Method for preparing permanent magnet iron core

Abstract

The invention discloses electromagnet type transverse magnetic field heat treatment equipment comprising a heating furnace and an electromagnet, wherein the magnetic field direction generated by the electromagnet is parallel to the vertical direction of the heating furnace; the heating furnace comprises a furnace casing and a hearth formed by the furnace casing; and a heating element is arranged at the inner side of a furnace wall. In the process of preparing a permanent magnet iron core by using the equipment, an iron core to be treated is placed in the hearth of the transverse magnetic field heat treatment equipment; the temperature in the hearth is adjusted in the range of + / -10 DEG C of the Curie temperature of the iron core to be treated by using the heating element; a magnetic filedis applied to the direction vertical to the circumference of the iron core to be treated by using the magnet; and the magnetic filed intensity at the central point of the hearth is 0-800Gs and can becontinuously adjusted. The process and the equipment can be used for treating crystalline or amorphous magnetically soft alloy iron cores, the Curie temperatures of which are lower than 600 DEG C; the magnetic filed intensity in the center of the hearth is as high as 800Gs; and the invention has the advantages of low construction cost, high production efficiency as well as low cost and energy consumption.

Description

technical field [0001] The invention relates to the field of materials, specifically a preparation process and equipment for a permanent magnetic core, in particular a process for preparing a permanent magnetic core by transverse magnetic field heat treatment, and an electromagnet type transverse magnetic field heat treatment furnace. Background technique [0002] Soft magnetic materials are widely used in modern power industry, power electronics industry and electronics industry. There is one type of requirements for soft magnetic devices that requires the iron core to have a constant magnetic permeability μ under the action of a large magnetic field strength H. Depending on the application occasion, the value requirements range from 100,000 to 200,000. [0003] The current status of constant magnetic permeability materials is as follows: [0004] (1) The earliest constant magnetic permeability material is magnetic powder core, and its magnetic permeability μ is generally...

AI Technical Summary

Problems solved by technology

[0015]The Curie temperature of AlNiCo permanent magnets is mostly above 780℃, while the Curie temperature of amorphous alloys is 200℃~370℃, and that of nanocrystalline alloys is It is about 570°C, so in the experiment, it should be possible to use permanent magnets as the magnetic field source, add them to both ends of the iron core to be processed, and put them together in a heat treatment furnace for processing; but this is not suitable for large-scale production, especially for amorphous alloys , because under the action of a fixed constant magnetic field, the operation of picking and placing the iron core is very unsafe

Images