Method for producing non-oriented electrical steel sheet, method for producing motor core, and motor core

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United States of America Patent

PATENT NO 11104973
SERIAL NO

16483965

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Abstract

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A method of producing a non-oriented electrical steel sheet by hot rolling and cold rolling a steel slab comprising by mass % C: not more than 0.0050%, Si: 2-7%, Mn: 0.05-2.0%, P: not more than 0.2%, S: not more than 0.005%, Al: not more than 3%, N: not more than 0.005%, Ti: not more than 0.003%, Nb: not more than 0.005% and V: not more than 0.005% and then subjecting to a finish annealing and a stress-relief annealing, conditions of the finish annealing and stress-relief annealing are adjusted so that a yield stress of the steel sheet after the finish annealing is not less than 400 MPa and a ratio of a magnetic flux density B50S of the steel sheet after the stress-relief annealing to a magnetic flux density B50H after the finish annealing is not less than 0.99.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATION2-3 UCHISAIWAI-CHO 2-CHOME CHIYODA-KU TOKYO 1000011 JAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Oda, Yoshihiko Tokyo, JP 73 311
Okubo, Tomoyuki Tokyo, JP 60 176
Zaizen, Yoshiaki Tokyo, JP 54 150

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