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Amorphous soft magnet core and manufacturing method thereof

A soft magnetic core and magnetic core technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems that the iron core is difficult to meet the requirements, the excitation current is small, and the function of the amorphous iron core is single.

Active Publication Date: 2013-04-17
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the function of the amorphous iron core after the above-mentioned annealing process is single. For example, the iron core obtained by the above-mentioned annealing method is difficult to meet the requirements for an iron core with comprehensive soft magnetic properties that has the characteristics of high remanence and low excitation current.

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  • Amorphous soft magnet core and manufacturing method thereof
  • Amorphous soft magnet core and manufacturing method thereof
  • Amorphous soft magnet core and manufacturing method thereof

Examples

Experimental program
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Effect test

example 1

[0058] Change the alloy composition to Co 58 Fe 5 Ni 10 Si 11 B 16 The cobalt-based amorphous thin strip is wound into an annular iron core with an inner diameter of 20 mm and an outer diameter of 31 mm, and placed in a tubular heat treatment furnace for heat treatment. The heat treatment temperature is in the range of 350-550 ° C, and the heat treatment time is about 0.5 h~6h, during heat treatment according to Figure 1A As shown, a static magnetic field of 800A / m is applied longitudinally along the amorphous thin strip, and the static hysteresis loop and magnetic performance parameters of the ring iron core are tested by the impact method.

[0059] Figure 4 It is the central area diagram of the hysteresis loop of the amorphous soft magnetic core at a temperature of 380°C in a hydrogen protective atmosphere for 0.5h, 2h, 4h and 6h respectively. It can be seen that Fe 5 co 58 Ni 10 Si 11 B 16 After the amorphous soft magnetic core undergoes a series of longitudinal ...

example 2

[0061] Change the alloy composition to Fe 65 co15 Si 5 B 15 The iron-based amorphous thin strip is wound into an annular iron core with an inner diameter of 20mm and an outer diameter of 31mm, and placed in such as Figure 1C The heat treatment is carried out under the double-biased annular magnetic field environment shown, the annealing temperature is 380 ° C, and the holding time is set to 5, 20, 40, 60 and 120 minutes respectively. The static hysteresis loop and the ring iron core are tested by the impact method Magnetic performance parameters. Such as Figure 6A As shown, the hysteresis loops of the iron core obtained under the condition of no magnetic field in the heat treatment process are symmetrically distributed, but after the double-biased circular magnetic field treatment, the core exchange bias characteristic is significant, Figure 6B Further, in the double-biased annular magnetic field environment, the heat treatment holding time gradually increases, and the ...

example 3

[0063] Cobalt-based amorphous iron core Fe 5 co 58 Ni 10 Si 11 B 16 After heat treatment in the magnetic field, the hysteresis loop is measured by the impact current detection method as follows: Figure 7 As shown in (a), the hysteresis loop of the annealed cobalt-based soft magnetic core is completely shifted to the right of the origin, that is, it presents a positive bias feature, and it is very obvious. The magnetic field annealed cobalt-based magnetic core according to figure 2 In the way shown, a coil with a certain number of turns is wound on the ring core, and then connected to the pulse power supply. With the output of the reverse pulse current, a pulse magnetic field opposite to the direction of the magnetic field applied during annealing is induced inside the core. Through Adjust the size of the reverse pulse current to control the magnitude of the reverse pulse magnetic field. After each reverse magnetic impact, remove the magnetic core and measure the change...

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Abstract

The invention discloses an amorphous soft magnet core and a manufacturing method thereof. The manufacturing method of the amorphous soft magnet core includes: manufacturing an amorphous soft magnet alloy tape; coiling the alloy tape into a circular core in the preset size; subjecting the circular core to magnetostatic field annealing to obtain exchange biasing; and subjecting the circular core subjected to magnetostatic field annealing to functional controllable operation of loop biasing. Maximum induction of the amorphous soft magnet core manufactured by the manufacturing method can be obtained by drive current as small as possible, and optimal operation is achieved.

Description

technical field [0001] The present invention relates to an iron core and its manufacturing method, more particularly, the present invention relates to a soft magnetic core with exchange bias behavior and its manufacturing method. Background technique [0002] The amorphous soft magnetic tape material made by melt rapid quenching technology has good properties due to its thin processing thickness (about 0.025-0.04mm) and high resistivity (about 130μΩcm, which is more than twice that of silicon steel and permalloy). High-frequency characteristics are widely used in the field of electromagnetic function conversion such as transformer cores, inductor cores, and yokes. When the soft magnetic alloy strip is applied to the transformer core, the advantages and disadvantages of its magnetic properties such as saturation magnetic induction, initial permeability and coercive force determine the practical value and market share of the soft magnetic core. If it is used at a higher frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153H01F41/02
Inventor 何峻周磊王煜景永强赵栋梁
Owner CENT IRON & STEEL RES INST
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