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A kind of tin/al-based material composite powder and its laser 3D printing forming method

A composite powder and 3D printing technology, applied in the field of aluminum matrix composite materials, can solve the problems of cumbersome preparation process and destroy the shape of powder, and achieve the effects of simple preparation process, improved absorption capacity, and improved printing performance.

Active Publication Date: 2021-07-16
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the in situ synthesis method is cumbersome, and the ball milling will destroy the powder shape to a certain extent.

Method used

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  • A kind of tin/al-based material composite powder and its laser 3D printing forming method
  • A kind of tin/al-based material composite powder and its laser 3D printing forming method
  • A kind of tin/al-based material composite powder and its laser 3D printing forming method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) The matrix of the composite material is selected as nearly spherical AlSi10Mg powder with a purity of 99.9%, and the particle size of the powder is 15-50 μm. The reinforcing phase is nano-spherical TiN powder with a purity of 99.9%, and its particle size is 10-100nm. The percentages of the two powder mass fractions are: AlSi10Mg 99%, TiN 1%.

[0037] (2) Add the above powders in sequence according to the method of equal increments, that is, first put 1wt% TiN and 1wt% AlSi10Mg powders into an ultrasonic vibrator and vibrate and disperse for 3min, the vibration frequency is 20KHz, and the mode is continuous. Add deoxidizer and desiccant at the same time. Then continue to add 2% AlSi10Mg and mix and disperse with the powder added for the first time, and the time length is 3mim. And so on, until all the powders of the required quality are initially mixed.

[0038] (3) Put the preliminarily mixed composite powder into a V-type mixer and mix for 12 hours.

[0039](4)...

Embodiment 2

[0043] (1) The matrix of the composite material is selected as nearly spherical AlSi10Mg powder with a purity of 99.9%, and the particle size of the powder is 15-50 μm. The reinforcing phase is nano-spherical TiN powder with a purity of 99.9%, and its particle size is 10-100nm. Wherein the percentage of powder mass fraction is: AlSi10Mg 98%, TiN 2%.

[0044] (2) Add the above powders in sequence according to the method of equal increments, that is, first put 2wt% TiN and 2wt% AlSi10Mg powders into an ultrasonic vibrator to vibrate and disperse for 5min, the vibration frequency is 30KHz, and the mode is continuous. Add deoxidizer and desiccant at the same time. Then continue to add 4% AlSi10Mg and mix with the powder added for the first time, and the time length is 5mim. And so on, until all the powders of the required quality are initially mixed.

[0045] (3) Put the preliminarily mixed composite powder into a V-type mixer and mix for 10 hours.

[0046] (4) Take out the mi...

Embodiment 3

[0054] (1) The matrix of the composite material is selected as nearly spherical AlSi10Mg powder with a purity of 99.9%, and the particle size of the powder is 15-50 μm. The reinforcing phase is nano-spherical TiN powder with a purity of 99.9%, and its particle size is 10-100nm. The percentage of powder mass fraction is: AlSi10Mg 90% TiN 10%.

[0055] (2) Add the above powders in sequence according to the method of equal increments, that is, first put 10wt% TiN and 10wt% AlSi10Mg powders into an ultrasonic vibrator to vibrate and disperse for 5min, the vibration frequency is 25KHz, and the mode is pulse. Add deoxidizer and desiccant at the same time. Then continue to add 20% AlSi10Mg and mix with the powder added for the first time, and the time length is 5mim. And so on, until all the powders of the required quality are initially mixed.

[0056] (3) Put the preliminarily mixed composite powder into a V-type mixer and mix for 15 hours.

[0057] (4) Take out the mixed compos...

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Abstract

The invention belongs to the field of aluminum-based composite materials, and discloses a TiN / Al-based material composite powder and a laser 3D printing forming method thereof. The composite powder includes matrix powder and reinforcement phase particles, the matrix powder is AlSi10Mg powder, the reinforcement phase particles are nano-TiN ceramic particles, and the nano-TiN ceramic particles are evenly distributed on the surface of the AlSi10Mg powder, the mass fraction of matrix powder and reinforcement phase particles They are: AlSi10Mg 90% to 99%, TiN 1% to 10%. In the present invention, nano-TiN ceramic particles are used as a reinforcing phase to coat the surface of Al-based powder, the laser absorption rate of the composite powder is improved, and the printing formability at low power is improved, thereby reducing production costs. And the reinforcement phase still maintains the nanostructure after laser processing, resulting in fine-grain strengthening and improving the hardness and tensile strength of the material.

Description

technical field [0001] The invention belongs to the field of aluminum-based composite materials, and in particular relates to a TiN / Al-based material composite powder and a laser 3D printing forming method thereof. Background technique [0002] In recent years, particle reinforced aluminum matrix composites have attracted widespread attention due to their excellent comprehensive mechanical properties such as low density, high specific strength and specific stiffness, high elastic modulus, high wear resistance, high thermal conductivity and low thermal expansion coefficient. focus on. Studies have shown that the particle size of the reinforcing phase reaches nanoscale can effectively improve the mechanical properties of metal matrix composites. In order to obtain nanocomposites with ideal properties, nanoparticles as reinforcements must be uniformly distributed in the matrix material. However, since nanoparticles generally have a large specific surface area, which increases...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F10/28C22C21/02C22C32/00B33Y70/10B33Y10/00
CPCB22F1/0003C22C21/02C22C32/0068B33Y10/00B33Y70/00B22F2999/00B22F10/00B22F10/34B22F12/17B22F10/36B22F12/52B22F10/28B22F10/366B22F2202/01Y02P10/25
Inventor 肖志瑜高超峰柳中强王震吴苑标陈进
Owner SOUTH CHINA UNIV OF TECH
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