Amorphous nanocrystalline magnetic core heat treatment method

Abstract

The invention discloses an amorphous nanocrystalline magnetic core heat treatment method. The amorphous nanocrystalline magnetic core heat treatment method comprises the steps that (1) a to-be-treatedmagnetic core is placed into a transverse magnetic field heat treatment furnace, and protective gas is led in; (2) heat treatment and magnetic treatment are carried out, wherein in the first stage, the temperature rises to about 300 DEG C from the room temperature, the wasted time is about 60 min, heat preservation is carried out for about 30 min, then the temperature rises to about 400 DEG C, the wasted time is about 30 min, and heat preservation is carried out for about 60 min; in the second stage, the temperature rises to T1 from about 400 DEG C, the wasted time is about 30 min, heat preservation is carried out at T1 for about 210 min, and meanwhile, a transverse magnetic field is applied in the second stage; in the third stage, the magnetic field is removed, meanwhile, the temperaturerises to about 510 DEG C from T1, the wasted time is about 20 min, heat preservation is carried out for about 40 min, then the temperature rises to T2 to be subjected to heat preservation, and the wasted time is about 90 min; and in the fourth stage, heating is stopped, cooling is carried out to the room temperature, wherein the T1 is 460 DEG C-480 DEG C, and the T2 is 560 DEG C-570 DEG C.

Description

technical field [0001] The invention relates to the technical field of amorphous magnetic core processing, and more particularly relates to a heat treatment method for an amorphous and nanocrystalline magnetic core. Background technique [0002] The amorphous and nanocrystalline soft magnetic materials developed in recent years, such as iron-based amorphous and nanocrystalline soft magnetic materials, require the smallest possible magnetic crystal anisotropy constant and saturation magnetostriction coefficient, so that the magnetic core has low coercivity. force, low loss and high initial permeability. Unlike traditional soft magnetic materials, which require uniform and large grains as much as possible, in the unique amorphous nanocrystalline dual-phase microstructure of iron-based amorphous nanocrystalline soft magnetic materials, nanocrystalline grains need to be as small and High density. In addition, the high frequency and miniaturization of amorphous and nanocrystall...

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Problems solved by technology

[0005] However, the process and operation of the above-mentioned vacuum heat treatment equipment and non-vacuum heat treatment equipment are relatively complicated, and there are problems that the performance of the magnetic core is not stable, and the performance of the magnetic core in the same furnace varies greatly.

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