High-strength aluminum-based composite material and preparation method thereof

An aluminum-based composite material, high-strength technology, applied in the direction of nanotechnology, additive manufacturing, and additive processing for materials and surface science, can solve problems such as uneven dispersion, nanoparticle agglomeration, and small particle size, so as to avoid Effect of powder spreading and uniform structure

Active Publication Date: 2022-03-15
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main limitation of this method is that the nanoparticles are agglomerated, unevenly dispersed, and the particle size is small. Under the impact of the laser electron beam, the nanoparticles are easily scattered in the form of soot over the cavity, and then taken away by the air supply system, which leads to Inhomogeneous distribution of matrix components
The second is to use atomization technology in advance to prepare metal-based nanocomposite aluminum alloy powder, and then use laser printing. This method avoids the above problems, but the material development cycle is relatively long

Method used

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  • High-strength aluminum-based composite material and preparation method thereof
  • High-strength aluminum-based composite material and preparation method thereof
  • High-strength aluminum-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] The AlMgScZr aluminum alloy powder with nano-network microporous structure on the surface was prepared by plasma spheroidization method. The process parameters were: powder feeding rate 10g / min, reactor pressure 6pa, protective gas mixed gas of argon and nitrogen, nitrogen ratio of 0.07 %, the carrier gas flow rate is 5slpm, and the power is 11Kw; the powder is spherical in shape, and the particle size distribution is 1-53 microns. figure 1 and figure 2 It can be seen that the surface of the powder presents a nano-network structure, the surface pore size is 100±20nm, and the pore depth is 80±10nm; this process parameter can prepare high-quality AlMgScZr aluminum alloy powder with a nano-network microporous structure on the surface .

Embodiment 2

[0027] Mix the AlMgScZr aluminum alloy powder with a nano-reticular microporous structure on the surface of Example 1 with the TiN nano-reinforced phase, and the particle size is 20-50nm; specifically, mix the TiN nano-reinforced phase and the aluminum alloy powder according to the mass ratio of 1 : 500ml of absolute ethanol that is placed together with 99, use a stirrer to mix evenly and fully under an argon environment; then dry it in a 45°C oven; phase; use selective laser melting technology to print aluminum alloy powder with TiN nano-enhanced phase on the surface, the process parameters are: laser power 220W, scanning speed 1200mm / s, scanning distance 0.12mm. The prepared high-strength aluminum-based composite material has a tensile strength of 550Mpa.

Embodiment 3

[0029] The plasma spheroidization method is used to prepare AlSi10Mg aluminum alloy powder with nano-network microporous structure on the surface. The process parameters are: powder feeding rate 20g / min, reactor pressure 8pa, protective gas is a mixed gas of argon and nitrogen, and the ratio of nitrogen is 0.09 %, the carrier gas flow rate is 10slpm, and the power is 12Kw; under the process parameters, spherical powder can be prepared with a particle size of 1-53 microns; at the same time, the surface of the powder can also form a nano-network microporous structure with a surface pore size of 200±50 nanometer, and the pore depth is 120±30 nanometers; this process parameter can prepare high-quality AlSi10Mg aluminum alloy powder with a nano-network microporous structure on the surface.

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Abstract

The invention discloses a high-strength aluminum-based composite material and a preparation method thereof.The preparation method comprises the steps that firstly, aluminum alloy powder with the surface provided with a nanometer net-shaped micropore structure is prepared through a plasma spheroidizing method, the powder is spherical and oval in morphology, and the particle size distribution ranges from 1 micrometer to 100 micrometers; aluminum alloy powder is mixed with the nanometer reinforced phase, so that the nanometer particles are adhered into the net-shaped micropores in the surface of the aluminum alloy; and finally, the aluminum alloy powder with the nano reinforced particles adhered to the surface is printed through a 3D printing process, and the high-strength aluminum-based composite material is obtained. The method has the technical advantages that the reinforced nanoparticles are effectively and firmly adsorbed on the surface of the aluminum alloy powder through the nanometer effect, powder diffusion in the printing process is avoided, molten pool fluid regulation and control are facilitated, and the structure is uniform.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum-based materials, and in particular relates to a high-strength aluminum-based composite material and a preparation method thereof. Background technique [0002] Aluminum matrix composites usually refer to metal matrix composites that use pure aluminum or aluminum alloy as the matrix and are compounded by adding nano-reinforcements to obtain significantly enhanced mechanical properties, thermophysical properties, and electrical properties. It is an important new type of composite material. Metal materials, at present, have developed high-strength, corrosion-resistant, damage-tolerant, heat-resistant and other series, and are used in the national grid, aviation, aerospace, electronics and transportation and other fields. At present, the preparation methods of metal matrix nanocomposites mainly include stirring casting method, powder metallurgy, and additive manufacturing method. For the additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/00C22C1/10B22F10/28B22F1/142B22F1/07B22F1/065B33Y10/00B82Y30/00B82Y40/00
CPCC22C1/05C22C21/00B22F10/28B33Y10/00B82Y30/00B82Y40/00Y02P10/25
Inventor 陈云翔夏晓健万芯瑗洪毅成韩纪层严康骅林德源沈谢林郝文魁陈云杨丙坤
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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