发明名称 |
Ferromagnetic amorphous alloy ribbon with reduced surface defects and application thereof |
摘要 |
A ferromagnetic amorphous alloy ribbon, a method of fabricating a ribbon and a wound transformer core are provided. The ribbon includes an alloy of FeaSibBcCd where 80.5≦a≦83 at. %, 0.5≦b≦6 at. %, 12≦c≦16.5 at. %, 0.01≦d≦1 at. % with a+b+c+d=100, and is cast from a molten state of the alloy, having a-surface tension of greater than or equal to 1.1 N/mi,. A defect length along a direction of the ribbon's length is between 5 mm and 200 mm, a defect depth less than 0.4 ×t μm and a defect occurrence frequency less than 0.05 ×w times within 1.5 m of ribbon length, where t is the ribbon thickness and w is the ribbon width in mm. The ribbon has a saturation magnetic induction exceeding 1.60 T and a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at 1.3 T induction level in an annealed straight strip form, and a core magnetic loss of less than 0.3 W/kg and an exciting power of less than 0.4 VA/kg in an annealed wound transformer core form and is suitable for use in transformer cores, rotational machines, electrical chokes, magnetic sensors and pulse power devices. |
申请公布号 |
US8968489(B2) |
申请公布日期 |
2015.03.03 |
申请号 |
US201012923076 |
申请日期 |
2010.08.31 |
申请人 |
Metglas, Inc.;Hitachi Metals, Ltd. |
发明人 |
Azuma Daichi;Hasegawa Ryusuke;Ogawa Yuichi;Theisen Eric A.;Matsumoto Yuji |
分类号 |
H01F27/25;B22D11/00;H01F1/153;B22D11/06;H01F41/02 |
主分类号 |
H01F27/25 |
代理机构 |
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代理人 |
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主权项 |
1. A ferromagnetic amorphous alloy ribbon comprising:
an alloy having a composition represented by FeaSibBcCd where 80.5≦a≦83 at. %, 0.5≦b≦6 at. %, 12≦c≦16.5 at. %, 0.01≦d≦1 at. % with a+b+c+d=100 and incidental impurities; the ribbon having been cast from a molten state of the alloy, with a molten alloy surface tension of greater than or equal to 1.1 N/m, the ribbon having a ribbon length, a ribbon thickness, a ribbon width, and a ribbon surface facing a casting atmosphere side, the ribbon having ribbon surface defects on the ribbon surface facing the casting atmosphere side, the ribbon surface defects being measured in terms of a defect length, a defect depth, and defect occurrence frequency, the defect length along a direction of the ribbon's length being between 5 mm and 200 mm, the defect depth being less than 0.4 33 t μm and the defect occurrence frequency being greater than zero and less than 0.05 ×w times per 1.5 m of ribbon length, where t is the ribbon thickness and w is the ribbon width in mm, and the ribbon having a saturation magnetic induction exceeding 1.60 T and exhibiting a magnetic core loss of less than 0.14 W/kg when measured at 60 Hz and at a 1.3 T induction level in an annealed straight strip form, and a core magnetic loss of less than 0.3 W/kg and an exciting power of less than 0.4 VA/kg when measured at 60 Hz and at a 1.3 T induction level in an annealed wound transformer core form. |
地址 |
Conway SC US |