Vacuum stirring composite granule reinforcing aluminium-based composite material and preparation technique thereof

A composite particle and vacuum mixing technology, which is applied in the field of composite materials, can solve problems such as uneven distribution, poor wettability between particles and the matrix, and high porosity, and achieve the effect of improving the composite effect, good interface bonding, and low porosity

Active Publication Date: 2008-04-09
GUIZHOU BRANCH CHINA ALUMINUM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a vacuum-stirred composite particle-reinforced aluminum-based composite material and its preparation process, aiming to solve the problem of poor wettability between particles and the matrix, uneven distribution and porosity in the process of stirring and compounding. advanced questions

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  • Vacuum stirring composite granule reinforcing aluminium-based composite material and preparation technique thereof
  • Vacuum stirring composite granule reinforcing aluminium-based composite material and preparation technique thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Material preparation: α-SiC is used as reinforcing particles, aluminum strontium and aluminum rare earth are used as modifiers. Weigh 1.2kg of SiC and 5.5kg of aluminum alloy according to the weight ratio of SiC and aluminum alloy of 1:4.5, the aluminum alloy is ZL108, and the particle size of SiC is W14. 27.5 g of aluminum strontium and 27.5 g of aluminum strontium and 27.5 g of aluminum strontium were weighed with the weight ratio of aluminum strontium, aluminum rare earth and aluminum alloy being 0.1:20.

[0039] Sieve 1.2kg of SiC to remove united particle clusters and other impurities. Put the SiC particles into the pretreatment furnace 1 for roasting pretreatment when the base aluminum alloy is put into the crucible. The temperature is set at 600°C to remove particles. Contaminants such as impurities and adsorbed moisture on the surface.

[0040] Stirring and compounding: the matrix ZL108 aluminum alloy is put into the vacuum resistance furnace 5 for melting, and...

Embodiment 2

[0047] Material preparation: α-SiC is used as reinforcing particles, aluminum strontium and aluminum rare earth are used as modifiers. Weigh 0.343 kg of SiC and 5.5 kg of aluminum alloy according to the weight ratio of SiC and aluminum alloy of 1:16, the aluminum alloy is 6061, and the particle size of SiC is W14.

[0048] Sieve 0.343kg of SiC to remove united particle clusters and other impurities. Put the SiC particles into the pretreatment furnace 1 for roasting pretreatment when the base aluminum alloy is put into the crucible. The temperature is set at 300°C to remove the particles. Contaminants such as impurities and adsorbed moisture on the surface.

[0049] Stirring and compounding: put the base 6061 aluminum alloy into the vacuum resistance furnace 5 for melting, and set the temperature at 730°C. After the alloy is completely melted, slag removal and refining are carried out. After the matrix alloy is smelted and refined, vacuumize to a vacuum degree of 0.005MPa, an...

Embodiment 3

[0056] Material preparation: α-SiC is used as reinforcing particles, aluminum strontium and aluminum rare earth are used as modifiers. 2.07 kg of SiC and 7.1 kg of aluminum alloy were weighed according to the weight ratio of SiC and aluminum alloy of 1:3.4, the aluminum alloy was A356, and the particle size of SiC was W14. 32 g of aluminum strontium and 32 g of aluminum strontium were weighed at a weight ratio of aluminum strontium, aluminum rare earth and aluminum alloy of 0.1:22.

[0057] Sieve 2.07kg of SiC to remove united particle clusters and other impurities. Put the SiC particles into the pretreatment furnace 1 for roasting pretreatment when the base aluminum alloy is put into the crucible. The temperature is set at 800°C to remove the particles. Contaminants such as impurities and adsorbed moisture on the surface.

[0058] Stirring and compounding: the matrix A356 aluminum alloy is put into the vacuum resistance furnace 5 for melting, and the temperature is set at 73...

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Abstract

The invention relates to a composite material of vacuum churning composite granule enhanced aluminum matrix and a preparation technique, which comprises: Si 0-15Wt%, Mg 0-1.5Wt%, Cu 0-2.0Wt%, Mn 0-1.0Wt%, Cr 0-0.4Wt%, Ti 0-0.2Wt%, SiC 0.1-20% (volume proportion). Firstly base alloy is smelted, slag is removed, and refined, churned slowly in vacuum to complete degassing procedure for base melt, the pre-treated enhanced granule is continuously added into the aluminum base melt, mechanical churning to roll the granule into the melt, after the granule is completely rolled in the melt, strong churning and slow churning in reverse direction are conducted so as to disperse the granule evenly in the base; the temperature raises, modifier and refiner are added; the vacuum is dismounted, and placed in static, the floating slag is removed above the melt, and cast. The composition between the granule and the base is realized via vacuum mechanical churning, the joining interface is good, the enhanced granule is evenly dispersed in the base, the prepared composite material has low porosity rate, which is easy to realize industrial mass production.

Description

technical field [0001] The invention relates to a vacuum-stirred composite particle-reinforced aluminum-based composite material and a preparation process thereof, belonging to the technical field of composite materials. Background technique [0002] The development and application of high-tech science and technology promote the development of materials in many aspects such as high specific strength, high specific stiffness, high specific toughness, high temperature resistance, and fatigue resistance. The particle-reinforced aluminum matrix composite material has the synergistic effect of its raw material composition, and it has the advantages of high specific modulus, high specific strength, controllable thermal expansion coefficient, and good high temperature performance, and has a large material design The characteristics of the degree of freedom is one of the most studied and widely used materials in composite materials, and has become an important research direction of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03B22D21/04
Inventor 毛建伟张建平乐永康
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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