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Method and device for preparing superfine spherical metal powder for 3D printing

A metal powder, 3D printing technology, applied in the field of spherical particle preparation, can solve the problems of poor spreadability and fluidity, poor sphericity, etc., and achieve the effect of consistent thermal history, high sphericity, and uniform particle size

Active Publication Date: 2015-04-29
DALIAN UNIV OF TECH
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  • Summary
  • 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 method and device for preparing ultrafine spherical metal powder for 3D printing are provided

Method used

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  • Method and device for preparing superfine spherical metal powder for 3D printing

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Experimental program
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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] Break the Sn-3Ag-0.5Cu raw material into small pieces, put them into the left molten pool 15 and the right molten pool 5 after ultrasonic vibration, and select the central hole diameter of the crucible according to the demand, and the central hole diameter ranges from 0.02mm to 2.0 mm, if preparing 25μm-50μm particles, select a central hole of 0.02mm-1.0mm, such as preparing 50μm-100μm particles, select a central hole of 1.0mm-2.0mm; the amount of Sn-3Ag-0.5Cu raw materials can reach 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 housing 6 and the crucible 7 to a low vacuum of 5 Pa, and then use the diffusion pump 19 to pump the housing 6 and the crucible 7 to a high vacuum of 0.001 Pa; use the first crucible inlet pipe 3 and the second crucible inlet pipe 17. The ...

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Abstract

The invention discloses a device for preparing superfine spherical metal powder for 3D printing. The device comprises a shell, a crucible disposed in the shell and a powder collecting area. The device is characterized in that the crucible is of an inner-outer-embedded ring structure, 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 communicated, space allowing molten metal to flow is arranged between the bottom of the inner accommodating cavity and the bottom of the outer accommodating cavity, a pressing piece is disposed above the central hole of the inner accommodating cavity, and a transmission rod contacts with the pressing piece; the power collecting area comprises a collecting plate disposed at the bottom of the shell and a rotary disc which is disposed above the collecting plate, connected with a motor and used for atomizing metal power particles. The invention further discloses a method for preparing the superfine spherical metal powder. The method mainly combines a pulse micro-pore injection method and a centrifugal atomizing method. By the method and the device, the superfine spherical metal powder which is narrow in particle size distribution interval, high in sphericity, good in flowability and spreading property and high in production efficiency, and the superfine spherical metal powder conforms to the application 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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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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