Large-amplitude ultrasonic spherical metal powder preparing device and method

A metal powder and preparation device technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor sphericity, large consumption of inert gas particle size distribution range, etc., and achieve narrow distribution, low oxygen content, and good sphericity Effect

Active Publication Date: 2018-04-06
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultrasonic gas atomization is to use ultrasonic vibration energy and gas flow impact kinetic energy to break up the liquid flow, and the efficiency of powder making is significantly improved, but it still needs to consume a large amount of inert gas, and the particle size distribution range is still wide, and the sphericity is poor

Method used

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  • Large-amplitude ultrasonic spherical metal powder preparing device and method
  • Large-amplitude ultrasonic spherical metal powder preparing device and method
  • Large-amplitude ultrasonic spherical metal powder preparing device and method

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preparation example Construction

[0035] The preparation method of the spherical metal powder can be realized by the following steps by using the above-mentioned large-amplitude ultrasonic spherical metal powder preparation device:

[0036] (1) After the atomization chamber 3 is evacuated by a vacuum pump, an inert gas is introduced into the atomization chamber 3 from the air inlet;

[0037] (2) Use the ultrasonic generator 8 to convert the input electrical signal into an electrical signal of a specific frequency that matches the transducer 7, drive the transducer 7 to work, and excite the transducer 7 to generate longitudinal stretching vibration, and the longitudinal stretching vibration effect For the slotted horn 6, the four mutually parallel spiral grooves on the wall of the slotted circular tube of the slotted horn 6 are amplified, and the output amplitude is relatively large;

[0038] (3) The molten metal in the melting furnace 4 flows to the umbrella-shaped tool head 5 and forms a thin liquid layer on th...

Embodiment 1

[0040] The piezoelectric crystal stack of the transducer 7 in this embodiment is formed by laminating and pressing six PZT-4 piezoelectric ceramic sheets. The slotted horn 6 is composed of a vibration input section and a vibration output section to form a stepped horn structure; the vibration input section is composed of a slotted round tube, the length of the vibration input section is 59mm, and the vibration output section is 59mm long , 4 spiral grooves parallel to each other are opened on the side wall of the grooved pipe along the circumferential direction. The starting points of the 4 spiral grooves are on the same circumference and are evenly distributed on the pipe wall. The distance between the ends of the slotted round tube is equal, the outer diameter of the slotted round tube is 40mm, the inner diameter is 18mm, the pitch of the spiral groove is 184mm, the groove width is 3mm, the groove depth is 3mm, and the helix angle is 63.7°. The umbrella tip cone angle of the...

Embodiment 2

[0042] The piezoelectric crystal stack of the transducer 7 in this embodiment is formed by laminating and pressing four PZT-4 piezoelectric ceramic sheets. The slotted horn 6 is composed of a vibration input section and a vibration output section to form a stepped horn structure. The total length of the vibration input section is 118mm, and the length of the vibration output section is 29.5mm; see image 3 , the vibration input section is composed of two slotted round tubes connected in series. The diameter difference between one slotted round tube and the adjacent slotted round tube is 2mm. 4 spiral grooves parallel to each other, the starting points of the 4 spiral grooves are on the same circumference, and are evenly distributed on the pipe wall, the distance between the beginning and end of the spiral grooves is equal to the two ends of the grooved pipe, and the pitch of the spiral grooves Both are 184mm, the groove width is 3mm, and the groove depth is 3mm. The helix angl...

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Abstract

The invention relates to a large-amplitude ultrasonic spherical metal powder preparing device and method, and belongs to the technical field of metal powder preparing. The device comprises a tank body, an inner cavity of the tank body is divided into a fusion chamber and an atomizing chamber from top to bottom, and a support, an energy converter arranged on the support and connected with an ultrasonic generator, a slotting amplitude-change pole arranged along a longitudinal vibration output shaft of the energy converter and an umbrella-shaped tool head connected with the output end of the slotting amplitude-change pole are arranged in the atomizing chamber; the energy converter is stimulated under external voltage to generate weak mechanical vibration, the slotting amplitude-change pole can amplify particle displacement of the mechanical vibration, the large vibration amplitude can be obtained, a metal thin liquid layer formed on the umbrella top of the umbrella-shaped tool head arouses capillary waves under the supersonic vibration effect, when the vibration amplitude of the vibration face is larger, liquid drops fly out from wave crests to form met frog, the particle size of theprepared metal powder is small, and the degree of sphericity is good.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal powder materials, in particular to a preparation device and method of large-amplitude ultrasonic spherical metal powder. Background technique [0002] Most high-performance alloy powders have important engineering application prospects and great market development potential. Therefore, in recent years, they have been more and more widely used in aerospace, electronic information, energy power, metallurgical machinery and other fields. With the development of modern science and technology, the requirements for the variety, quality and cost of powder materials are getting higher and higher, and the preparation of metal powder is developing in the direction of high purity, fineness, controllable composition and particle size, and low cost. Although traditional fine powder preparation methods such as high-energy crushing, water atomization, gas atomization and centrifugal atomization have...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/00
CPCB22F9/08B22F2009/0804B22F1/065
Inventor 张光斌代志强
Owner SHAANXI NORMAL UNIV
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