Title:
METHOD FOR PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/217604
Kind Code:
A1
Abstract:
Provided is a method for producing a non-oriented electrical steel sheet which is used as an iron core material for a motor, a transformer, and the like, and has excellent magnetic properties, the method comprising: hot-rolling a steel material which contains at most 0.005 mass% of C, 1.0-5.0 mass% of Si, 0.04-3.0 mass% of Mn, at most 0.005 mass% of sol. Al, at most 0.2 mass% of P, at most 0.005 mass% of S, and at most 0.005 mass% of N, with the balance being Fe and inevitable impurities, to obtain a hot-rolled sheet; thermally annealing the hot-rolled sheet; then performing at least two cold rolling processes, between which one cold rolling or intermediate annealing is performed, to obtain a cold-rolled sheet having a final thickness; and performing finish annealing, wherein at least one pass in the final cold rolling of the cold rolling processes is a rolling having a friction coefficient μ of at least 0.030 and a rolling reduction of at least 15%.
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Inventors:
SHIMOYAMA YUSUKE (JP)
SHINGAKI YUKIHIRO (JP)
ZAIZEN YOSHIAKI (JP)
YAMAGUCHI HIROI (JP)
SHINGAKI YUKIHIRO (JP)
ZAIZEN YOSHIAKI (JP)
YAMAGUCHI HIROI (JP)
Application Number:
PCT/JP2020/001450
Publication Date:
October 29, 2020
Filing Date:
January 17, 2020
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21B3/02; B21B1/22; C21D8/12; C22C38/00; C22C38/06; C22C38/60; H01F1/147
Domestic Patent References:
| WO2012017933A1 | 2012-02-09 |
Foreign References:
| JP2012132070A | 2012-07-12 | |||
| JP2009203520A | 2009-09-10 | |||
| JPH10294211A | 1998-11-04 | |||
| JP2002003944A | 2002-01-09 | |||
| JP2005200756A | 2005-07-28 | |||
| JP2000160248A | 2000-06-13 |
Other References:
HEO, N.H.: "Role of cold rolling texture and heating rate on final texture and magnetic induction in electrical steels", MATERIALS LETTERS, vol. 59, no. 17, 31 July 2005 (2005-07-31), pages 2170 - 2173, XP025257366, DOI: 10.1016/j.matlet.2005.02.057
YANG, H.P . ET AL.: "Through-thickness shear strain control in cold rolled silicon steel by the coupling effect of roll gap geometry and friction", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, vol. 210, no. 12, 1 September 2010 (2010-09-01), pages 1545 - 1550, XP027118262
YANG, H.P . ET AL.: "Through-thickness shear strain control in cold rolled silicon steel by the coupling effect of roll gap geometry and friction", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, vol. 210, no. 12, 1 September 2010 (2010-09-01), pages 1545 - 1550, XP027118262
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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