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Title:
NONORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2024/080140
Kind Code:
A1
Abstract:
Provided is a nonoriented electromagnetic steel sheet that achieves both fine magnetic properties and punch-out workability. Further, proposed is a method for manufacturing the nonoriented electromagnetic steel sheet. This nonoriented electromagnetic steel sheet has a component composition containing, in mass%, not more than 0.0050% of C, 2.0-5.0% of Si, 0.2-1.8% of Mn, not more than 0.020% of P, not more than 0.0050% of S, 0.25-2.00% of Al, more than 0.0030% but not more than 0.0150% of N, not more than 0.0050% of O, and 0.01-0.10% of one of or the total of the two of Sn and Sb, the remaining portion being Fe and unavoidable impurities. The number of AlN particles having a particle size not less than 0.8 μm existing in a sheet thickness cross section of the steel sheet in the rolling direction is 10 particles or more per 1 mm2. In this method for manufacturing a nonoriented electromagnetic steel sheet, the heating of a slab is performed using a heat initiation temperature of 300°C or higher and a heating temperature of 1100-1300°C. The annealing temperature of a hot-rolled sheet is set to 800-950°C and the annealing temperature for the finish annealing is set to 850-1050°C.

More Like This:
WO/2023/121274GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
JP5750196Non-oriented electrical steel strips or sheets, parts manufactured from them, and methods for manufacturing non-oriented electrical steel strips or sheets.
Inventors:
SAITO HAYATO (JP)
OKUBO TOMOYUKI (JP)
SUEHIRO RYUICHI (JP)
MARUYAMA SHIGEHIRO (JP)
Application Number:
PCT/JP2023/035057
Publication Date:
April 18, 2024
Filing Date:
September 27, 2023
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147
Foreign References:
JP2017179485A2017-10-05
JP2013044010A2013-03-04
JPH10158739A1998-06-16
JP2000045040A2000-02-15
JP2008045151A2008-02-28
JP2022509676A2022-01-21
KR20210080714A2021-07-01
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
Download PDF:
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