A kind of aluminum-based nanocomposite material based on slm forming and its preparation method

A nanocomposite material and nanocomposite technology, applied in the field of SLM-based aluminum-based nanocomposite material and its preparation, can solve problems such as uneven distribution of reinforced particles, poor wettability, mismatch between process performance and mechanical properties, and achieve The effect of narrow particle size distribution, uniform sphericity, and simple preparation method

Active Publication Date: 2017-07-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned existing technical problems, the present invention provides an aluminum-based nanocomposite material formed based on SLM, which can be used in the field of laser additive technology, and effectively solves the problem of the technological performance of aluminum-based nanocomposites in the laser additive process. The problems of mismatched mechanical properties, uneven distribution of reinforcing particles, and poor wettability between the ceramic phase and the substrate phase make the obtained products have good interfacial bonding and excellent mechanical properties

Method used

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  • A kind of aluminum-based nanocomposite material based on slm forming and its preparation method
  • A kind of aluminum-based nanocomposite material based on slm forming and its preparation method
  • A kind of aluminum-based nanocomposite material based on slm forming and its preparation method

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Embodiment 1

[0057] The present invention is an aluminum-based nanocomposite material formed based on SLM. The preparation process of the aluminum-based nanocomposite material includes two stages of mechanical high-energy ball milling to prepare aluminum-based nanocomposite powder and SLM forming and curing of aluminum-based nanocomposite powder:

[0058] 1. Preparation of aluminum-based nanocomposite powder by mechanical high-energy ball milling

[0059] The rare earth phase Y (content is 0.3wt%, average particle size is 10 μm) and aluminum matrix phase powder (wherein the content of silicon component is 7.8wt%, and average particle size is 15 μm) powder is mixed, and mixed powder a is obtained; The mixed powder a is placed in a ball mill, and the ball milling tank is continuously evacuated and the residual air is exhausted with argon, and then argon is introduced into the tank, and the air pressure is controlled at 0.5Mpa; the mixed powder a is intermittently ball milled, and the ball mil...

Embodiment 2

[0072] The present invention is an aluminum-based nanocomposite material formed based on SLM. The preparation process of the aluminum-based nanocomposite material includes two stages of mechanical high-energy ball milling to prepare aluminum-based nanocomposite powder and SLM forming and curing of aluminum-based nanocomposite powder:

[0073] 1. Preparation of aluminum-based nanocomposite powder by mechanical high-energy ball milling

[0074] Rare earth phase La (content is 0.5wt%, average particle size is 15um) and aluminum matrix phase (wherein silicon component content is 9wt%, average particle size is 30μm) powder is carried out proportioning mixing, obtains mixed powder a; Mixed powder a is placed in a ball mill, vacuumize the ball mill tank continuously and exhaust the residual air with argon gas, then feed argon gas into the tank, and the air pressure is controlled at 0.5Mpa; perform intermittent ball milling on the mixed powder a, and the ball milling speed is 350r / mi...

Embodiment 3

[0085] The present invention is an aluminum-based nanocomposite material formed based on SLM. The preparation process of the aluminum-based nanocomposite material includes two stages of mechanical high-energy ball milling to prepare aluminum-based nanocomposite powder and SLM forming and curing of aluminum-based nanocomposite powder:

[0086] 1. Preparation of aluminum-based nanocomposite powder by mechanical high-energy ball milling

[0087] Rare earth phase Sm (content is 0.8wt%, average particle size is 12um) and aluminum matrix phase powder (wherein silicon component content is 6.8wt%, average particle size is 20μm) carry out proportioning mixing, obtain mixed powder a; Mix Powder a is placed in a ball mill, the ball mill tank is continuously evacuated and the residual air is exhausted with argon, and then argon is introduced into the tank, and the air pressure is controlled at 0.5Mpa; the mixed powder a is intermittently ball milled, and the ball milling speed is 300r / min...

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Abstract

The invention belongs to the field of aluminum-based nanocomposite materials, and specifically relates to an aluminum-based nanocomposite material formed based on SLM and a preparation method thereof. The aluminum-based nanocomposite material is obtained by forming aluminum-based nanocomposite powder through SLM; The aluminum-based nanocomposite powder includes a ceramic phase, a rare earth phase and an aluminum matrix phase; the SLM forming process parameters are: the laser power is between 100W, 120W and 130W or 100-130W, the scanning distance is 30 µm and the powder layer thickness is 50 µm; the effective bulk energy density is controlled at 288‑398.65 J/mm3. Effectively solve the problems of mismatching process performance and mechanical properties, uneven distribution of reinforcement particles and poor wettability between ceramic phase and substrate phase in the laser additive process of aluminum-based nanocomposites, so that the obtained products have Good interfacial bonding and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of aluminum-based nanocomposites, in particular to an aluminum-based nanocomposite formed based on SLM and a preparation method thereof. [0002] technical background [0003] With the increasing demand for high-performance lightweight alloy materials, especially in aerospace, automotive, medical and other fields, more and more researchers are paying attention to the design and preparation of novel metal matrix composites. . The traditional aluminum-silicon alloy has attracted widespread attention due to its significant advantages in specific strength, wear resistance and thermal expansion coefficient, but its performance can no longer meet the existing needs. The aluminum-silicon-based composite material obtained by particle reinforcement can significantly improve the mechanical properties of the traditional aluminum-silicon alloy, which has been widely studied and applied in practical engineering. The commonly used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C32/00B22F9/04B22F1/00B22F3/105B33Y10/00B33Y70/00
CPCB22F1/0003C22C21/02C22C32/0052C22C32/0063B22F9/04B22F10/00B22F10/32B22F10/28B22F10/36B22F10/366Y02P10/25
Inventor 顾冬冬马成龙戴冬华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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