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Preparation device and preparation method of metal powder

A preparation device and metal powder technology, which is applied in the field of metal powder preparation devices, can solve the problem of low powder extraction rate, achieve the effect of fast powder speed, uniform spreading, and spherical shape

Active Publication Date: 2019-04-16
BEIJING COMPO ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application CN 201710564998.1 discloses an atomization chamber, a device for preparing metal powder and its use method, Chinese patent application CN201711240113.9 discloses a large-amplitude ultrasonic spherical metal powder preparation device and method, and Chinese patent application CN 01140401.9 discloses Ultrasonic atomization preparation method and device of spherical metal powder. These three patents are all through the flow of molten metal to the umbrella-shaped ultrasonic energy-concentrating ring, using ultrasonic cavitation to atomize into powder, which is subjected to the energy concentrator. Limited by liquid film thickness and ultrasonic power, the powder output rate is low when the atomization flow rate is below 45um

Method used

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  • Preparation device and preparation method of metal powder
  • Preparation device and preparation method of metal powder
  • Preparation device and preparation method of metal powder

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preparation example Construction

[0042] figure 1 In the preparation device shown, the volumetric flow rate of the catheter 1 is 2-20 L / min, the rotational speed of the rotary liquid distributor 6 is 100-1000 rpm / min, and the working frequency of the ultrasonic atomizer 5 is 20-40 KHz.

[0043] Utilize this novel composite ultrasonic atomization device to realize the preparation method of spherical powder needs to be realized by the following steps: Install each device in the atomization tank 9 as required, vacuumize the atomization tank 9 to 10Pa, and fill nitrogen protection until the atomization tank 9 Oxygen content is below 400ppm. Turn on the ultrasonic atomization power supply, and turn on the rotating spindle of the rotary liquid distributor. The molten metal is transported to the rotary liquid distributor through the catheter, and the rotating rotary liquid distributor controls the molten metal to be evenly distributed on the inner surface of the ultrasonic atomizer, and the ultrasonic vibration on t...

Embodiment 1

[0046] In this embodiment, the structure of the rotating liquid distributor (A) is selected to assemble the preparation device. The rotating liquid distributor (A) has a diameter of 50mm and a taper of 30°. In this embodiment, the working speed of the high-speed electric spindle is 600 rpm / min. The angle of the upper gas injection ring is 75°, and the gas flow rate is 150mL / min, so as to ensure that the gas flow field in the atomization area is downward and reduce the probability of particle collision in the atomization area. The angle of the lower jet ring is 45°, and the gas flow rate is 1200mL / min, so as to ensure that the powder particles formed by flying out of the ultrasonic atomizer fly away from the atomization area quickly. In this embodiment, the catheter, the rotary liquid distributor, the ultrasonic nebulizer, and the power electric spindle are in concentric cooperation, so as to facilitate the working stability of the device and the smooth and stable transfer of ...

Embodiment 2

[0049] In this embodiment, the structure of the rotating liquid distributor (B) is selected to assemble the preparation device. The rotary liquid distributor (B) has 12 single-layer ring holes, and 4 layers are evenly distributed. The diameter of a single ring hole is 0.5mm, the diameter of the rotary liquid distributor is 50mm, and the diameter of the inner ring is 40mm, so as to increase the liquid stock of the rotary liquid distributor and ensure Melt can fly out from all layers. In this embodiment, the high-speed electric spindle operates at a rotational speed of 400 rpm / min, so that the metal liquid can quickly fly out of the rotary liquid distributor, and quickly lay a film on the ultrasonic atomizer. The angle of the upper gas injection ring is 75°, and the gas flow rate is 150mL / min, so as to ensure that the gas flow field in the atomization area is downward and reduce the probability of particle collision in the atomization area. The angle of the lower jet ring is 45...

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Abstract

The invention relates to a preparation device and a preparation method of metal powder. The preparation device comprises an atomization tank, a liquid guide pipe, an ultrasonic atomizer, an energy device of the ultrasonic atomizer, a rotary liquid distributor and a power device of the rotary liquid distributor, wherein the liquid guide pipe, the ultrasonic atomizer, the energy device of the ultrasonic atomizer, the rotary liquid distributor and the power device of the rotary liquid distributor are positioned in the atomization tank, the liquid guide pipe and the rotary liquid distributor are coaxially arranged, so that metal melt is conveyed to the rotary liquid distributor through the liquid guide pipe, the rotary liquid distributor and the ultrasonic atomizer are coaxially arranged and are close to each other, so that the metal melt is centrifugally dispersed to the surface of the ultrasonic atomizer through the rotary liquid distributor to form a metal film. The preparation method of the metal powder specifically relates to a preparation process through the device. According to the preparation device and the preparation method of the metal powder, the melt can be rapidly and uniformly distributed through centrifugal atomization, the metal powder of a high degree of sphericity and micro surface roundness is prepared by combining the ultrasonic atomization technology, the problems that the centrifugal atomizing on special-shaped powder is poor in powder surface, and the ultrasonic atomization preparation is low in efficiency and low in productivity are solved, and the purpose of preparing the spherical metal powder by ultrasonic and centrifugal composite atomization is achieved.

Description

technical field [0001] The invention relates to the technical field of metal powder preparation, in particular to a metal powder preparation device and a preparation method. Background technique [0002] As an important industrial material, metal powder is increasingly used in power electronics, Internet of Things, artificial intelligence, aerospace and other fields. With the development of technologies such as thermal spraying, additive manufacturing, lightweight equipment, and electronic surface mount, the performance of particle size distribution, microscopic morphology, and stability of metal powder materials is getting higher and higher, and because metal powder Parameters such as surface roundness and sphericity determine the stability of metal powder during screening, transportation, and use. Therefore, these factors promote the development of metal powder preparation technology in the direction of high sphericity, high stability, and high quality. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/10
CPCB22F9/10
Inventor 张少明胡强刘建王志刚温育苗林刚朱学新赵新明张富文刘英杰徐蕾
Owner BEIJING COMPO ADVANCED TECH
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