Method and device for preparation of superfine spherical metal powder on basis of uniform droplet spray method

A technology of droplet spraying and metal powder, which is applied in the field of spherical microparticle preparation, can solve the problems of poor spreadability, fluidity, and poor sphericity, and achieve the effect of controllable particle size, uniform size, and strong controllability

Inactive Publication Date: 2015-04-29
DALIAN UNIV OF TECH +1
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Problems solved by technology

[0004] According to the above-mentioned problems such as poor sphericity, poor spreadability and fluidity in the preparation process of metal spherical powder for 3D printing, a device and method for preparing ultrafine spherical metal powder based on uniform droplet spraying method are provided.

Method used

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  • Method and device for preparation of superfine spherical metal powder on basis of uniform droplet spray method

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Experimental program
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Effect test

Embodiment 1

[0042] Specific implementation of batch preparation of Sn63-Pb37 spherical powder for 3D printing:

[0043] Break the Sn63-Pb37 raw material into small pieces, put them into the crucible 3 after ultrasonic vibration, and select the size of the small hole diameter of the nozzle 5 according to the requirements, such as preparing 25 μm-50 μm particles, select the aperture of 0.02mm-1.0mm, such as To prepare 50μm-100μm particles, select a pore size of 1.0mm-2.0mm; the amount of Sn63-Pb37 raw materials should reach 1 / 2-3 / 4 of the crucible 1, such as figure 1 shown;

[0044] Use the mechanical pump 9 to pump the housing 12 and the crucible 3 to a low vacuum of 5 Pa, and then use the diffusion pump 10 to pump the housing 12 and the crucible 3 to a high vacuum of 0.001 Pa; The inert gas argon makes the pressure in the shell 12 and the crucible 3 reach 0.1 MPa;

[0045] Use the induction heater 13 to heat the crucible 3 at a heating temperature of 260° C. to melt the metal material i...

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Abstract

The invention discloses a device for preparation of superfine spherical metal powder on the basis of a uniform droplet spray method. The device comprises a shell, a crucible and a powder collection area, and the crucible and the powder collection area are arranged in the shell. The device is characterized in that a thermocouple is arranged in the crucible, sensing heaters are arranged outside the crucible, and a nozzle with small holes is arranged at the bottom of the crucible; the powder collection area comprises a collection plate and a rotary circular plate, the collection plate is arranged at the bottom of the shell, and the rotary circular plate is connected with a motor and arranged above the collection plate. The invention further discloses a method for preparation of the superfine spherical metal powder. The method for preparation of the superfine spherical metal powder is mainly combined with the uniform droplet spray method and a centrifugal atomization method to prepare metal power narrow in particle size distribution interval, high in sphericity, excellent in liquidity and spreadability, controllable in size, free of satellite droplets and accordant with the utilization requirement on 3D (three-dimensional) printing.

Description

technical field [0001] The invention belongs to the technical field of preparation of spherical microparticles, and in particular relates to a device and method for preparing ultrafine spherical metal powder by combining a droplet spraying method and a centrifugal atomization method. Background technique [0002] With the development and transformation of processing technology, spherical powder materials are widely used in electronic packaging, energy materials, biomedicine, etc., especially in 3D printing technology. 3D technology breaks through the traditional processing technology. It is a technology that uses bondable materials such as powdered metal or plastic to construct objects by layer-by-layer deposition. It can realize the preparation of complex micro-components, and has high production efficiency and raw material utilization. High, without mold processing. With the rapid development of 3D printing technology, the demand for spherical metal powder for 3D printing...

Claims

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Application Information

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IPC IPC(8): B22F9/10
Inventor 董伟高玉来许富民康世薇盖如坤魏宇婷
Owner DALIAN UNIV OF TECH
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