A kind of high-strength aluminum matrix composite material and preparation method thereof

An aluminum-based composite material, high-strength technology, applied in nanotechnology, additive manufacturing, and additive processing for materials and surface science, can solve problems such as uneven dispersion, nanoparticle agglomeration, and long material development cycle, and achieve The effect of avoiding powder spreading and uniform organization

Active Publication Date: 2022-08-05
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of high-strength aluminum matrix composite material and preparation method thereof
  • A kind of high-strength aluminum matrix composite material and preparation method thereof
  • A kind of high-strength aluminum matrix composite material and preparation method thereof

Examples

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. The process parameters were: powder feeding rate 10g / min, reactor pressure 6pa, protective gas was a mixture of argon and nitrogen, and the nitrogen ratio was 0.07 %, the carrier gas flow rate is 5slpm, and the power is 11Kw; the powder is spherical in morphology, 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 nano-network microporous structure on the surface .

Embodiment 2

[0027] The AlMgScZr aluminum alloy powder with nano-network microporous structure on the surface of Example 1 is mixed with the TiN nano-enhanced phase, and the particle size is 20-50 nm; specifically, the TiN nano-enhanced phase and the aluminum alloy powder are in a mass ratio of 1 :99 500ml of absolute ethanol placed together, stir and mix uniformly and fully with a stirrer in an argon environment; then dry in an oven at 45 °C; after drying, use a filter screen to remove the nano-enhancing that does not adhere to the surface of the aluminum alloy powder. The aluminum alloy powder with TiN nano-enhanced phase adhered to the surface is printed by selective laser melting technology. The process parameters are: laser power 220W, scanning speed 1200mm / s, and scanning spacing 0.12mm. The prepared high-strength aluminum-based composite material has a tensile strength of 550Mpa.

Embodiment 3

[0029] The AlSi10Mg aluminum alloy powder with nano-network microporous structure on the surface was prepared by plasma spheroidization. The process parameters are: powder feeding rate 20g / min, reactor pressure 8pa, protective gas is a mixture of argon and nitrogen, and the nitrogen ratio is 0.09 %, the carrier gas flow is 10slpm, and the power is 12Kw; spherical powder can be prepared under the process parameters, with a particle size of 1-53 microns; at the same time, the surface of the powder can also form a morphology with a nano-network microporous structure, and the surface pore size is 200±50 nanometer, and the hole depth is 120±30 nanometers; this process parameter can prepare high-quality AlSi10Mg aluminum alloy powder with 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. Firstly, a plasma spheroidization method is used to prepare an aluminum alloy powder with a nano-network microporous structure on the surface. is 1-100 microns; the aluminum alloy powder is mixed with the nano-enhanced phase, so that the nanoparticles adhere to the meshed micropores on the surface of the aluminum alloy; finally, the 3D printing process is used to print the aluminum alloy powder with the nano-enhanced particles adhered to the surface, Obtain high-strength aluminum matrix composites. The technical advantage is that the method effectively adsorbs the enhanced nanoparticles on the surface of the aluminum alloy powder through the nano-effect, avoids powder diffusion during the printing process, and helps to regulate the fluid in the molten pool and achieve a uniform structure.

Description

technical field [0001] The invention belongs to the field of aluminum-based material preparation, and particularly relates to a high-strength aluminum-based composite material and a preparation method thereof. Background technique [0002] Aluminum-based composite materials usually refer to metal-based composite materials with pure aluminum or aluminum alloy as the matrix and compounded by external nano-reinforcements to obtain significantly enhanced mechanical properties, thermophysical properties and electrical properties, etc. 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 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(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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