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Method and device for efficiently preparing superfine spherical metal powder with high melting point

A metal powder and melting point technology, which is applied in the field of high melting point metal powder preparation, can solve the problems of poor sphericity, poor spreadability and fluidity, etc., and achieve the effects of high sphericity, increased output, and uniform and controllable size

Inactive Publication Date: 2015-04-22
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 powder for 3D printing, a method and device for efficiently preparing ultrafine spherical metal powder with high melting point are provided

Method used

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  • Method and device for efficiently preparing superfine spherical metal powder with high melting point
  • Method and device for efficiently preparing superfine spherical metal powder with high melting point

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Embodiment 1

[0044] The specific embodiment that prepares copper spherical metal powder with above-mentioned device and method is:

[0045] First, the copper block is broken into block particles with a particle diameter of 2 cm, and is loaded into the crucible 3. The amount of copper particles loaded reaches 2 / 3 of the capacity of the crucible 3, and then the material is a pad with small holes made of graphite. The sheet 17 is installed on the bottom of the crucible 3 by screws, and the chamber door 10 is closed; the crucible 3 and the chamber 20 are pumped to a low vacuum of 1Pa-5Pa with a mechanical pump 18, and then a high vacuum is pumped to 10Pa with a diffusion pump 19. -3 Pa, filled with high-purity inert protective gas argon to atmospheric pressure; set the heating temperature to 1400°C, energize the induction heater 5, and continue to keep warm for 30 minutes after the temperature reaches 1400°C, so that all the copper particles in the crucible 3 are melted into a melt 7 Open the ...

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Abstract

The invention discloses a device for efficiently preparing superfine spherical metal powder with a high melting point. The device comprises a shell, and a crucible and a powder collecting area which are arranged in a chamber of the shell, and is characterized in that a plurality of melting pools with the same volume are formed inside the crucible, and gaskets with small holes which are communicated with the chamber are fixed at the bottoms of the melting pools; a transmission rod comprises transmission support rods with the number the same as that of the melting pools, and the bottoms of the transmission support rods are aligned with circular holes in the gaskets with small holes; a thermocouple is arranged inside the crucible, and an induction heater is arranged outside the crucible; and the powder collecting area comprises a rotating disk which is used for atomizing metal droplets and is arranged at the bottom of the chamber and connected with a motor, and a collecting tank is also formed in the bottom of the chamber. The invention also discloses a method for efficiently preparing superfine spherical metal powder with the high melting point. By mainly combining a pulse micropore injection method with a centrifugal atomization method, the method can be used for preparing superfine spherical metal powder which is narrow in particle size distribution interval, high in sphericity, good in spreadability and liquidity, and high in production efficiency, and meets the 3D printing and using requirements.

Description

technical field [0001] The invention belongs to the technical field of high-melting-point metal powder preparation, and specifically relates to a method and a device for efficiently preparing ultrafine high-melting-point 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 miniaturization and integration, spherical powder materials have been widely concerned and applied in electronic packaging, energy materials, biomedicine, etc., especially in 3D printing. 3D printing technology breaks through the traditional preparation technology. It is a technology that uses bondable materials such as powdered metal or plastic to construct objects through layer-by-layer printing. It can realize the preparation of complex and tiny components, and the production efficiency is high. The material utilization rate is high and no mold is require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10
Inventor 董伟高玉来许富民盖如坤魏宇婷康世薇
Owner DALIAN UNIV OF TECH
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