Non-oriented electrical steel sheet and method for manufacturing non-oriented electrical steel sheet

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United States of America Patent

PATENT NO 11114227
APP PUB NO 20190189318A1
SERIAL NO

16065352

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A non-oriented electrical steel sheet has low iron loss even under inverter excitation and can be suitably used as the iron core of a motor. The non-oriented electrical steel sheet has a specific chemical composition and an average grain size r of 40 μm to 120 μm. An area ratio R of a total area of grains having a grain size of ⅙ or less of the thickness of the steel sheet to a cross-sectional area of the steel sheet is 2% or greater, and the average grain size r (μm) and the area ratio R (%) satisfy a condition represented by Expression (1), R>−2.4×r+200 (1).

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Patent Owner(s)

  • JFE STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Omura, Takeshi Tokyo, JP 57 430
Senda, Kunihiro Tokyo, JP 50 203
Uesaka, Masanori Tokyo, JP 32 65

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