METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Title:

METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

Document Type and Number:

WIPO Patent Application WO/2018/084203

Kind Code:

A1

Abstract:

The present invention makes it possible to stably achieve excellent magnetic characteristics of grain-oriented electrical steel sheets produced from thin slabs without using inhibitor forming components. This method for producing a grain-oriented electrical steel sheet comprises: forming a slab having a thickness of 25-100 mm produced from continuous casting using molten steel having a component composition containing, on a mass basis, 0.002-0.100% of C, 2.00-8.00% of Si, and 0.005-1.000% of Mn and in which Al, N, S, and Se are restricted to less than 0.0100%, less than 0.0050%, less than 0.0050%, and less than 0.0050%, respectively, and the remainder consists of Fe and inevitable impurities; and heating and then hot rolling the slab into a hot rolled steel sheet. In the step of heating the slab, the temperature is set to 1000-1300ºC, the time period is set to 10-600 seconds, and hot rolling is started within 30 seconds after heating.

Inventors:

TAKENAKA MASANORI (JP)
IMAMURA TAKESHI (JP)
EHASHI YUIKO (JP)
YAMAGUCHI HIROI (JP)

Application Number:

PCT/JP2017/039617

Publication Date:

May 11, 2018

Filing Date:

November 01, 2017

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

C21D8/12; C21D9/46; C22C38/00; C22C38/60; H01F1/147

Foreign References:

JP2001303214A	2001-10-31
JP2000129354A	2000-05-09
JP2008069391A	2008-03-27
JP2005146295A	2005-06-09
JPH05105956A	1993-04-27
JP2013512332A	2013-04-11
US20120018049A1	2012-01-26

Other References: