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A method and device for efficiently preparing ultrafine spherical metal powder

A metal powder and spherical technology, which is applied in the field of efficient preparation of ultrafine spherical metal powder, can solve the problems of poor spreadability, fluidity, and poor sphericity, and achieve controllable particle size, narrow distribution range, and strong controllability Effect

Active Publication Date: 2017-02-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the problems of poor sphericity, poor spreadability and fluidity in the preparation process of metal powder for 3D printing proposed above, a method and device for efficiently preparing ultrafine spherical metal powder are provided

Method used

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  • A method and device for efficiently preparing ultrafine spherical metal powder
  • A method and device for efficiently preparing ultrafine spherical metal powder

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Experimental program
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Effect test

Embodiment 1

[0049] The specific implementation of batch preparation Sn63-Pb37 ultrafine spherical powder:

[0050] Break the Sn63-Pb37 raw material into small pieces, put them into the left molten pool 18 and the right molten pool 5 after ultrasonic vibration, and select the aperture size of the round hole on the holed gasket 9 installed at the bottom of the crucible 8 according to the requirements, such as preparing 25 μm -50μm particles, select the aperture of 0.02mm-1.0mm, such as preparing 50μm-100μm particles, select the aperture of 1.0mm-2.0mm (such as figure 2 shown); the amount of Sn63-Pb37 raw materials put into 50%-70% of the left molten pool 18 and right molten pool 5 volumes, as figure 1 shown;

[0051] Use the mechanical pump 20 to pump the housing 7 and the crucible 8 to a low vacuum of 5 Pa, and then use the diffusion pump 21 to pump the housing 7 and the crucible 8 to a high vacuum of 0.001 Pa; use the left inlet pipe 19 of the crucible and the right inlet pipe 3 of the ...

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Abstract

The invention discloses a high-efficiency superfine spherical metal powder preparation device, which comprises a shell, a crucible and a powder collecting area, and is characterized in that the crucible is in a circular structure that the inside and the outside are nested, the bottom of the inner accommodating cavity of the crucible and the bottom of the outer accommodating cavity of the crucible are provided with central holes which are through; a space used for flowing molten metal is arranged between the bottom of the inner accommodating cavity and the bottom of the outer accommodating cavity; a tabletting is arranged above the central hole of the inner accommodating cavity, and a drive rod contacts with the tabletting; the central hole bottom of the outer accommodating cavity is provided with a gasket with a hole; the powder collecting area comprises a catch tray and a rotating disk, wherein the catch tray is arranged on the bottom of the shell and the rotating disk is arranged above the catch tray and is connected with a motor. The invention further discloses a method of preparing the superfine spherical metal powder, the method mainly combines a pulse microcellular injection method and a centrifugal atomization method, and the superfine spherical metal powder meeting the usage requirements that the grain size distribution range is narrow, the sphericity is high, the spreadability and the mobility are good, and the production efficiency is high can be prepared.

Description

technical field [0001] The invention belongs to the technical field of spherical metal powder preparation, in particular to a method and device for efficiently preparing ultrafine spherical metal powder by combining a pulse microhole injection method and a centrifugal atomization method. Background technique [0002] With the continuous development of materials in the direction of light weight, miniaturization and integration, spherical powder materials are widely used in electronic packaging, energy materials, biomedicine and other fields. 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. Metal powders for 3D printing require high sphericity, narrow particle size distribution range, no satellite drops, good spreadability and unifor...

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
Owner DALIAN UNIV OF TECH
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