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Device and method for preparing spherical metal powder for 3D printing

A metal powder, 3D printing technology, applied in the field of spherical metal powder preparation, can solve the problems of poor sphericity, poor spreading and fluidity, etc., and achieve the effects of high production efficiency, narrow particle size distribution range and strong controllability

Inactive Publication Date: 2018-12-18
DALIAN UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the above-mentioned problems such as poor sphericity, poor spreadability and fluidity in the preparation process of metal powder for 3D printing, a device and method for preparing spherical metal powder for 3D printing are provided.

Method used

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  • Device and method for preparing spherical metal powder for 3D printing
  • Device and method for preparing spherical metal powder for 3D printing
  • Device and method for preparing spherical metal powder for 3D printing

Examples

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Embodiment 1

[0070] Prepare copper metal powder for 3D printing with the above-mentioned device and method, and the specific implementation method is as follows:

[0071] First, the copper block is broken into block particles with a particle diameter of 2 cm, and put into a crucible 5 with a central hole at the bottom. Graphite bolts with small holes (i.e. pads 20 with small holes) are installed to the bottom of the crucible 5 through four evenly distributed screws 7, and the furnace door 8 is closed; the crucible chamber 25, the housing 19 and the The collection chamber 13 is evacuated to a low vacuum of 1Pa-5Pa, then the diffusion pump 23 is used to evacuate to a high vacuum of 10-3Pa, and then filled with high-purity inert gas argon to atmospheric pressure; the power is set to be energized to the resistance heater 6, and the temperature reaches the melting point of copper Then continue to heat up to overheating 10°C and keep warm for 30 minutes to melt all the copper particles in the cr...

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Abstract

The invention provides a device and method for preparing spherical metal powder for 3D printing. The device for preparing the spherical metal powder comprises a shell, a crucible and a collecting bin,wherein the crucible is arranged in the shell, and the collecting bin is arranged on the lower portion of the shell. The device for preparing the spherical metal powder for the 3D printing is characterized in that a rotating disc arranged in a powder collection area is of a inlaying structure, materials with poor thermal conductance are selected as a substrate part of the rotating disc, metal materials with a wetting angle less than 90 degrees with liquid drops are selected to be inlayed into a main part to be used as an atomized plane, and a ventilation hole is formed in the rotating disc. The invention further discloses a method for preparing the spherical metal powder for the 3D printing, a pulse microporous injection method and a centrifugal atomization method are mainly combined, a rotating disc structure is matched, and the surface of the rotating disc is subjected to induction heating, so that molten metal breaks through a split mode of traditional molten metal, a fibrous splitmode which can be realized only when an atomization medium is an aqueous solution or an organic solution is realized, high melting point metal powder which meets requirements is prepared, the particle size is fine and grain size is controllable, the sphericity is high, no satellite droplet is achieved, the mobility and the spreadability are good, and the preparation method is suitable for industrialized production.

Description

technical field [0001] The present invention belongs to the technical field of spherical metal powder preparation, and in particular relates to a device for preparing spherical high-melting-point metal powder for 3D printing through the fibrous splitting mode of molten metal by combining the pulse microporous injection method and the centrifugal atomization method and methods. Background technique [0002] 3D printing technology is a rapid prototyping technology based on digital model files, using bondable materials such as metal powder or plastic, to construct objects by layer-by-layer printing. It has important application and development prospects in equipment construction. The demand for spherical metal powders for 3D printing is also increasing, and high requirements are placed on the quality of powders, especially high melting point alloy metal powders. 3D printing technology requires metal powders to meet low oxygen content. , high sphericity, narrow particle size d...

Claims

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Application Information

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IPC IPC(8): B22F9/10
CPCB22F9/10
Inventor 董伟王延洋朱胜王晓明赵阳孟瑶许富民白兆丰韩阳李国斌石晶韩国峰王思捷常青任志强滕涛
Owner DALIAN UNIV OF TECH
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