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Preparation method of fine elemental spherical metal powder particles for 3D printing

A metal powder, 3D printing technology, used in metal processing equipment, transportation and packaging, additive processing, etc., can solve the problems of low purity of metal or alloy powder, low utilization rate of raw materials, uncontrollable particle size, etc., and achieve low oxygen content, increased yield, high density effect

Active Publication Date: 2016-12-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to solve the problems of low purity, uncontrollable particle size, low utilization rate of raw materials and high price of metal or alloy powder for 3D printing.

Method used

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  • Preparation method of fine elemental spherical metal powder particles for 3D printing
  • Preparation method of fine elemental spherical metal powder particles for 3D printing
  • Preparation method of fine elemental spherical metal powder particles for 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. Using the raw material high-purity cobalt block (purity 99.99wt%) as the anode and tungsten as the cathode, first evacuate and introduce argon until the vacuum pressure reaches 0.04MPa, and form a high-strength arc through the discharge effect. After the arc is completed Introduce hydrogen until the vacuum pressure reaches 0.03MPa, and form solid high-purity cobalt nanoparticles by evaporating metal gas atoms and condensing them. The phase detection pattern is as follows: figure 1 a, the microscopic appearance is as figure 2 a; Using the existing patented technology (authorized patent number 201010219344.3), the cobalt nanoparticles are mixed with polyvinyl alcohol, polyethylene glycol and deionized water, then ball milled for 60 minutes, and then mechanically stirred for 20 minutes to obtain a uniform and stable suspension slurry. , using closed-circulation spray drying equipment for agglomeration and granulation to obtain spherical cobalt particles of 20 t...

Embodiment 2

[0020] Example 2. The raw material high-purity iron block (purity 99.99wt%) was used as the anode, and argon gas was first introduced until the vacuum pressure reached 0.05MPa, and a high-strength arc was formed by discharge action. After the arc was completed, hydrogen was introduced until the vacuum pressure reached 0.02 MPa, solid high-purity iron nanoparticles are formed by the condensation of vaporized metal gas atoms, and the phase detection pattern is as follows figure 1 b, The results of the selected area electron diffraction pattern and the crystal plane calibration of the cubic crystal structure are as follows figure 2 b; Using the existing patented technology (authorized patent number 201010219344.3), the iron nanoparticles were mixed with polyvinyl alcohol, polyethylene glycol and deionized water, ball milled for 70 minutes, and then mechanically stirred for 30 minutes to obtain a uniform and stable suspension slurry. The closed-loop spray drying equipment is used...

Embodiment 3

[0021]Example 3. The raw material high-purity nickel block (purity 99.99wt%) was used as the anode, and argon gas was first introduced until the vacuum pressure reached 0.06MPa, and a high-strength arc was formed through the discharge action. After the arc was completed, hydrogen was introduced until the vacuum pressure reached 0.01 MPa, through the condensation of vaporized metal gas atoms to form solid high-purity nickel nanoparticles, the phase detection pattern is as follows figure 1 c, The statistical results of particle size distribution of nano-nickel powder particles are as follows figure 2 c; using the existing patented technology (authorized patent number 201010219344.3), the nickel nanoparticles are mixed with polyvinyl alcohol, polyethylene glycol and deionized water, then ball milled for 80min, and then mechanically stirred for 40min to obtain a uniform and stable suspension slurry, Agglomeration and granulation are carried out with closed-circulation spray dryin...

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Abstract

The invention relates to a preparation method of fine elemental spherical metal powder particles for 3D printing, and belongs to the technical field of metal powder preparation. The preparation method comprises the following steps: adopting a high-purity metal block material as a raw material; carrying out arc evaporation under the atmosphere of inert gas, and simultaneously charging hydrogen to control the heat conduction and the activity of gas atoms of the metal, so that the gas atoms are cooled and deposited, and high-purity elemental nanometer metal powder particles are obtained; conducting aggregating granulation on the high-purity elemental nanometer metal powder particles, so that micron-sized elemental metal powder of relatively high density is obtained; and finally, conducting heat treatment on the micron-sized elemental metal powder obtained after granulation, so that functions of degumming and densified consolidation are realized, and the elemental metal powder particles of which the granularity, the sphericity, the liquidity and the oxygen content meet requirements of 3D printing are obtained. Compared with other technical methods, the preparation method has the advantages that the sphericity, the particle size distribution and the oxygen content of metal particles are highly controllable, the process is simple, and the cost is low.

Description

technical field [0001] The invention relates to a preparation method of fine-particle element spherical metal powder for 3D printing, and belongs to the technical field of metal powder preparation. Background technique [0002] 3D printing technology integrates cutting-edge technologies in many fields such as digital modeling technology, electromechanical control technology, information technology, material science and chemistry, and has been used in product prototypes, mold manufacturing, bioengineering and medicine, jewelry making and other fields. Fine processing technology and greatly improve the efficiency and precision of production. However, the 3D printing process puts forward higher requirements for metal powder materials, such as the particle size range of 20-50 microns, high sphericity and low oxygen content. At present, the fine-grained spherical metal powder required in China basically relies on imports. Due to the bottleneck problem of low raw material utiliza...

Claims

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Application Information

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IPC IPC(8): B22F9/12B22F9/14B22F9/02B22F1/00B33Y70/00
CPCB22F9/026B22F9/12B22F9/14B33Y70/00B22F2998/10B22F2999/00B22F1/065B22F1/148B22F1/142B22F2201/20B22F2201/11B22F2201/013B22F1/10
Inventor 聂祚仁张亚娟宋晓艳王海滨刘雪梅贺定勇
Owner BEIJING UNIV OF TECH
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