Method of producing non-oriented electrical steel sheet

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United States of America Patent

PATENT NO 9920393
SERIAL NO

14385397

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A non-oriented electrical steel sheet having a high magnetic flux density and a low iron loss is produced by hot rolling a steel slab comprising C: not more than 0.005 mass %, Si: not more than 4 mass %, Mn: 0.03-3 mass %, Al: not more than 3 mass %, P: 0.03-0.2 mass %, S: present at not more than 0.005 mass %, N: not more than 0.005 mass %, Ca: 0.0005-0.01 mass %, provided that an atom ratio of Ca to S ((Ca mass %/40)/(S mass %/32)) is within a range of 0.5-3.5, and the balance being Fe and incidental impurities, hot band annealing, cold rolling, and then conducting recrystallization annealing by heating at an average temperature rising rate of not less than 100° C/s up to at least 740° C.

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Patent Owner(s)

  • JFE STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakanishi, Tadashi Tokyo, JP 27 156
Oda, Yoshihiko Tokyo, JP 70 256
Toda, Hiroaki Tokyo, JP 33 327
Zaizen, Yoshiaki Tokyo, JP 45 134

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