TiN/Al-based material composite powder and laser 3D printing forming method thereof

A composite powder and 3D printing technology, applied in the field of aluminum matrix composite materials, can solve the problems of destroying the shape of the powder and the cumbersome preparation process, and achieve the effects of increasing the number of reflections, simplifying the preparation process and reducing the production cost.

Active Publication Date: 2019-02-12
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 cumbers

Method used

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  • TiN/Al-based material composite powder and laser 3D printing forming method thereof
  • TiN/Al-based material composite powder and laser 3D printing forming method thereof
  • TiN/Al-based material composite powder and laser 3D printing forming method thereof

Examples

Experimental program
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Example Embodiment

[0035] Example 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...

Example Embodiment

[0042] Example 2

[0043] (1) The matrix of the composite material is selected as a near-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 a particle size of 10-100 nm. The percentage of powder mass fraction is: AlSi10Mg 98%, TiN 2%.

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

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

[0046] (4) Tak...

Example Embodiment

[0053] Example 3

[0054] (1) The matrix of the composite material is selected as a near-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 a particle size of 10-100 nm. The percentage of powder mass fraction is: AlSi10Mg 90% TiN 10%.

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

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

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

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Abstract

The invention belongs to the field of aluminum-based composite materials, and discloses TiN/Al-based material composite powder and a laser 3D printing forming method thereof. The composite powder comprises matrix powder and reinforced phase particles, the matrix powder is AlSi10Mg powder, the reinforced phase particles are nano TiN ceramic particles, the nano TiN ceramic particles are evenly distributed on the surface of the AlSi10Mg powder, the mass fraction of the matrix powder, namely the AlSi10Mg powder is 90%-99%, and the mass fraction of the reinforced phase particles, namely the TiN particles is 1%-10%. The nano TiN ceramic particles are adopted as reinforced phases, the surface of the Al-based powder is coated with the nano TiN ceramic particles, the laser absorption rate of the composite powder is increased, the printing forming performance at low power is improved, and therefore the production cost is reduced. The reinforced phases still keep nano structures after laser processing, refined crystalline strengthening is generated, and the hardness and tensile strength of the material are improved.

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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IPC IPC(8): B22F1/00B22F3/105C22C21/02C22C32/00B33Y70/00B33Y10/00
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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