Electromagnetic stirring and vibration combined device for preparing semi-solid slurry of black metal

Abstract

The invention relates to an electromagnetic stirring and vibration combined device for preparing semi-solid slurry of a black metal. The device comprises three main sections: a melting furnace, a stirring chamber, and a crystallizer or a rheologic conveyor, wherein the melting furnace is arranged at the upper part of the stirring chamber, and the crystallizer or the rheologic conveyor is arrangedat the lower part of the stirring chamber. When molten metal is poured into the melting furnace, a medium-frequency induction heater is used for maintaining temperature and uniformly heating; when the temperature of the molten metal is within the liquidus temperature range, the molten metal is poured into a stirring crucible in a quantitative amount, and a non-dendritic fine equiaxial spherical or nearly spherical microstructure is obtained by electromagnetically stirring and mechanically vibrating the molten metal; and the prepared fine nearly spherical semi-solid slurry is poured into the crystallizer, then cooled and solidified into a blank, or the slurry is poured into the rheologic conveyor and then is rapidly conveyed to a forming mold for rheoforming. The device can be used for preparing semi-solid slurry of a black metal and nonferrous metal, which improves the efficiency and the quality for preparing metal semi-solid slurry and shortens the preparation time. The device is especially suitable for rheoforming.

Description

technical field [0001] The invention belongs to the technical field of metal semi-solid slurry preparation, in particular to an electromagnetic stirring and vibration composite device for ferrous metal semi-solid slurry preparation. Background technique [0002] Metal semi-solid forming is a new metal forming technology, which combines the advantages of casting and forging, and only requires a small number of processes to form more complex shapes and high-performance workpieces. Compared with traditional casting, this technology has lower forming temperature, significantly longer mold life, and can improve the precision and mechanical properties of the workpiece. Compared with traditional hot forging, semi-solid forming technology has low forming force, good fluidity, and can achieve near-net shape, especially only one process can form workpieces with more complex shapes. So far, this technology has been widely used in the field of low melting point non-ferrous metals, espe...

AI Technical Summary

Problems solved by technology

The traditional method generally adopts the stopper rod type, which has the advantage of a relatively simple structure, but when pouring, the semi-solid slurry is discharged by gravity or pressure, and the flow rate is unstable, so the quantitative error is large, and there is still no good one. Solution

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