Isotropical high-strength high-toughness particle reinforced aluminium-based composite material and preparation method thereof

A particle-reinforced aluminum, high-strength and high-toughness technology is applied in the field of isotropic, high-strength and high-toughness particle-reinforced aluminum-matrix composite material preparation. Differences in physical properties, etc., to achieve the effect of shortening production cycle, improving strength and plasticity, and low ball-to-material ratio

Inactive Publication Date: 2014-06-18
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
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Problems solved by technology

Although the strength and plasticity of particle-reinforced aluminum matrix composites can be significantly improved by traditional plastic deformation methods, such as extrusion, forging and rolling, but at the same time it will also increase the anisotropy inside the material, such as: along the extrusion The mechanical properties of the pressing direction are obviously higher than those perpendicular to the extrusion direction, and the physical properties of the two directions will also have certain differenc

Method used

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  • Isotropical high-strength high-toughness particle reinforced aluminium-based composite material and preparation method thereof
  • Isotropical high-strength high-toughness particle reinforced aluminium-based composite material and preparation method thereof
  • Isotropical high-strength high-toughness particle reinforced aluminium-based composite material and preparation method thereof

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Experimental program
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Embodiment 1

[0039] The experimental material of this embodiment is 15vol.% SiC prepared by powder metallurgy p / 2009Al composite material, the average particle size of SiC particles is 10 μm, the volume percentage is 15%, and the average particle size of 2009Al alloy powder is 40 μm.

[0040] The preparation method is to weigh 13.18kg of SiC powder, 56.82kg of 2009Al alloy powder and 70kg of Ф10mm steel ball according to the volume fraction content of reinforcement particles in the designed composite material of 15% and the ball-to-material ratio of 1:1. In the feeder, mix for 24 hours, and the speed of the mixer is 30rpm. The composite powder obtained above was vacuum hot-pressed into a Ф300mm cylindrical billet A1#, the hot-pressing temperature was 620°C, and the vacuum degree was 2×10 -3 Pa, the pressure is 80MPa. The hot-pressed ingot of the composite material obtained above was hot-extruded into a Ф80mm bar A2#, the extrusion temperature was 420°C, the extrusion ratio was 14:1, and...

Embodiment 2

[0042] The experimental material of this embodiment is 25vol.%SiC prepared by powder metallurgy p / 2009Al composite material, the average particle size of SiC particles is 6 μm, the volume percentage is 25%, and the average particle size of 2009Al alloy powder is 30 μm.

[0043] The preparation method is to weigh 19.51kg of SiC powder, 50.49kg of 2009Al alloy powder and 70kg of Ф10mm steel ball according to the volume fraction content of reinforcement particles in the designed composite material of 25% and the ball-to-material ratio of 1:1. In the feeder, mix for 24 hours, and the speed of the mixer is 30rpm. The composite powder obtained above was vacuum hot-pressed into a Ф300mm cylindrical billet B1#, the hot-pressing temperature was 620°C, and the vacuum degree was 2×10 -3 Pa, the pressure is 80MPa. The hot-pressed ingot of the composite material prepared above was hot-extruded into a Ф80mm bar B2#, the extrusion temperature was 450°C, the extrusion ratio was 14:1, and t...

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Abstract

The invention relates to isotropical high-strength high-toughness particle reinforced aluminium-based composite material and a preparation method thereof. In the composite material, the granularity of reinforced particles is 1-25 mu m, the volume percentage is 5%-30%, the reinforced particles are dispersed and distributed in a substrate in the aspect of space, and the reinforced particles and the substrate form high-strength interface combination. The preparation method comprises adding the reinforced particles and aluminium alloy powder into a material mixing barrel for mechanical mixing, so as to obtain a composite material, then performing vacuum hot pressing on the composite material to form preform bodies, and successively performing extrusion, forging and rolling on the preform bodies for deformation. The prepared composite material can be used as bearing members with complex stress in the aerospace field. The product is characterized in that the material has excellent properties such as isotropical property, high strength, high toughness and the like, and is stable in quality, low in cost, easy for large-scale industrial production, and the like.

Description

technical field [0001] The invention belongs to the technical field of particle-reinforced aluminum-based composite materials; in particular, it relates to a preparation method for particle-reinforced aluminum-based composite materials with isotropy and high strength and toughness. Background technique [0002] Compared with the matrix alloy, the particle-reinforced aluminum matrix composite has excellent comprehensive properties such as high specific strength, high specific stiffness, small thermal expansion coefficient, and good thermal conductivity. It has begun and gradually been widely used in the aerospace field. Since the 1980s, my country has invested a lot of manpower and material resources in the research and application development of this type of composite materials, trying to use lightweight particle-reinforced aluminum-based composite materials as structural materials in important applications such as aerospace. To replace the traditional aluminum alloy and tita...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05C22C1/10
Inventor 魏少华刘彦强左涛马自力樊建中
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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