Title:
METHOD FOR PRODUCING MAGNETIC CORE
Document Type and Number:
WIPO Patent Application WO/2016/002945
Kind Code:
A1
Abstract:
This method for producing a magnetic core comprises a first heat treatment step, an intermediate production step and a second heat treatment step. In the first heat treatment step, a thin strip formed of an alloy composition is subjected to a heat treatment. In the intermediate production step, an intermediate is produced using the thin strip after the first heat treatment step. In the second heat treatment step, the intermediate is subjected to a heat treatment. The alloy composition has an amorphous phase as the main phase, and is represented by composition formula Fe100-a-b-c-d-e-fCoaBbSicPdCueCf (wherein 3.5 at% ≤ a ≤ 4.5 at%, 8 at% ≤ b ≤ 11 at%, 0 at% < c ≤ 2 at%, 3 at% ≤ d ≤ 5 at%, 0.5 at% ≤ e ≤ 1.1 at% and 0 at% ≤ f ≤ 2 at%). In the first heat treatment step, the thin strip is heated to a first temperature that is higher than the crystallization temperature of the alloy composition at a first heating rate. In the second heat treatment step, the intermediate is heated to a second temperature that is not higher than the crystallization temperature.
Inventors:
MAKINO AKIHIRO (JP)
SHARMA PARMANAND (JP)
NISHIYAMA NOBUYUKI (JP)
SHIMIZU KAZUYUKI (JP)
YOSHIDA KENJI (JP)
SHARMA PARMANAND (JP)
NISHIYAMA NOBUYUKI (JP)
SHIMIZU KAZUYUKI (JP)
YOSHIDA KENJI (JP)
Application Number:
PCT/JP2015/069328
Publication Date:
January 07, 2016
Filing Date:
July 03, 2015
Export Citation:
Assignee:
UNIV TOHOKU (JP)
ALPS ELECTRIC CO LTD (JP)
ALPS ELECTRIC CO LTD (JP)
International Classes:
H01F41/02; C21D6/00; C22C38/00; C22C45/02; H01F1/153
Foreign References:
| JP2000160241A | 2000-06-13 | |||
| JPH03268305A | 1991-11-29 |
Attorney, Agent or Firm:
YAMAZAKI TAKUYA (JP)
Takuya Yamazaki (JP)
Takuya Yamazaki (JP)
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