Grain oriented electrical steel sheet

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United States of America Patent

PATENT NO 9240266
APP PUB NO 20130143003A1
SERIAL NO

13814344

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Abstract

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A grain oriented electrical steel sheet has sufficiently low iron loss and having less conventionally-concerned warpage of the steel sheet even after the steel sheet is subjected to artificial magnetic domain refining treatment, where strain-introducing treatment is conducted with high energy so that an iron loss-reducing effect can be maximized. The grain oriented electrical steel sheet is obtained by adjusting tension to be applied to a tension-applying insulating coating, or to both surfaces of the steel sheet by the tension-applying insulating coating, before strain-introducing treatment in the range of Formula (1):

description='In-line Formulae' end='lead'1.0≦(tension applied to non-strain-introduced surface)/(tension applied to strain-introduced surface)≦2.0  (1),description='In-line Formulae' end='tail'

and by controlling the amount of warpage of the steel sheet toward the strain-introduced surface side after strain-introducing treatment in the range of 1 mm or more and 10 mm or less.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATIONTOKYO 100-0011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Omura, Takeshi Tokyo, JP 65 449
Takashima, Minoru Tokyo, JP 32 153
Takenaka, Masanori Tokyo, JP 31 37
Yamaguchi, Hiroi Tokyo, JP 53 254

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