Title:
SOFT MAGNETIC IRON ALLOY PLATE, PRODUCTION METHOD FOR SAID SOFT MAGNETIC IRON ALLOY PLATE, AND IRON CORE AND ROTARY ELECTRICAL MACHINE USING SAID SOFT MAGNETIC IRON ALLOY PLATE
Document Type and Number:
WIPO Patent Application WO/2023/195226
Kind Code:
A1
Abstract:
The present invention provides: a soft magnetic iron alloy plate that makes it possible to exhibit higher Bs and lower Pi than an electromagnetic pure iron plate, and that enables a greater cost reduction than permendur; a production method for said soft magnetic iron alloy plate; and an iron core and a rotary electrical machine that use said soft magnetic iron alloy plate. A soft magnetic iron alloy plate according to the present invention is characterized by having a chemical composition comprising 1-30 at% Co, 0.5-10 at% N, and 0-1.2 at% V, with the remainder being Fe and impurities, said soft magnetic iron alloy plate having a ferrite phase as the main phase and including an iron nitride phase of a tetragonal structure, wherein tensile strain in the range of 10-110% of the tensile elastic critical strain occurs along the in-plane direction of the soft magnetic iron alloy plate.
Inventors:
TABATA TOMOHIRO (JP)
TERADA SHOHEI (JP)
ASARI YUSUKE (JP)
KOMURO MATAHIRO (JP)
TERADA SHOHEI (JP)
ASARI YUSUKE (JP)
KOMURO MATAHIRO (JP)
Application Number:
PCT/JP2023/004079
Publication Date:
October 12, 2023
Filing Date:
February 08, 2023
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
C21D6/00; C21D1/06; C21D1/18; C21D8/12; C22C38/00; H01F1/147; H01F27/245; H01F1/18
Domestic Patent References:
| WO2021131162A1 | 2021-07-01 |
Foreign References:
| JPH03244108A | 1991-10-30 | |||
| JPS637332A | 1988-01-13 | |||
| JPH05304014A | 1993-11-16 | |||
| US20210123126A1 | 2021-04-29 | |||
| CN103268799A | 2013-08-28 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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