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Device for preparing metal powder based on gas-solid coupling atomization

A metal powder, gas-solid technology, applied in metal processing equipment, transportation and packaging, additive processing, etc., can solve the problem of difficult control of powder oxygen content and fine powder yield, high powder oxygen content, irregular shape, etc. problems, to achieve the effect of increasing the yield of fine powder, narrow particle size distribution, and good sphericity

Active Publication Date: 2022-03-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from the current metal powder preparation process, the metal reduction and hydride dehydrogenation processes will cause the powder to have high oxygen content and irregular shape; the oxygen content and fine powder yield of the powder prepared by the plasma spheroidization method are difficult to control, and the equipment cost Higher; the quality of the powder produced by the plasma atomization process is high, but the raw material needs better plasticity to be processed into a wire and is subject to foreign patents; the particle size of the powder prepared by the plasma rotating electrode method is relatively large, and the current technology is foreign monopoly

Method used

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  • Device for preparing metal powder based on gas-solid coupling atomization
  • Device for preparing metal powder based on gas-solid coupling atomization
  • Device for preparing metal powder based on gas-solid coupling atomization

Examples

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Effect test

Embodiment 1

[0067] Based on the device for preparing metal powder by gas-solid coupling atomization, the specific steps for preparing Ti811 are as follows:

[0068](1) The prefabricated Ti811 metal bar 20 with a size of Ф25×800mm is installed on the feed mechanism 22; the feed speed is 0.1cm / s, the calculation requires a power supply of 3.1kW and a current frequency of 15.7kHz, considering the heat exchange efficiency In the lower case, use an induction heating power supply that can provide a power of 30kW and a current frequency of 20kHz to 30kHz; feed circulating cooling water into the heat dissipation component of the induction heater;

[0069] Select alumina ceramic particles with a particle size of 400 μm to 800 μm as the solid particles of the atomization medium; the argon gas pressure output from the argon cylinder 11 that feeds argon into the powder feeder 10 is 0.8 MPa, and is directly supplied to the atomization nozzle 18 The argon pressure of the argon steel cylinder 11 outputt...

Embodiment 2

[0073] Based on the device for preparing metal powder by gas-solid coupling atomization, the specific steps for preparing Ti811 are as follows:

[0074] (1) The prefabricated Ti811 metal bar 20 with a size of Ф25×800mm is installed on the feed mechanism 22; the feed speed is 0.1cm / s, the calculation requires a power supply of 3.1kW and a current frequency of 15.7kHz, considering the heat exchange efficiency In the lower case, use an induction heating power supply that can provide a power of 30kW and a current frequency of 20kHz to 30kHz; feed circulating cooling water into the heat dissipation component of the induction heater;

[0075] Select NaCl particles with a particle size of 800 μm to 1000 μm as the solid particles of the atomization medium; the argon gas pressure output from the argon cylinder 11 that feeds argon into the powder feeder 10 is 1.0 MPa, and is directly passed into the atomization nozzle 18 The argon pressure that enters the argon steel cylinder 11 output ...

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Abstract

The invention relates to a device for preparing metal powder based on gas-solid coupling atomization, and belongs to the technical field of metal powder preparation. A feeding mechanism in the device is mounted on a melting chamber, melting heating equipment is mounted in the melting chamber, and the melting chamber is mounted on the upper portion of an atomizing tower and used for conveying metal bars to the melting chamber and heating and melting the metal bars; the two ends of the atomizing nozzle are located in the melting chamber and the atomizing tower in a one-to-one correspondence mode, the powder feeder and the gas storage tank are connected with the atomizing nozzle, and the impact crushing effect on metal liquid drops is enhanced through a gas-solid coupling atomizing medium; the spheroidizing delay induction coil assembly is mounted in the atomizing tower, so that the spheroidizing time of the metal liquid drops is prolonged; and the powder collector is arranged at the lower part of the atomizing tower and is used for collecting the powder atomized and condensed by the atomizing tower. The device is simple in structure and easy to operate, high-performance metal powder which is good in sphericity degree and fluidity, small in particle size and narrow in particle size distribution can be prepared, and good application prospects are achieved.

Description

technical field [0001] The invention relates to a device for preparing metal powder based on gas-solid coupled atomization, and belongs to the technical field of metal powder preparation. Background technique [0002] Metal powder is one of the most important raw materials in 3D printing technology, and its performance directly affects the forming performance and mechanical properties of 3D printing parts. The powder used for 3D printing is required to have the characteristics of high purity, low oxygen content, good sphericity, small particle size and uniform distribution. Judging from the current metal powder preparation process, the metal reduction and hydride dehydrogenation processes will cause the powder to have high oxygen content and irregular shape; the oxygen content and fine powder yield of the powder prepared by the plasma spheroidization method are difficult to control, and the equipment cost Higher; the quality of the powder produced by the plasma atomization ...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/065B33Y40/00
CPCB22F9/082B33Y40/00B22F2009/0888B22F2009/0824B22F2009/0848Y02P10/25
Inventor 范群波谢文强高彧雷伟申鑫雨闫倩芸陈凯苑京久应家尧
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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