Rotary disc with disturbance structure for metal centrifugal atomization powder making

Abstract

The invention provides a rotary disc with a disturbance structure for metal centrifugal atomization powder making. The rotary disc comprises a cylindrical disc body, and the disc body is provided with bulges and grooves, wherein the bulges are symmetrically arranged on the upper surface of the center of the disc by taking the circle center of the disc body as a base point and adopt a multi-circle annular distribution mode or a circle center radiation distribution mode; and the grooves take the circle center of the disc body as a base point and are staggered with the bulges. According to the rotary disc with the disturbance structure for metal centrifugal atomization powder making, a liquid film on the surface of the disc body can generate vibration under the action of the disturbance structure, the vibration forms unstable waves through propagation, and the unstable waves intensify and accelerate the process that the liquid film is centrifugally broken into liquid drops, so that the diameter of the liquid drops is smaller, and the forming time is shorter; and therefore, in the centrifugal atomization process of the disc body with the disturbance structure, the diameter of the liquid drops can be reduced, the atomization efficiency can be improved, and the powder yield can be increased.

Description

technical field [0001] The invention relates to the field of metal atomization, and in particular provides a turntable with a disturbance structure for metal centrifugal atomization powder making. Background technique [0002] At present, the atomization technologies applied to high temperature metal powder mainly include gas atomization method (AA method), vacuum induction gas atomization method (VIGA method), crucible-free electrode induction melting gas atomization method (EIGA method), plasma torch method (PA method), plasma rotary atomization method (PREP method) and rotary disc centrifugal atomization method, etc. [0003] Among them, the EIGA process melts the slowly rotating electrode material through a high-frequency induction coil and forms a fine liquid flow by controlling the melting parameters (the liquid flow does not need to contact the water-cooled crucible and the draft tube). When the alloy liquid flows through the atomizing nozzle, The liquid flow is crus...

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Problems solved by technology

The biggest advantage of EIGA powder is that there is no refractory material inclusion and low energy consumption. The disadvantage is that the metal powder produced by the current domestic technology has a relatively coarse particle size, and the segregation of the electrode will also lead to uneven composition of the alloy powder material.

Turntable atomization has the advantages of low cost and high particle size concentration, but if you need to obtain powder with very small particle size, you need a very high speed and a large diameter of the turntable. The speed itself is limited by the maximum speed of the drive such as the motor. Too high The rotating speed is prone to vibration damage. The centrifugal force and vibration brought by the large diameter of the turntable are very large, and the strength of the turntable is very high.

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