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Equipment for improving particle distribution of in-situ particle reinforced aluminum matrix composite and application

A particle-reinforced aluminum and composite material technology, applied in the field of materials, can solve problems such as a large number of particles and agglomeration, and achieve the effects of low cost, simple equipment and large cumulative deformation

Active Publication Date: 2017-02-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device for improving the particle distribution uniformity of in-situ particle-reinforced aluminum-based composite materials and its application method in order to overcome the defects of the above-mentioned prior art, effectively breaking up the agglomerates of in-situ particles during the casting process, The process is simple and easy to operate, low cost and high efficiency, and can generate large-sized samples, which solves the technical problem of a large number of particle agglomerations in the in-situ particle reinforced aluminum matrix composite

Method used

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  • Equipment for improving particle distribution of in-situ particle reinforced aluminum matrix composite and application

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Experimental program
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Effect test

Embodiment 1

[0027] In situ self-generated 5wt.%TiB obtained by casting 2 / 7050Al composite material, a large amount of TiB in the as-cast structure 2 Particles agglomerate at grain boundaries. In situ self-generated 5wt.%TiB obtained by casting 2 / 7050Al composite material was homogenized at 465°C for 24 hours, and then subjected to two-pass orthogonal lamination extrusion at 450°C. After extrusion, the in-situ particle agglomeration at the grain boundary of the matrix aluminum alloy in the composite Body is broken up, TiB 2 The particles are uniformly distributed in the matrix alloy. 5wt.%TiB after two passes of orthogonal extrusion 2 The / 7050Al composite was solid-soluted at 470°C for 70min and aged at 120°C for 20h, then its mechanical properties were characterized, and it had a plasticity of more than 10%, indicating that the in-situ 5wt.%TiB 2 The particle aggregates in the matrix structure of / 7050Al composites were completely broken up.

Embodiment 2

[0029] In situ self-generated 5wt.%TiB obtained by casting 2 / 2024Al composite material, there is a large amount of TiB in the as-cast structure 2 Particles agglomerate at grain boundaries. In situ self-generated 5wt.%TiB obtained by casting 2 / 2024Al composites were homogenized at 490°C for 48 hours, and then four passes of orthogonal lamination extrusion was carried out at 450°C. Body is broken up, TiB 2 The particles are evenly distributed in the matrix alloy, and 5wt.% TiB is self-generated in situ 2 The uniformity of particle distribution within the / 2024Al composite is improved.

Embodiment 3

[0031] Devices for improving particle distribution of in-situ particle-reinforced aluminum matrix composites with structures such as figure 1As shown, it includes an upper pressure head 1, a mold cylinder 2 and a mold head 3. The middle part of the mold cylinder 2 is provided with a through hole with a square structure in cross section, and the side length is d. The upper pressure head 1 and the mold head 3 are connected to the through hole. When in use, the composite material is placed in the through hole, and the upper pressure head and the die head are respectively placed on the upper and lower surfaces of the composite material and pressed tightly. The die head 3 is also provided with a pit, and the bottom of the pit is provided with a through hole communicating with the bottom.

[0032] To improve the application of in-situ particle-reinforced aluminum matrix composite particle distribution equipment, the following steps are taken:

[0033] (1) The particle-reinforced al...

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Abstract

The invention relates to equipment for improving particle distribution of an in-situ particle reinforced aluminum matrix composite and application. The equipment comprises an upper pressing head (1), a mold barrel (2) and a mold head (3), wherein a through hole is formed in the middle of the mold barrel (2), the upper pressing head (1) and the mold head (3) are matched with the through hole in shape, and when the equipment is used, the composite is arranged in the through hole, and the upper pressing head (1) and the mold head (3) are arranged on the upper surface and the lower surface of the composite correspondingly in a pressing mode. Compared with the prior art, the in-situ particle reinforced aluminum matrix composite is extruded and deformed in a multi-pass orthogonal lamination extrusion mold, large accumulative shearing strain can be exerted on the in-situ particle reinforced aluminum matrix composite, and therefore a mechanical stirring effect is achieved to scatter in-situ synthesis particle aggregates in the composite and enable the in-situ synthesis particle aggregates to be evenly dispersed in an aluminum matrix, and the particle distribution uniformity of the in-situ particle reinforced aluminum matrix composite is improved.

Description

technical field [0001] The invention relates to the field of materials, in particular to a device and application for improving particle distribution uniformity of in-situ particle-reinforced aluminum-based composite materials. Background technique [0002] With the development of modern science and technology, the requirements for material properties in practical applications have become more stringent. Especially in high-tech fields such as aerospace and weapon manufacturing, structural materials should have high specific stiffness and specific modulus while requiring high strength and high plasticity. However, traditional metal materials are difficult to meet such complex performance requirements. For example, although traditional steel materials have good strength and plasticity, their density is too high, so they are not suitable for a large number of applications in aerospace and other fields that have high requirements for specific strength of components; while titan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10
CPCC22C1/1036C22C1/1073
Inventor 刘钧陈哲汪明亮吴一陈东钟圣怡王浩伟
Owner SHANGHAI JIAO TONG UNIV
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