Title:
ELECTROMAGNETIC SOFT IRON
Document Type and Number:
WIPO Patent Application WO/2023/210061
Kind Code:
A1
Abstract:
Provided is an electromagnetic soft iron that has excellent cold workability and that achieves both machinability and magnetic properties at high levels. This electromagnetic soft iron has a component composition containing, in mass%, 0.02% or less of C, 0.05% or less of Si, 0.010-0.500% of Mn, 0.002-0.020% of P, 0.001-0.050% of S, 0.010-0.050% of Al, 0.0010-0.0200% of O, 0.0010-0.0100% of N, and 0.0003-0.0065% of B, the remaining portion being iron and unavoidable impurities. In the electromagnetic soft iron, the number density of the total amount of precipitates of MnS, BN, and a composite compound (MnS+BN) thereof is 5,000 particles/mm2 or more, and, in a frequency distribution of the equivalent circle diameters of the precipitates observed in an area of 0.2 mm2 or more, the mode is 50-250 nm and the proportion of those having an equivalent circle diameter of 600 nm or more is 7% or more.
Inventors:
SAEKI MICHITOSHI (JP)
IMANAMI YUTA (JP)
IMANAMI YUTA (JP)
Application Number:
PCT/JP2022/047464
Publication Date:
November 02, 2023
Filing Date:
December 22, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/06; C22C38/00; C22C38/60; H01F1/147
Foreign References:
| JP2007238970A | 2007-09-20 | |||
| JP2018076557A | 2018-05-17 | |||
| JP2001303209A | 2001-10-31 | |||
| JP2003055745A | 2003-02-26 | |||
| KR20160077523A | 2016-07-04 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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