Title:
SOFT MAGNETIC IRON ALLOY PLATE, AND IRON CORE AND ROTATING ELECTRIC MACHINE UTILIZING SAID SOFT MAGNETIC IRON ALLOY PLATE
Document Type and Number:
WIPO Patent Application WO/2023/132141
Kind Code:
A1
Abstract:
The present invention provides: a soft magnetic iron alloy plate which not only is capable of suppressing an excessive increase in Pi while exhibiting a higher Bs than an electromagnetic pure iron plate, but also can be produced at a lower cost than permendur; and an iron core and a rotating electric machine which utilize the soft magnetic iron alloy plate. The soft magnetic iron alloy plate according to the present invention is characterized by having a chemical composition containing 1 to 30 atomic% of Co, 0.2 to 10 atomic% of N, 0.5 to 5 atomic% of M element which can form MN-type nitride, and the balance Fe and impurities, wherein when a cross-section of the soft magnetic iron alloy plate is observed, nitride particles of the M element have an average particle size of 0.5 µm or less and are deposited at a number density of 50/100 µm2 or less.
Inventors:
TABATA TOMOHIRO (JP)
KOMURO MATAHIRO (JP)
ASARI YUSUKE (JP)
TERADA SHOHEI (JP)
KOMURO MATAHIRO (JP)
ASARI YUSUKE (JP)
TERADA SHOHEI (JP)
Application Number:
PCT/JP2022/042836
Publication Date:
July 13, 2023
Filing Date:
November 18, 2022
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
C22C38/00; C23C8/26; H01F1/147; H01F1/16; C21D1/18; C21D1/76; C21D6/00
Domestic Patent References:
| WO2021131162A1 | 2021-07-01 |
Foreign References:
| JPS637332A | 1988-01-13 | |||
| JPH03244108A | 1991-10-30 | |||
| US20210123126A1 | 2021-04-29 | |||
| CN103268799A | 2013-08-28 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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