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Fe-based amorphous alloy, and dust core obtained using Fe-based amorphous alloy powder

A powder magnetic core and alloy powder technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problem that Fe-based amorphous alloys cannot have a glass transition temperature, are not disclosed, and cannot be obtained. Saturation magnetic flux density and other issues

Active Publication Date: 2014-03-19
ALPS ALPINE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, conventional Fe-Cr-P-C-B-Si-based Fe-based amorphous alloys cannot have a glass transition temperature (Tg) and cannot obtain a high saturation magnetic flux density Bs (specifically, about 1.5T or more).
[0004] Although the composition of the Fe-Cr-P-C-B-Si based soft magnetic alloy is disclosed in the following patent documents, Fe- Cr-P-C-B-Si soft magnetic alloy

Method used

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  • Fe-based amorphous alloy, and dust core obtained using Fe-based amorphous alloy powder
  • Fe-based amorphous alloy, and dust core obtained using Fe-based amorphous alloy powder
  • Fe-based amorphous alloy, and dust core obtained using Fe-based amorphous alloy powder

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Embodiment

[0076] (Experiment of saturation magnetic flux density Bs and other alloy characteristics: liquid quenching method)

[0077] Hereinafter, Fe-based amorphous alloys having the compositions in Table 1 were produced in a ribbon shape by a liquid quenching method. Specifically, the belt was obtained under a reduced-pressure Ar atmosphere by a single-roll method in which a melt of Fe-Cr-P-C-B-Si was ejected from a nozzle of a crucible onto a rotating roll and quenched. method. As belt manufacturing conditions, the distance (gap) between the nozzle and the roller surface is set to about 0.3mm, the peripheral speed of the roller is set to about 2000m / min, and the injection pressure is set to 0.3kgf / cm 2 about.

[0078] The plate thickness of each obtained tape was about 20 to 25 μm.

[0079] [Table 1]

[0080]

[0081]

[0082]

[0083] It was confirmed by XRD (X-ray diffraction apparatus) that each sample in Table 1 was amorphous (amorphous). In addition, Curie tempera...

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Abstract

In order to provide an Fe-based amorphous alloy which, in particular, has a glass transition temperature (Tg) and which is capable of achieving a high saturation magnetic flux density (Bs), and a dust core obtained using an Fe-based amorphous alloy powder, the Fe-based amorphous alloy of the present invention is characterized in being represented by the compositional formula Fe100-a-b-c-d-eCraPbCcBdSie (a, b, c, d and e denote atomic percentages), wherein 0 at% <= a <= 1.9 at%, 1.7 at% <= b <= 8.0 at%, 0 at% <= e <= 1.0 at%, the compositional proportion of Fe (100-a-b-c-d-e) is not lower than 77 at%, 19 at% <= b+c+d+e <= 21.1 at.%, 0.08 <= b / (b+c+d) <= 0.43, 0.06 <= c / (c+d) <= 0.87, and by having a glass transition temperature (Tg).

Description

technical field [0001] The present invention relates to Fe-based amorphous alloys used in, for example, powder magnetic cores of transformers, choke coils for power supplies, and the like. Background technique [0002] Powder magnetic cores used in step-up circuits for hybrid vehicles, reactors, transformers, or choke coils for power generation and transformation equipment are made by bonding Fe-based amorphous alloy powder and The material is pressed powder and formed. As the Fe-based amorphous alloy, glass alloys excellent in soft magnetic properties can be used. [0003] However, conventional Fe-Cr-P-C-B-Si-based Fe-based amorphous alloys cannot have a glass transition temperature (Tg) and cannot obtain a high saturation magnetic flux density Bs (specifically, about 1.5 T or more). [0004] Although the composition of the Fe-Cr-P-C-B-Si based soft magnetic alloy is disclosed in the following patent documents, Fe- Cr-P-C-B-Si soft magnetic alloy. [0005] prior art lit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02B22F1/00H01F1/153H01F1/26
CPCC22C33/003C22C45/02H01F1/15308B22F9/002H01F1/15375H01F1/28H01F41/0246C22C33/0228C22C33/0214B22F1/00H01F1/153H01F1/26
Inventor 高馆金四郎小柴寿人
Owner ALPS ALPINE CO LTD
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