Metal powder preparation method and device based on controllable magnetic levitation smelting technology

A magnetic levitation smelting and metal powder technology, which is applied in the field of levitation smelting, can solve the problems that cannot meet the needs of industrial production, cannot stably control the flow rate of molten metal, and cannot avoid contact between metal materials and crucibles, and achieves convenient real-time measurement and monitoring, tensioning The effect of increasing the force and increasing the tension force

CN104493189BInactive Publication Date: 2016-08-24CHINA JIUYUAN HI TECH EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-08-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method and device for metal powder preparation based on a controllable magnetic levitation melting technology. The method includes the following steps: one end of a metal wire passes through an electromagnetic field at a constant speed; the metal wire is warmed and melted in the electromagnetic field and forms metal droplets continuously; the metal droplets drop into a gas atomization area continuously; and the metal droplets are impacted, scattered and cooled by high-pressure and high-speed inert gas in the gas atomization area to form the metal powder. The device includes a vacuum cavity, a pair of rollers arranged in the vacuum cavity and a quartz glass tube with two open ends. The axial directions of the two rolls are parallel, the rotation directions of the two rollers are opposite, and a gap between rotation surfaces of the two rollers is matched with the diameter of the metal wire. One end of the quartz glass tube is connected with an outlet of the metal wire, and the other end of the quartz glass tube is connected with a gas atomization nozzle and a powder collector successively. A coil is wound around the quartz glass tube. The method and device for metal powder preparation based on the controllable magnetic levitation melting technology can stably control the flow rate of melting metal liquid and can satisfy industrial production requirements.
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Description

technical field

[0001] The invention relates to the field of suspension smelting, in particular to a method and device for preparing metal powder based on controllable magnetic suspension smelting technology. Background technique

[0002] The powder prepared by gas atomization technology has fine particle size, high sphericity and low oxygen content. It is currently an important method to produce high-performance spherical metal powder. The production principle of gas atomization technology is to use high-pressure gas to atomize high-temperature molten metal into fine metal powder.

[0003] Usually, the gas atomization powder making device adopts the method of crucible melting, that is, the metal is melted in the crucible first, and then the molten metal is poured into the diversion device, and the molten metal flowing out from the diversion hole is rapidly melted under the action of high-pressure and high-speed airflow. Disperse to form fine powder. It is feasible for thi...

Examples

Embodiment 1

[0051] A method for preparing metal powder based on controllable magnetic levitation smelting technology, comprising the following steps:

[0052] Step 1: Make one end of the metal wire pass through the electromagnetic field area at a constant speed.

[0053] Step 2: The metal wire heats up and melts in the electromagnetic field area, and continuously forms metal droplets.

[0054] Step 3: Metal droplets are continuously dripped into the gas atomization area.

[0055] Step 4: The high-pressure and high-speed inert gas breaks up the metal droplets in the gas atomization area.

[0056]Step 5: The metal droplets are broken up by the impact and cooled to form metal powder.

[0057] All the above steps are usually carried out under vacuum conditions, because usually metals can chemically react with certain components in the air, and the components change.

[0058] The above-mentioned method is suitable for the production of metal wire as the raw material, and it is easy to contr...

Embodiment 2

[0061] A metal powder preparation device based on controllable magnetic levitation smelting technology, such as figure 1 shown, including:

[0062] A vacuum chamber 10, the vacuum chamber 10 is provided with an air suction port 2 and a wire outlet 6, and the air suction port 2 is connected to a vacuum suction device;

[0063] A pair of rollers 3 arranged in the vacuum cavity 10, the axes of the two rollers 3 are parallel, the rotation directions of the two rollers 3 are opposite, and the gap between the rotating surfaces of the two rollers 3 is equal to the diameter of the wire 1 Matching; the gap between the rotating surfaces of the two rollers 3 communicates with the wire outlet;

[0064] A quartz glass tube 4 with openings at both ends, one end of the quartz glass tube 4 is connected to the wire outlet, and the other end is connected to the gas atomization nozzle 8 and the powder collector 11 in sequence;

[0065] The quartz glass tube 4 is wound with a coil 5 for molten ...

Embodiment 3

[0071] A metal powder preparation device based on controllable magnetic levitation smelting technology, such as figure 2 and 3 shown, including:

[0072] A vacuum chamber 10, the vacuum chamber 10 is provided with an air suction port 2 and a wire outlet 6, and the air suction port 2 is connected to a vacuum suction device;

[0073] The vacuum cavity 10 is provided with a roller shaft, a wire guide sleeve 15, a wire guide sleeve 16 and a pair of rollers 3, the axes of the two rollers 3 are parallel, the rotation directions of the two rollers 3 are opposite, and the two rollers 3 The gap between the rotating surfaces matches the diameter of the metal wire 1; the axes of the wire guide sleeve 15, the wire guide sleeve 16 and the quartz glass tube 4 are collinear; the wire 1 is wound on the roller shaft and wound on the roller shaft Driven by the two rollers 3, the wire 1 passes through the wire inlet guide sleeve 15, the gap between the two rollers 3, the wire outlet guide sle...