Title:
SOFT MAGNETIC IRON ALLOY SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/195928
Kind Code:
A1
Abstract:
Provided are: a soft magnetic iron alloy sheet which has a saturation magnetic flux density comparable to permendur and an iron loss equivalent to electromagnetic pure iron, and is cheaper than permendur; and a manufacturing method therefor. A soft magnetic iron alloy sheet according to the present invention is characterized by: having a chemical composition containing 0-30 at% of Co, 0.1-11 at% of N, and 0-1.2 at% of vanadium, with the remainder consisting of Fe and impurities; and including, in the thickness direction of said soft magnetic iron alloy sheet, a surface layer region having an average nitrogen concentration of 1-15 at%, and an internal region having a lower average nitrogen concentration than the surface layer region, wherein the surface layer region has a thickness corresponding to 1-30% from both principal surfaces of said soft magnetic iron alloy sheet, and iron nitride martensite having a tetragonal structure is generated.
Inventors:
TABATA TOMOHIRO (JP)
KOMURO MATAHIRO (JP)
ASARI YUSUKE (JP)
TAMURA SHINYA (JP)
TERADA SHOHEI (JP)
KOMURO MATAHIRO (JP)
ASARI YUSUKE (JP)
TAMURA SHINYA (JP)
TERADA SHOHEI (JP)
Application Number:
PCT/JP2021/035519
Publication Date:
September 22, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
C21D6/00; C22C38/00; H01F1/147; H01F1/16
Domestic Patent References:
| WO2015193295A1 | 2015-12-23 |
Foreign References:
| JPS6217132A | 1987-01-26 | |||
| JPH04268027A | 1992-09-24 | |||
| JPH03244108A | 1991-10-30 | |||
| JP2005226116A | 2005-08-25 | |||
| US20200038951A1 | 2020-02-06 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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