Permanent magnet mixing equipment suitable for melt preparation and melt preparation method

Abstract

The invention provides permanent magnet mixing equipment suitable for melt preparation and a melt preparation method. The equipment includes a fixed device, a rotating device and a temperature controldevice. The fixed device comprises a fixed shaft (6), a fixed circular plate (10), a crucible (11) and a heat insulating sleeve (2), the fixed shaft (6) is connected to the fixed circular plate (10),the fixed circular plate (10) is connected to the heat insulating sleeve (2), the crucible (11) is located inside the heat insulating sleeve (2), the rotating device is connected to the fixed shaft (6), and the temperature control device is disposed inside the crucible (11). The equipment provided by the invention has the characteristics of simple and compact structure, convenient maintenance, high efficiency, low energy consumption and the like; non-contact permanent magnets are employed for stirring, and the melt cannot be polluted. The equipment provided by the invention adopts a single heat source and is equipped with a heat insulation device, so that the temperature field can be easily controllable. In addition, the heat source is located at the center of the crucible, thus avoidingthe generation of central vortices and reducing the number of defects generated at the melt center due to stirring.

Description

technical field [0001] The invention relates to the technical field of melt preparation, in particular to a permanent magnet stirring device suitable for melt preparation and a melt preparation method. Background technique [0002] With the development of the times and technology, the requirements for material performance are getting higher and higher. Magnetic fields have long been a concern for new process methods. Applying an external force field during the casting process can significantly improve the quality of the ingot and improve the performance of the ingot; the external force field mainly includes mechanical stirring, electric field, magnetic field, ultrasonic and other methods. Applying a magnetic field is a non-contact melt processing method, which not only promotes the uniformity and stability of the temperature field and flow field, reduces defects in the casting process, and the non-contact processing method will not pollute the melt. The addition of a magne...

AI Technical Summary

Problems solved by technology

The following problems still exist in this patented technology: the patent mainly uses an alternating electric field to generate an alternating magnetic field for electromagnetic stirring. When this stirring device is in operation, the coil needs to be cooled by water, and the skin effect is obvious, and the stirring effect on the center of the ingot is weak ( C.K.Jin, Microstructure of Semi-Solid Billets Produced by Electromagnetic Stirring and Behavior of Primary Particles during the Indirect Forming Process, Metals 8(4)(2018)271)

The technology of this invention still has the following problems: there is no heat insulation device between the outer wall of the crucible and the permanent magnet in this invention, the working environment of the permanent magnet is harsh, and it is unfavorable to the temperature control of the system

This device can only be used for the preparation of semi-solid solutions of magnesium alloys with low forming temperatures, and the working temperature does not exceed 550 ° C. It cannot be used to process most magnesium alloys and aluminum alloys with high forming temperatures.

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