High-strength plasticity aluminum-base composite material employing TiB2 particles and preparation method thereof

Abstract

The invention provides a high-plasticity aluminum-based composite material containing TiB2 particles and a preparation method thereof, and relates to an aluminum-based composite material and a preparation method thereof. The invention solves the problems of the prior art, such as poor plasticity and toughness and difficulty in secondary processing. The composite material contains (by volume) titanium diboride reinforcement particles 10-25 percent, aluminum particles 25-35 percent, and aluminum alloy matrix in balance. The preparation method comprises: (1) weighing titanium diboride reinforcement particles, aluminum particles and aluminum alloy matrix; (2) mixing by mechanical dry method to obtain a reinforcement powder; (3) placing the reinforcement powder in a die and compression-molding; (4) heating the die; (5) melting aluminum alloy and casting in the die; (6) applying a pressure on the die with molten aluminum and maintaining the pressure for a period of time and cooling; (7) demoulding and taking the cast ingot, that is reinforced aluminum-based composite material. The inventive aluminum-based composite material has high plasticity and good wear resistance and is adapted to secondary processing and machining.

Description

technical field [0001] The invention relates to a reinforced aluminum-based composite material and a preparation method thereof, in particular to a high-strength plastic granular aluminum-based composite material and a preparation method thereof. Background technique [0002] Particle-reinforced metal matrix composites not only have some excellent properties of fiber- and whisker-reinforced metal-matrix composites, but also have the advantages of cheap reinforcement, relatively simple preparation process, easy secondary processing, isotropic performance and durability. Grinding and other advantages, so it is widely used. In the environment where the specific strength and specific modulus are not particularly high, such as aviation, aerospace structural parts, automobiles, motorcycle parts, textile machinery and other fields, particle reinforced composite materials have shown incomparable advantages over traditional metal materials. Therefore, it is expected to partially rep...

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Problems solved by technology

[0003] The present invention aims to solve the problem of low toughness of existing particle-reinforced aluminum-based composite materials: due to the addition of brittle reinforcements, the plasticity and toughness of the alloy are reduced to varying degrees, especially the plasticity of the material is compared with the corresponding unreinforced matrix alloy. , reduced by more than an order of magnitude, this phenomenon not only makes it difficult to guarantee its safety as a structural part, but also makes it difficult to achieve secondary processing, making it difficult to form some parts with complex structures; on the other hand, the existing TiB 2 The preparation process of / Al composite materials has strict requirements on the atmosphere (humidity, oxygen content, etc.), and high requirements on equipment and environment, so it is inevitable that there will be residual reactants in the composite material, and the composition is complex, which will affect the material performance. especially low toughness

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