A method and device for preparing ultrafine spherical metal powder for 3D printing

A metal powder and 3D printing technology, which is applied in the field of spherical particle preparation, can solve problems such as poor sphericity, poor spreadability and fluidity, and achieve the effects of high sphericity, consistent thermal history, and increased production

Active Publication Date: 2017-06-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
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  • 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 method and device for preparing ultrafine spherical metal powder for 3D printing are provided

Method used

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  • A method and device for preparing ultrafine spherical metal powder for 3D printing

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Effect test

Embodiment 1

[0048] Specific implementation of batch preparation of Sn-3Ag-0.5Cu spherical powder for 3D printing:

[0049] The Sn-3Ag-0.5Cu raw material is broken into small pieces, put into the left molten pool 15 and the right molten pool 5 after ultrasonic vibration, and the central hole diameter of the crucible is selected according to the needs, and the diameter of the central hole is in the range of 0.02mm-2.0 Between mm, such as preparing 25μm-50μm particles, choose a center hole of 0.02mm-1.0mm, such as preparing 50μm-100μm particles, choose a center hole of 1.0mm-2.0mm; the amount of Sn-3Ag-0.5Cu raw material put in reaches 50%-70% of the volume of the left molten pool 15 and the right molten pool 5, such as figure 1 shown;

[0050] Use the mechanical pump 18 to pump the shell 6 and the crucible 7 to a low vacuum of 5Pa or less, and then use the diffusion pump 19 to pump the shell 6 and the crucible 7 to a high vacuum of 0.001Pa; use the first crucible air inlet pipe 3 and the s...

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Abstract

The invention discloses a device for preparing ultra-fine spherical metal powder for 3D printing, which includes a shell, a crucible and a powder collection area arranged in the shell. The bottom of the receiving chamber and the bottom of the outer receiving chamber of the crucible are provided with a central hole that communicates with each other. A space for the circulation of molten metal is provided between the bottom of the inner receiving chamber and the bottom of the outer receiving chamber. Above the central hole of the inner receiving chamber is a There is a pressing tablet, and the transmission rod is in contact with the pressing tablet; the powder collecting area includes a collecting pan arranged at the bottom of the casing and a rotating disk connected with a motor connected to a motor above the collecting pan for atomizing metal powder particles. The invention also discloses a method for preparing ultra-fine spherical metal powder, which mainly combines the two methods of pulse microporous spraying method and centrifugal atomization method, and can prepare a narrow particle size distribution range, high sphericity, good spreadability and fluidity , Ultra-fine spherical metal powder with high production efficiency that meets the requirements of 3D printing.

Description

technical field [0001] The invention belongs to the technical field of spherical particle preparation, and specifically relates to a method and a device for preparing ultrafine spherical metal powder for 3D printing by combining a pulsed microhole injection method and a centrifugal atomization method. Background technique [0002] With the transformation of processing methods, 3D printing rapid prototyping technology has emerged and developed rapidly. This molding technology based on the concept of additive manufacturing uses bondable materials such as powdered metals to manufacture solid parts by layer-by-layer printing. This method has high production efficiency, high molding rate, and high material utilization rate, and will surely become the mainstream processing method in the future. With the development of 3D printing rapid prototyping technology, the demand for metal powder for 3D printing must continue to expand, and the quality requirements must continue to increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/10
Inventor 董伟许富民魏宇婷盖如坤康世薇刘船
Owner DALIAN UNIV OF TECH
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