Method and device for manufacturing amorphous powder

A preparation device and amorphous technology, which is applied in the field of preparation of amorphous powder, can solve the problems of not being able to cool rapidly, hindering the rapid cooling of molten droplets, and not being able to obtain completely amorphous powder, so as to increase the cooling rate and reduce the The effect of oxygen content

Active Publication Date: 2014-10-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this water vapor film has a lower heat transfer rate than water, it hinders the rapid cooling of molten droplets
Therefore, there will be a problem that the center of the droplet cannot be cooled rapidly, so that a completely amorphous powder cannot be obtained, which affects the performance of the device.

Method used

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  • Method and device for manufacturing amorphous powder
  • Method and device for manufacturing amorphous powder
  • Method and device for manufacturing amorphous powder

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preparation example Construction

[0037] The invention provides a kind of preparation method of amorphous powder, comprises the steps:

[0038] S100: melting the raw material to obtain a molten liquid; the raw material in this embodiment is an amorphous metal;

[0039] S200: The molten liquid interacts with the atomized gas during the process of flowing out and falling, breaking and dispersing into small liquid droplets;

[0040] S300: Obtain the first fluid after the small liquid droplets move at high speed in water for a certain period of time;

[0041] S400: Collect and separate the first fluid to obtain an amorphous powder.

[0042] The present invention adds high-speed motion to the powder preparation method by gas atomization. The basic process is that after the molten metal flows out from the outlet, the atomized gas is used to disperse the molten metal liquid into small liquid droplets, and then the small liquid droplets fall to a In the container, the high-speed movement of the container drives the ...

Embodiment 1

[0063] Using the above preparation device and method to prepare Fe-P-B-Nb-Cr amorphous metal powder, the main process parameters to be controlled and adjusted are: the alloy melt is superheated at 200°C, the melting process is protected by argon, and the gas atomization pressure is 10MPa , The melt flow rate during atomization is 2kg / min, the rotating water injection pressure is 8.5MPa, and the wall of the cylinder is 60° from the falling direction of the molten metal flow.

[0064] The XRD collection of illustrative plates of the Fe-P-B-Nb-Cr powder that makes by above-mentioned parameter is as Figure 5 As shown, there are only diffuse diffuse scattering peaks on its XRD pattern, and there is no obvious crystallization peak corresponding to crystallization, indicating that the prepared powder has an amorphous structure. The scanning electron microscope (SEM) test shows that the amorphous powder has the characteristics of good sphericity, bright surface and few defects. The S...

Embodiment 2

[0066] Using the above preparation device and method to prepare Fe-P-B-Nb-Cr amorphous metal powder, the main process parameters to be controlled and adjusted are: the alloy melt is overheated at 150°C, the melting process is protected by argon, and the gas atomization pressure is 10MPa , the melt flow rate during atomization is 4kg / min, the rotating water injection pressure is 10MPa, the cylinder wall and the falling direction of the molten liquid flow are at 45°, and the cylinder wall rotation speed is 1000 rpm.

[0067] The Fe-P-B-Nb-Cr powder prepared according to the above parameters is detected as an amorphous structure by XRD. The powder has good sphericity, bright surface and few defects. According to the analysis of the laser particle size analyzer, the average particle size of the prepared powder is It is about 50 μm, and the maximum particle size is about 100 μm.

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Abstract

The invention provides a method and device for manufacturing amorphous powder. The method for manufacturing the amorphous powder comprises the following steps that raw materials are fused to obtain fusion liquid; in the flowing-out and falling process, the fusion liquid interacts with atomized gas to be broken into droplets; the droplets move in the water at the high speed for a certain time to obtain first fluid; the first fluid is collected and separated to obtain the amorphous powder. The method for manufacturing the amorphous powder comprises a fusion device, a gas atomization device, a rotating water system and a discharge collection device. The gas atomization mode is adopted to enable the fusion liquid to be broken into the droplets, the final oxygen content of the power can be reduced, high-speed water flowing can break through a water steam film generated on the surface by droplet solidification in the water, the cooling rate is improved, and therefore the complete amorphous alloy powder with the larger grain diameter can be obtained.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method and device for preparing amorphous powder. Background technique [0002] With the development of electronic power and communication industry, electronic components are developing in the direction of miniaturization, high frequency and high current, and the requirements for electromagnetic compatibility of electronic equipment are getting higher and higher. The traditional amorphous strip core , soft ferrite and metal magnetic powder cores cannot meet the demand, and the application is limited. Mainly manifested in: (1) The loss of the amorphous strip iron core is very large at high frequency, which limits its application in the high frequency field; (2) The soft magnetic ferrite has low high frequency loss, but the saturation magnetic induction and permeability The efficiency is low, which cannot meet the development needs of miniaturization and high current; (3) The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 董亚强常春涛满其奎黎嘉威李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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