix. These alloys are not developed for aluminum-matrix composites. Particle agglomeration and casting defects appear (such as: Microstructure and properties of A356-10%SiC particle composite castings at different solidification pressures[J].Transactions of Nonferrous Metals Society of China,2013,23(8):2222-2228; Studies on squeeze casting of Al 2124alloy and 2124-10%SiCp mental matrixcomposites[J].Materials Science and Engineering:A,2008,490(1-2):235-241), resulting in low mechanical properties
[0004] In recent years, researchers have conducted a lot of research on the preparation of SiC particle reinforced aluminum matrix composites by stirring casting method. The research shows that with the increase of particle volume fraction, the yield strength and hardness of the material gradually increase, and the elongation gradually decreases; As the particle size increases, the tensile strength, yield strength, elongation and hardness of the material are all reduced; at the same time, it is also found that small-sized particles are prone to agglomeration, resulting in uneven distribution of particles, thereby reducing the mechanical properties of the material

Method used

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  • SiC particle reinforced aluminium-based composite and preparation method thereof
  • SiC particle reinforced aluminium-based composite and preparation method thereof
  • SiC particle reinforced aluminium-based composite and preparation method thereof

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Embodiment 1

[0037] A SiC particle reinforced aluminum matrix composite material, the raw materials used are: industrial pure aluminum, pure Mg, Al-7% Si, Al-10% Mn, Al-5% Ti-B, Al-50% Cu, the particle size is 20 μm SiC particles. Among them, the composition of the matrix AlMgSi alloy is: Mg content 1.3%, Si content 0.92%, Mn content 0.1%, Fe content 0.03%, Ti content 0.1%, Cu content 0.3%, the rest is Al; SiC particle volume fraction is 10 %.

[0038] The preparation process of the SiC particle reinforced aluminum matrix composite material of this embodiment is as follows:

[0039] (1) Preparation and smelting of AlMgSi alloy: weigh appropriate amount of industrial pure aluminum, pure Mg, Al-7%Si, Al-10%Mn, Al-5%Ti-B, Al-50% according to the composition requirements of AlMgSi alloy Cu; raise the temperature of the crucible resistance furnace to 200°C and keep it warm for 1 hour. After the temperature is stable, add the weighed industrial high-purity aluminum, Al-7% Si, Al-10% Mn, and Al...

Embodiment 2

[0048] A SiC particle reinforced aluminum matrix composite material, the raw materials used are: industrial pure aluminum, pure Mg, Al-7% Si, Al-10% Mn, Al-5% Ti-B, Al-50% Cu, the particle size is 10 μm SiC particles. Among them, the composition of the matrix AlMgSi alloy is: Mg content 1.0%, Si content 0.8%, Mn content 0.8%, Fe content 0.25%, Ti content 0.1%, Cu content 0.5%, the rest is Al; SiC particle volume fraction is 13 %.

[0049] The preparation process of the SiC particle reinforced aluminum matrix composite material of this embodiment is as follows:

[0050] (1) Preparation and melting of AlMgSi alloy. Weigh an appropriate amount of industrial pure aluminum, pure Mg, Al-7% Si, Al-10% Mn, Al-5% Ti-B, Al-50% Cu according to the composition requirements of the AlMgSi alloy; raise the temperature of the crucible resistance furnace to 100 ℃ for 2 hours, after the temperature is stable, add the weighed industrial high-purity aluminum, Al-7%Si, Al-10%Mn, Al-50%Cu into t...

Embodiment 3

[0057] A SiC particle reinforced aluminum matrix composite material, the raw materials used are: industrial pure aluminum, pure Mg, Al-7% Si, Al-10% Mn, Al-5% Ti-B, Al-50% Cu, the particle size is 15 μm SiC particles. Among them, the composition of the matrix AlMgSi alloy is: Mg content 2.5%, Si content 2.0%, Mn content 0.5%, Fe content 0.15%, Ti content 0.3%, Cu content 0.2%, the rest is Al; SiC particle volume fraction is 9 %.

[0058] The preparation process of the SiC particle reinforced aluminum matrix composite material of this embodiment is as follows:

[0059] (1) Preparation and melting of AlMgSi alloy. Weigh an appropriate amount of industrial pure aluminum, pure Mg, Al-7%Si, Al-10%Mn, Al-5%Ti-B, Al-50%Cu according to the composition requirements of the AlMgSi alloy; raise the temperature of the crucible resistance furnace to 300 ℃ for 1 hour, after the temperature is stable, add the weighed industrial high-purity aluminum, Al-7%Si, Al-10%Mn, Al-50%Cu into the cru...

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Abstract

The invention discloses an SiC particle reinforced aluminium-based composite. The SiC particle reinforced aluminium-based composite is characterized in that AlMgSi alloy is adopted as a matrix; SiC particles are adopted as reinforcement bodies; the size of the SiC particles is 10 to 20 <mu>m; and the total volume of the SiC particles takes up 9 to 13% of the total volume of the composite. The invention further discloses a preparation method of the SiC particle reinforced aluminium-based composite. The preparation method is characterized in that stir casting and squeeze casting preparation methods are combined. According to the SiC particle reinforced aluminium-based composite and the preparation method, the particle distribution uniformity of the SiC particle reinforced aluminium-based composite is improved, SiC particle aggregation and shrinkage porosity and cavity defects of the composite are effectively decreased, and the SiC particle reinforced aluminium-based composite which has good strength and toughness and achieves uniform particle distribution is obtained.

Description

technical field [0001] The invention relates to an aluminum-based composite material, in particular to a SiC particle-reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Particle reinforced aluminum matrix composites PAMCs (Particle reinforced aluminum matrixcomposites, referred to as PAMCs) have the advantages of high specific strength, high specific stiffness, good wear resistance, good shock absorption, etc., and can be enhanced by changing the type, content, size, etc. To achieve different mechanical and performance properties, it has developed rapidly in recent years. SiC particles have the advantages of small thermal expansion coefficient, high strength, low density, and good wear resistance, making SiC particles reinforced aluminum matrix composites have broad application prospects. The stirring casting method has the characteristics of simple required equipment, convenient operation, low cost, and high product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C32/00C22C1/03C22C1/10
CPCC22C1/026C22C1/03C22C1/1005C22C1/1036C22C21/08C22C32/0063C22C1/1052
Inventor 赵海东李芳东朱刚胡启耀
Owner SOUTH CHINA UNIV OF TECH
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