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A method for preparing hybrid particle reinforced aluminum matrix composite material by composite strengthening method

A particle-reinforced aluminum and composite material technology, which is applied in the field of hybrid particle-reinforced aluminum-based composite materials prepared by the composite strengthening method, can solve the problems of difficult control of the reinforcement phase, difficult uniform distribution of the reinforcement phase, and low efficiency of the extrusion casting infiltration method, and achieves good results. Dispersion strengthening effect, high hardness and wear resistance, performance improvement effect

Active Publication Date: 2020-02-18
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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AI Technical Summary

Problems solved by technology

The research on the preparation of aluminum matrix composites with high hardness and high wear resistance by using hybrid particle reinforcement is basically blank. The particle size and type of the hybrid particle reinforcement phase, the properties of the aluminum alloy matrix, and the bonding interface between the reinforcement phase particles and the matrix need to be further studied. These problems are closely related to the preparation methods of composite materials. At present, the most commonly used methods for preparing particle-reinforced aluminum matrix composites include powder metallurgy, in-situ synthesis, stirring casting, and squeeze casting. Such problems, such as the composite material prepared by the powder metallurgy method has a certain porosity, the synthesis reaction of the in-situ synthesis method and the control of the reinforced phase generated are relatively difficult, the reinforced phase of the stirred casting method is not easy to be uniformly distributed, and the extrusion casting infiltration method is efficient. Therefore, the research on the preparation process of hybrid particle reinforced aluminum matrix composites is also particularly important

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  • A method for preparing hybrid particle reinforced aluminum matrix composite material by composite strengthening method

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preparation example Construction

[0031] figure 1 It is a schematic flow chart of the preparation method of the present invention. The present invention provides a method for preparing hybrid particle-reinforced aluminum-based composite materials by composite strengthening method. The raw material formula of the composite material is composed of: matrix Al-Si alloy powder with a Si content of 13-17% , in-situ reactant nano-CuO powder, micro-SiC particles; the reinforcing phase in the composite material includes micro-SiC particles, nano-Al 2 o 3 Granular and micron AlCu 3 Particles, in which micron SiC particles are added materials, nano-Al 2 o 3 Granular and micron AlCu 3 The particles are prepared by in-situ reaction; the preparation process of the composite material adopts the composite strengthening method, including strengthening by adding micron SiC particles, in-situ synthesis of nano-Al 2 o 3 Granular and micron AlCu 3 Various strengthening methods such as particle strengthening, hot pressing di...

Embodiment 1

[0039] The volume fraction and particle size of each component of the solid powder in the raw material are as follows: Al-Si alloy powder 82%, particle size 40 µm, Si content 15%, CuO powder 3%, average particle size 60 nm, SiC particles 15%, The particle size is 75 µm.

[0040] A method for preparing hybrid particle-reinforced aluminum-matrix composite materials by composite strengthening method, comprising the following steps:

[0041] (1) Pretreatment of micron SiC particles: put micron SiC particles into a mixed solution of 20% acetone and 20% isopropanol by volume, ultrasonicate for 40 min, dry at 100 °C for 30 min, and put them into the tube Incubate at 700 °C for 1 h in a vacuum furnace;

[0042] (2) Raw material powder mixing and mixing: the second vacuum ball milling process is used for mixing, the first vacuum ball milling: the nano-CuO powder and the composite material matrix are mixed in a vacuum ball mill, ceramic balls are used, and the ball-to-material ratio is...

Embodiment 2

[0052] The volume fraction and particle size of each component of the solid powder in the raw material are as follows: Al-Si alloy powder 81.5%, particle size 40 µm, Si content 17%, CuO powder 3.5%, average particle size 60 nm, SiC particles 15%, particle size is 60 µm.

[0053] A method for preparing hybrid particle-reinforced aluminum-matrix composite materials by composite strengthening method, comprising the following steps:

[0054] (1) Pretreatment of micron SiC particles: put micron SiC particles into a mixed solution of 30% acetone and 10% isopropanol by volume, ultrasonicate for 40 min, dry at 100 °C for 30 min, and put them into tubes. Insulated in a vacuum furnace at 700 °C for 1 h;

[0055] (2) Raw material powder mixing and mixing: the second vacuum ball milling process is used for mixing, the first vacuum ball milling: the nano-CuO powder and the composite material matrix are mixed in a vacuum ball mill, ceramic balls are used, and the ball-to-material ratio is 15...

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Abstract

The invention provides a formula and a preparation method for preparing a hybrid particle reinforced aluminum matrix composite material with a compound reinforcement method. The raw material formula composition of the composite material is that Al-Si alloy powder is adopted as a matrix, and nanometer CuO powder and micrometer SiC particles are adopted as in-situ reactants. An Al-Si alloy is adopted as the matrix of the composite material, and the reinforced phases are hybrid particles including micrometer SiC particles, nanometer Al2O3 particles and micrometer AlCu3 particles, wherein the micrometer SiC particles are additionally added, and the nanometer Al2O3 particles and the micrometer AlCu3 particles are prepared by an in-situ reaction. The compound reinforcement method comprises methods such as additionally-added SiC particle reinforcement, in-situ synthesized Al2O3 and AlCu3 particle reinforcement, hot-pressing die forging reinforcement, thermal treatment reinforcement and the like. The preparation technological process of the composite material comprises pretreatment of SiC particles, raw material matching and mixing, die-filling, heating in-situ reacting, hot-pressing die-forging and solid solution and aging heat treatment. The hybrid particle reinforced aluminum matrix composite material prepared with the compound reinforcement method has higher rigidity and abrasive resistance and can be applied to lightweight abrasion-resistant parts such as pistons, cylinder sleeves, brake discs and the like.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum-based composite materials, and in particular relates to a method for preparing mixed particle-reinforced aluminum-based composite materials by a composite strengthening method. Background technique [0002] With the rapid development of metal matrix composites, particle reinforced aluminum matrix composites, as a material with potential application prospects, because of its high specific stiffness, high specific strength, small thermal expansion coefficient, good wear resistance, heat resistance and excellent Excellent characteristics such as dimensional stability can replace steel materials, aluminum alloys and titanium alloys to produce high-performance lightweight parts, so they are widely used in aerospace structural parts, advanced weapons, auto parts, rail transit and sports equipment. At present, most of the reinforcement phases of particle-reinforced aluminum-matrix composites are re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00C22C32/00
CPCC22C1/058C22C21/00C22C32/0005
Inventor 高红霞李莹王艳陈宝龙王蒙樊江磊周向葵吴深
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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