Device and method for preparing particulate-reinforced aluminum matrix composites by stirring and casting

Abstract

The invention discloses a device and a method for preparing particulate-reinforced aluminum matrix composites by stirring and casting. The device comprises a lifting mechanism, a resistance furnace, a fixed column, a supporting mechanism, a stirring device, a particulate conveying device, a furnace lid, a feeding hole, a gas inlet tube, a graphite crucible and a stainless steel crucible. The device for preparing particulate-reinforced aluminum matrix composites by stirring and casting can be used for quantitatively conveying and adding reinforced particulates, and realizing gas protection and automatic preparation. The device is delicate in structural design, simple and convenient to operate, high in automation degree and good in stability. By virtue of the gas protection, gas absorption and surface oxidization of a melt in a preparation process based on stirring and casting are reduced; the quantitative conveying and adding of the reinforced particulates are realized by virtue of the particulate conveying device; the quantitative control on a stirring position and a stirring speed is realized by virtue of the lifting device and the stirring device, and thus, the performance and preparation efficiency of a composite material are well improved.

Description

Technical field [0001] The invention relates to a stirring casting preparation device of a metal-based composite material, in particular to a preparation device and a preparation method of a particle-reinforced aluminum-based composite material stirring casting. Background technique [0002] Particulate-reinforced Aluminum Matrix Composites (PAMCs) have low cost, simple preparation, and good material isotropy. Different properties can be achieved by controlling the type and content of reinforced particles added. Faster development. At present, PAMCs are mainly used in fields such as land transportation, electronic packaging, aerospace and infrastructure. [0003] The preparation methods of particle-reinforced aluminum-based composite materials mainly include powder metallurgy, stirred casting, spray deposition, and vacuum pressure infiltration. Among them, the stirring casting method is highly concerned by researchers due to its simple process, low equipment investment, low produ...

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Problems solved by technology

[0005] 1) The continuous quantitative addition of reinforcing particles cannot be realized by using the funnel method, which makes the preparation process of the composite material melt less stable, resulting in uneven distribution of particles in the melt and reducing the performance of the composite material;

[0006] 2) The composite material melt is prepared in an atmospheric environment, and a high-speed rotating agitator is used to stir the melt to form a vortex to inhale the reinforcing particles, which is easy to get involved in a large amount of gas and increase the gas content of the composite material melt, and the gas is easy to absorb particles and aggregate, resulting in Uneven distribution of particles; at the same time, exposed to the atmosphere for a long time, the surface of the melt is easily oxidized, which increases the content of oxide film in the composite material and reduces the quality and performance of the composite material;

[0007] 3) During the preparation process, the stirring operation, transportation and addition of particles are manually realized and lack of linkage, so the preparation efficiency and stability are low

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