MANUFACTURING METHOD FOR NON-ORIENTED MAGNETIC STEEL SHEET

WIPO Patent Application WO/2020/111006

A1

The present invention makes it possible to stably improve a magnetic flux density by utilizing induction heating and radiation heating at a time of finish annealing for a non-oriented magnetic steel sheet. Provided is a manufacturing method for a non-oriented magnetic steel sheet, in which a slab having an adjusted predetermined component composition is hot-rolled, a hot-rolled sheet annealing is performed or not performed, cold rolling is performed one time, or cold rolling is performed two or more times with intermediate annealing performed therebetween, and then finish annealing is performed. In the manufacturing method, a recrystallization rate of a material before final cold rolling is set to be less than 80%, and {100}<011> intensity in a 1/4 layer of the material is set be equal to or less than 8. In the finish annealing, an average heating velocity at 600 to 720ºC is set to be equal to or more than 50ºC/s, and an average heating velocity at 720 to 760ºC is set to be equal to or more than 5ºC/s.

OKUBO TOMOYUKI (JP)
UESAKA MASANORI (JP)
ZAIZEN YOSHIAKI (JP)
ODA YOSHIHIKO (JP)

PCT/JP2019/046005

June 04, 2020

November 25, 2019

Click for automatic bibliography generation  

JFE STEEL CORP (JP)

B21B3/02; C21D8/12; C21D9/46; H01F1/147; C22C38/00; C22C38/14; C22C38/60

JP2017101315A	2017-06-08
JP2018145492A	2018-09-20
JPH0841542A	1996-02-13
JPH06228644A	1994-08-16
CN107245564A	2017-10-13
KR20150073801A	2015-07-01
JPH01290716A	1989-11-22
JPH0211728A	1990-01-16
JP2011256437A	2011-12-22
JP2012132070A	2012-07-12
JP2017106073A	2017-06-15

See also references of EP 3888808A4

SUGIMURA Kenji (JP)

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