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A method for preparing high-strength and high-plasticity aluminum matrix composite material

An aluminum-based composite material and composite material technology, applied in the field of preparing high-strength and high-plastic aluminum-based composite materials, can solve the problems of incompatibility of strength and plasticity, low cost, etc., to achieve strength and plasticity improvement, and refine grain structure Effect

Active Publication Date: 2018-06-26
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the strength and plasticity of the particle-reinforced aluminum-matrix composite cannot be obtained at the same time, the present invention proposes a method for in-situ production of micro-nano particle-reinforced aluminum-matrix composite material, combined with large plastic deformation modification, to prepare a At the same time, it has high strength and high plasticity aluminum matrix composite material, and the process is simple and easy to operate, low cost and high efficiency, and can generate large size samples

Method used

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  • A method for preparing high-strength and high-plasticity aluminum matrix composite material

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Experimental program
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Effect test

Embodiment 1

[0033] Experiments were carried out with high-purity Al, industrial pure Mg, industrial pure Zn, Al-50Cu, Al-12Zr master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB was formulated for the raw material 2 Reinforced Al-6.7Zn-2.2Mg-2.3Cu-0.1Zr alloy composites. Put high-purity Al into the crucible to melt and heat up to 780°C, and cover it with JZF-03 high-temperature covering agent; put KBF 4 、K 2 TiF 6 After mixing evenly according to the mass ratio of 1:2, add it to the melt obtained in step (1) after drying; after the reaction is completed, take out the reaction by-products, and add Al-50Cu, Al-12Zr master alloy and industrial pure Mg in sequence and industrial pure Zn, adding JZJ type harmless aluminum alloy refining agent to the melt for degassing refining, standing at 750°C for 15min, and then pouring into a mold at 730°C to form a slab. 5wt.%TiB obtained by casting 2 Reinforced Al-6.7Zn-2.2Mg-2.3Cu-0.1Zr alloy composites were homogenized for alloy el...

Embodiment 2

[0035] Experiments were carried out with high-purity Al, industrial pure Mg, industrial pure Zn, Al-50Cu, Al-12Zr master alloy, KBF 4 and K 2 TiF 6 In situ self-generated 5wt.%TiB was formulated for the raw material 2 Reinforced Al-6.6Zn-2.2Mg-2.2Cu-0.09Zr alloy composites. Put high-purity Al into the crucible to melt and heat up to 780°C, and cover it with JZF-03 high-temperature covering agent; put KBF 4 、K 2 TiF 6 After mixing evenly according to the mass ratio of 1:2, add it to the melt obtained in step (1) after drying; after the reaction is completed, take out the reaction by-products, and add Al-50Cu, Al-12Zr master alloy and industrial pure Mg in sequence and industrial pure Zn, adding JZJ type harmless aluminum alloy refining agent to the melt for degassing refining, standing at 750°C for 15min, and then pouring into a mold at 730°C to form a slab. 5wt.%TiB obtained by casting 2 Reinforced Al-6.7Zn-2.2Mg-2.3Cu-0.1Zr alloy composites were homogenized for alloy e...

Embodiment 3

[0037] A method for preparing high-strength and high-plasticity aluminum matrix composites, through the method of in-situ self-generated melt control, to prepare as-cast TiB 2 Particle-reinforced Al-8Zn-2.5Mg-2Cu-0.2Zr alloy composite material, and then use the self-designed orthogonal lamination extrusion equipment to realize the in-situ self-generated TiB 2 Multi-pass orthogonal lamination extrusion of particle-reinforced Al-8Zn-2.5Mg-2Cu-0.2Zr alloy composites with large plastic deformation to obtain uniformly dispersed micro-nano TiB 2 Particles and fine equiaxed matrix grain structure, combined with T6 heat treatment of Al-8Zn-2.5Mg-2Cu-0.2Zr alloy, prepared TiB with high strength and high plasticity 2 Particle reinforced Al-8Zn-2.5Mg-2Cu-0.2Zr alloy composites.

[0038] The structure of the cross lamination extrusion equipment used is as follows figure 1 As shown, it includes an upper pressing head 1, a mold cylinder 2 and a mold head 3. The middle part of the mold cyl...

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Abstract

The present invention involves a method for preparing high -strength and high -plastic aluminum -based composite materials.The method of self -control controls the original TIB2 micr -nano particles enhanced Al‑zn‑mg‑cu alloy composite material. Each squeezing deformation direction is perpendicular to the previous squeezing direction and squeezed in multiple positive overlapping pieces.Squeezing and deformation in the mold equipment can apply a large amount of cumulative shear and strain to the granular reinforcement aluminum -based composite material, which will then play a mechanical stirring.The granules are evenly distributed in the aluminum base, and the Al‑zn -mg‑cu substrate grains tissue that can also refine the composite material can also be refined to obtain a shaft crystal of uniform and small.The aluminum -based composite materials prepared by the present invention can have high strength and high plasticity at the same time.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing a high-strength and high-plasticity aluminum-based composite material. 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 titanium alloys, although hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C21/10C22C32/00C22F1/053
CPCC22C1/1036C22C21/10C22C32/0073C22F1/053C22C1/1052
Inventor 刘钧陈哲汪明亮吴一陈东钟圣怡王浩伟
Owner SHANGHAI JIAOTONG UNIV
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