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Device and method for preparing aluminum-base composite material by using vacuum impregnation andsolid-liquid direct extrusion

An aluminum matrix composite material and vacuum infiltration technology, which is applied in the field of material forming, can solve the problems of high critical infiltration pressure, low density, difficult to guarantee high vacuum degree, etc., so as to improve the performance and density of aluminum matrix composite materials. The effect of improving, improving performance

Active Publication Date: 2012-09-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Description
  • Claims
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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art of high critical infiltration pressure of preforms with high volume fraction, difficulty in ensuring high vacuum degree, and low density, and realize the overall and near-net forming of some complex aluminum matrix composite parts, this paper The invention proposes a vacuum impregnation-solid-liquid direct extrusion device and method for preparing aluminum matrix composites

Method used

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  • Device and method for preparing aluminum-base composite material by using vacuum impregnation andsolid-liquid direct extrusion
  • Device and method for preparing aluminum-base composite material by using vacuum impregnation andsolid-liquid direct extrusion
  • Device and method for preparing aluminum-base composite material by using vacuum impregnation andsolid-liquid direct extrusion

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Embodiment 1

[0028] This embodiment is a vacuum impregnation-solid-liquid direct extrusion device for preparing aluminum-based composite materials, including a melting crucible 1, a top block 4, a punch 9, a bottom pad 10, a push rod 11, a mold support 12, and a mold Overcoat 13 and concave block 14, and the vacuum furnace that is used in conjunction with, electric resistance heating furnace and four-column hydraulic press etc. The melting crucible 1 is placed on the upper surface of the bottom pad 10, and the bottom pad 10 and the mold jacket 13 are directly placed on the mold support 12, and the mold support 12 is fixed on the workbench of the four-column hydraulic press in the test. The top block 4 was placed at the bottom of the inner cavity of the melting crucible 1 before the test. At the center of the mold support 12, the center of the bottom pad 10 and the center of the bottom plate of the melting crucible 1, there are through holes for the ejector rod 11, and the center of the mol...

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Abstract

The invention relates to a device and a method for preparing an aluminum-base composite material by using vacuum impregnation and solid-liquid direction extrusion. A smelting furnace is installed on the upper surface of a bottom pallet, the bottom pallet and a mould outer cover are placed on the upper surface of a mould support. A top block is arranged at the bottom of an inner cavity of the smelting furnace. The upper end surface of a top rod is matched with the top block, and the lower end surface of the top rod comes into contact with a piston rod of an ejection cylinder of a four-column hydraulic press. The device accomplishes the four processes of aluminum alloy vacuum smelting, impregnation, extrusion and formation required for preparing the high-performance aluminum-base composite material by using a vacuum furnace, a resistor furnace, the four-column hydraulic press and an extruding and impregnating mould, reduces the defects of shrinkage cavities, shrinkage porosity and cavities of the composite material, increases the density and improves the performance of the aluminum-base composite material, and aluminum-base composite material pieces with different shapes and sizes formed according to the matched degrees of concave dies and convex dies. The device realizes automatic ejection of the aluminum-base composite material through an ejection structure and reduces the formation and processing procedures of parts.

Description

technical field [0001] The invention relates to the field of material forming, in particular to a vacuum impregnation-solid-liquid direct extrusion device and method for preparing aluminum-based composite materials. Background technique [0002] Aluminum matrix composite material has the advantages of low density, high specific strength, high specific modulus, high temperature resistance, wear resistance, small thermal expansion coefficient, good dimensional stability and excellent casting performance. It is a lightweight and high-performance structure Materials are widely used in the fields of aerospace, military defense, automobiles, electronic instruments and other industries. [0003] High vacuum, high volume fraction and high density are the key factors for preparing high-performance aluminum matrix composites. At present, the common preparation methods of aluminum matrix composites include stirring casting method, powder metallurgy method, vacuum pressure infiltration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/12C22C47/04C22C47/06C22C49/06C22C49/14C22C101/10C22C121/02
Inventor 齐乐华马玉钦刘健关俊涛卫新亮李贺军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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