Method for preparing aluminum matrix composite through high pressure solidification after semi-solid mechanical stirring

An aluminum-based composite material and mechanical stirring technology, which is applied in the field of preparing aluminum-based composite materials, can solve the problems of harmful reinforcement and metal, and achieve the effects of uniform distribution and high nucleation rate.
CN103103374BActive Publication Date: 2015-01-28HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2015-01-28

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Abstract

The invention provides a method for preparing an aluminum matrix composite through high pressure solidification after semi-solid mechanical stirring and relates to a method for preparing the aluminum matrix composite. The method provided by invention aims to solve the problems of the stirring casting method of needing to evenly distribute reinforcements in the matrix metal, and needing to avoid harmful reaction between the reinforcements and the metal at high temperatures, and reducing the casting shortcomings generated in the solidification process. The method comprises the following steps of: 1, preparing SiC slurry; 2, preparing reinforcement particles; 3, preparing alumium alloy melt; 4, preparing compound slurry; 5, increasing the temperature and stirring; and 6, obtaining the alumium matrix composite. The method provided by the invention avoids harmful reaction between the reinforcements and the matrix metal and the formation of casting shortcomings, and also avoids harmful reaction between the reinforcements and the matrix metal at a high temperature in full liquid state. The method is used for preparing the alumium matrix composite.
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Description

technical field

[0001] The present invention relates to a method for preparing an aluminum matrix composite material. Background technique

[0002] Compared with metals, metal matrix composites have excellent properties such as high specific strength, specific stiffness, wear resistance, low thermal expansion coefficient, good thermal conductivity and dimensional stability. Silicon carbide particles reinforced aluminum matrix composites are a typical representative of metal matrix composites. Compared with other reinforcements, SiC particles have a lower preparation cost, which makes composite materials have a good low-cost advantage. This composite material can be used as aerospace bearing materials, heat dissipation and packaging materials for electronic components, and automotive brake disc materials. The preparation methods of this composite material mainly include solid-phase method (powder metallurgy method, etc.) and liquid-phase method (squeeze casting method, spray...

Claims

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