High-squareness cobalt-based amorphous alloy iron core and preparation method thereof

A technology of amorphous alloy and squareness ratio, which is applied in the field of cobalt-based amorphous alloy magnetic core and its preparation, can solve the problems of poor temperature stability, large eddy current loss, and low Curie point, and achieve high resistivity and low core loss , The effect of good inductance attenuation performance

Active Publication Date: 2019-11-01
DAYOU SCIENTFIC & TECHNICAL CO LTD
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Problems solved by technology

At such a high frequency, the permalloy due to the low resistivity leads to too much eddy current loss, which causes the temperature to rise and the efficiency to decrease; ferrite has a high resistivity, but the Curie point is too low and the temperature stability is poor

Method used

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  • High-squareness cobalt-based amorphous alloy iron core and preparation method thereof

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Embodiment 1

[0034] According to the following method steps, 1), cobalt-based amorphous alloy pretreatment, first the cobalt-based amorphous alloy components with different particle sizes for preparing high squareness ratio cobalt-based amorphous alloy magnetic cores are pulverized into particle powders, That is to say, the composition of atomic mass percentage is as follows: Fe: 4%, Mn: 2%, Mo: 4%, Si: 10%, B: 11%, W 0.3%, Co: the balance; the W is La particles The powder is fully mixed to form pretreated cobalt-based amorphous alloy powder particles;

[0035] 2) Melting cobalt-based amorphous alloy steel ingots, the pretreated cobalt-based amorphous alloy powder particles prepared in step 1) are placed in a non-vacuum induction melting device, and then added after they are completely melted, and silicon and La are added last. Control the smelting temperature within 1400°C, uniformly smelt for 75-80 minutes, pour into the cooling device to form a cobalt-based amorphous alloy steel ingot; ...

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Abstract

The invention discloses a high-squareness cobalt-based amorphous alloy iron core and a preparation method thereof. The high-squareness cobalt-based amorphous alloy iron core comprises the following components: by atomic mass percentage, 2 to 4% of Fe, 1 to 2% of Mn, 2 to 4% of Mo, 10 to 13% of Si, 11 to 13% of B, 0 to 0.5% of W and the rest being Co, wherein W is Tb or La or a mixture of Tb and La. By optimizing the alloy formulation design, by adding a small amount of rare earth element W, master alloy is prepared through batching and steelmaking, a single-roller melt quenching method is usedafter secondary remelting to prepare a cobalt-based amorphous alloy magnetic core, the high squareness is kept to be Br / Bs no smaller than 90, the low coercive force Hc is smaller than 0.3A / m, the temperature stability is high, and high Bs value and high magnetic permeability are achieved.

Description

Technical field: [0001] The invention relates to a cobalt-based amorphous alloy magnetic core and a preparation method thereof, in particular to a magnetic core with high magnetic permeability, low loss and low coercive force of traditional soft magnetic alloy materials, as well as fast response and high High squareness ratio cobalt-based amorphous alloy iron core with excellent characteristics of sensitivity and temperature stability and high saturation magnetic induction and its preparation method. Background technique: [0002] Switching power supply is an inseparable electrical equipment in our daily life. At present, the operating frequency of switching power supply has been mentioned above hundreds of kHz, and the wide application in switching power supply puts forward higher requirements for soft magnetic materials. At such a high frequency, the permalloy due to the low resistivity leads to too much eddy current loss, which causes the temperature to rise and the effi...

Claims

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Application Information

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IPC IPC(8): H01F1/153H01F41/02
CPCH01F1/15333H01F1/15341H01F41/022H01F41/0226
Inventor 周国华黄从伟毛文龙欧阳有根
Owner DAYOU SCIENTFIC & TECHNICAL CO LTD
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