Method and device for preparing spherical metal powder through combined atomization

Abstract

The invention discloses a method and device for preparing spherical metal powder through combined atomization, and belongs to the technical field of metal powder preparation. The device comprises a metal melting system, a water atomizing system, a powder drying system, a laser spheroidizing system, a powder collecting system, a gas circulating system and a control system. A water atomization method has the characteristics of low cost, high production efficiency and small granularity but the prepared powder is uneven in morphology and high in oxygen content; a laser spheroidizing method is highin laser energy and directivity controllability and can spheroidize irregular powder; and the two methods are combined so that advantages can be combined and disadvantages can be overcome, and the combined method is suitable for preparing spherical metal powder. The method and device have good application prospects in actual production of advanced manufacturing technologies such as 3D printing.

Description

Technical field: [0001] The invention belongs to the technical field of metal powder preparation, and in particular relates to a combined atomization method and device for preparing spherical metal powder. Background technique: [0002] With the rapid development of science and technology, the application of metal powder is more and more extensive, so the preparation of metal powder is also very important. Among the prepared metal powders, compared with irregular powders, spherical powders have superior properties such as good fluidity, good sinterability and controllable reaction, and are increasingly widely used in mass production and scientific research. Spherical metal powder is the raw material for advanced manufacturing technologies such as 3D printing (additive manufacturing) and metal injection molding. Among them, 3D printing technology is an emerging technology that is rapidly developing in the field of manufacturing. , home appliances, biomedicine and other fiel...

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Problems solved by technology

Although the melting process of this method is non-contact, effectively avoiding the introduction of impurities, and the prepared powder has a high degree of sphericity, but the prepared powder is relatively coarse, the composition uniformity of the powder is uncontrollable, and the rotation speed of the electrode rod is relatively high. The electrode and transmission requirements of the equipment are relatively high, the preparation process is not easy to control, and the powder production efficiency is average. It is necessary to prepare alloy bars first, and the cost of powder production is high.

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