Ultrasonic atomization preparation device and method for spherical metal powder

Abstract

The invention discloses an ultrasonic atomization preparation device and method for spherical metal powder. The ultrasonic atomization preparation device for the spherical metal powder comprises an atomization chamber, metal bar materials arranged inside the atomization chamber, and a plasma arc generation system arranged above the metal bar materials, wherein the metal bar materials are installed on an ultrasonic vibration system, the ultrasonic vibration system is arranged on a rotary lifting mechanism, and a powder collection cylinder is arranged below the metal bar materials. The method comprises the following steps that (1) metal bars are installed; (2) the atomization chamber is vacuumized and then is filled with inert gas; (3) the metal bars are stricken through plasma arcs; (4) the rotary lifting mechanism rotates the metal bars; (5) the ultrasonic vibration system vibrates the metal bars; (6) the metal bars are atomized into metal liquid drops, and the metal liquid drops fly away from the metal bars and are condensed into the metal powder. The ultrasonic atomization preparation device and method for the spherical metal powder can prepare the spherical metal powder with any component, and the metal powder is fine in particle diameter and narrow in particle size distribution.

Description

technical field [0001] The invention relates to the technical field of preparation of metal powder materials, in particular to an ultrasonic atomization preparation device and a preparation method of spherical metal powder. Background technique [0002] As an important class of industrial raw materials, metal powders are increasingly used in communications, electronics, automobiles, aerospace and other fields. With the development of technologies such as metal injection molding, thermal spraying, metal rapid prototyping, and electronic surface mount, the performance requirements for the particle size, purity, and shape of metal powder materials are gradually increasing, which in turn pushes the powder preparation technology towards narrow The direction of particle size, low oxygen content, high efficiency and low cost is developed. [0003] At present, the main methods of preparing metal powder are: mechanical pulverization, plasma rotating electrode method and gas atomizat...

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Problems solved by technology

Chinese patent application CN201180053612.1 discloses an ultrasonic atomization device, Chinese patent application CN200980112649.X discloses an ultrasonic atomization device, and Chinese patent application CN201010122821.4 discloses a combined ultrasonic atomization device. These three patents Both are suitable for the atomization of various solutions, but not for the preparation of metal powders

Since the head of the ultrasonic concentrator needs to be in contact with high-temperature liquid metal, cavitation corrosion will occur. At the same time, the metal powder material prepared is limited by the melting point of the head material of the ultrasonic concentrator. At present, this patent involves the method of preparing metal powder by ultrasonic atomization And equipment can only prepare low-melting point metal powder, such as tin-lead alloys with a melting point of no more than 350°C

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