Preparation device and method for superfine metal powder

A technology of ultra-fine metal powder and preparation device, which is applied in the field of 3D printing, can solve the problems of metal powder particle size and sphericity, and achieve the effects of good fluidity, high sphericity, and low consumption of inert gas

Active Publication Date: 2017-07-04
XIAN BRIGHT ADDTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Another object of the present invention is to provide a method for preparing ultra-fine metal powder usi

Method used

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  • Preparation device and method for superfine metal powder
  • Preparation device and method for superfine metal powder
  • Preparation device and method for superfine metal powder

Examples

Experimental program
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Effect test

preparation example Construction

[0042] A kind of structure of the preparation device of ultrafine metal powder of the present invention is as figure 1As shown, the lower part of the housing 1 is provided with an openable isolation plate 2, which divides the housing into upper and lower spaces. The uppermost part of the upper space is provided with a metal fixing device. The metal fixing device adopts a clamping device (not shown in the figure) to clamp and fix the tapered end of the metal rod 3 downward vertically. The tapered end of the metal rod Metal droplets are formed by heating with a heating device arranged below the clamping device, and the heating device adopts an induction coil 4 surrounding the tapered end of the metal rod. Just below the conical end of the metal bar 3 (that is, just below the induction coil 4) is provided with a centrifuge 5, the centrifuge 5 is a centrifuge, and the centrifuge adopts a funnel-type structure with an upper opening and a lower opening, and its upper opening is alig...

Embodiment 1

[0053] This example is a preparation process of tantalum (Ta1) powder for spherical metal powder 3D printing, and the chemical composition of Ta1 is shown in Table 1.

[0054] Table 1 Chemical composition of Ta1

[0055]

[0056] The specific operation is: remove the oil stain and oxide layer on the surface of the tantalum rod, fix it in the heating area, turn on the argon gas system and the heating system, and heat the tantalum rod to form a molten liquid. The molten liquid was dropped into a centrifugal device with a rotating speed of 1300r / min and centrifuged for 1min. In the process of heating and centrifuging, turn on the hot gas device in advance, adjust the angle between the axis of the gas ejection device and the center line of the metal bar to be 45°, so that the temperature of the ejected argon gas is 350°C, and the pressure is kept at 2MPa~3MPa . After centrifugation, the thin layer of molten liquid droplets falling along the guide tube is broken and atomized i...

Embodiment 2

[0058] This example is a preparation process of tantalum (Ta1) powder for spherical metal powder 3D printing, and the chemical composition of Ta1 is shown in Table 2.

[0059] Table 2 Chemical composition of Ta1

[0060]

[0061] The specific operation is: remove the oil stain and oxide layer on the surface of the tantalum rod, fix it in the heating area, turn on the argon gas system and the heating system, and heat the tantalum rod to form a molten liquid. The molten liquid was dropped into a centrifugal device with a rotating speed of 1200r / min and centrifuged for 1.5min. In the process of heating and centrifuging, turn on the hot gas device in advance, adjust the angle between the axis of the gas ejection device and the center line of the metal bar to be 45°, so that the temperature of the ejected argon gas is 300°C, and the pressure is kept at 3MPa~4MPa . After centrifugation, the thin layer of molten liquid droplets falling along the guide tube is broken and atomized...

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Abstract

The invention discloses a preparation device and method for superfine metal powder. The preparation method comprises the steps that a metal rod is vertically fixed to a heating device and is heated and melted, molten metal droplets drop into a lower centrifugal device, and thin-layer molten state metal droplets are formed on the wall surface of the centrifugal device under the action of centrifugal force, downwards flow, and drop into lower hot gas devices; and the hot gas devices are at least three gas nozzles uniformly surrounding the lower portion of the centrifugal device, the nozzles spray hot gas onto the molten state metal droplets, hot gas breaking melting is conducted, broken droplets are solidified into small-size powder particles in the falling process, and the powder particles fall into a recycling device, so that the superfine metal powder is obtained. The metal powder obtained through the preparation method is small in particle size and high in powder sphericity degree. In addition, the preparation device is simple in structure, simple in preparation process, high in operability, low in inert gas consumption, high in production efficiency and wide in application field.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a preparation device of ultrafine metal powder, and also relates to a preparation method of ultrafine metal powder. Background technique [0002] 3D printing technology is a new type of printing technology, which can be formed layer by layer directly according to the three-dimensional model, without being limited by the structure of the parts, without machining or any molds, which greatly shortens the development cycle of parts, reduces production costs and improves productivity. However, this technology has high requirements on metal powder. In addition to good plasticity, 3D printing metal powder must also meet the requirements of fine powder particle size, narrow particle size distribution, high sphericity, good fluidity and high bulk density. [0003] At present, the methods of producing metal powder mainly include reduction method, electrolysis method, carbon...

Claims

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Application Information

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IPC IPC(8): B22F9/10B33Y70/00B22F9/04
CPCB22F9/04B22F9/10B22F2009/042B22F2009/043B33Y70/00
Inventor 赵晓明许海嫚徐天文
Owner XIAN BRIGHT ADDTIVE TECH CO LTD
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