Device and method for the production of a metallic strip
US-9700937-B2 · Jul 11, 2017 · US
Ferromagnetic amorphous alloy ribbon with reduced surface defects and application thereof
US8968489B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8968489-B2 |
| Application number | US-92307610-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 31, 2010 |
| Priority date | Aug 31, 2010 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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A ferromagnetic amorphous alloy ribbon, a method of fabricating a ribbon and a wound transformer core are provided. The ribbon includes an alloy of Fe a Si b B c C d 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.
First claim
Opening claim text (preview).
What is claimed is: 1. A ferromagnetic amorphous alloy ribbon comprising: an alloy having a composition represented by Fe a Si b B c C d 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 fa…
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Electricity · mapped topic
Electricity · mapped topic
- B22D11/0611Primary
Operations & Transport · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8968489B2 cover?
- A ferromagnetic amorphous alloy ribbon, a method of fabricating a ribbon and a wound transformer core are provided. The ribbon includes an alloy of Fe a Si b B c C d 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 directio…
- Who is the assignee on this patent?
- Azuma Daichi, Hasegawa Ryusuke, Ogawa Yuichi, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification B22D11/0611. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).