Non-oriented electrical steel sheet, manufacturing method thereof, laminate for motor iron core, and manufacturing method thereof

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United States of America Patent

PATENT NO 9721706
SERIAL NO

13982691

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Abstract

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A value of a parameter Q represented by “Q=([Ti]/48+[V]/51+[Zr]/91+[Nb]/93)/([C]/12)” is not less than 0.9 nor more than 1.1, when contents of Ti, V, Zr, Nb, and C (mass %) are represented as [Ti], [V], [Zr], [Nb], and [C] respectively. A matrix of a metal structure is a ferrite phase, and the metal structure does not contain a non-recrystallized structure. An average grain size of ferrite grains constituting the ferrite phase is not less than 30 μm nor more than 200 μm. A precipitate containing at least one selected from the group consisting of Ti, V, Zr, and Nb exists with a density of 1 particle/μm3 or more in the ferrite grain. An average grain size of the precipitate is not less than 0.002 μm nor more than 0.2 μm.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Atake, Makoto Tokyo, JP 6 23
Fujikura, Masahiro Tokyo, JP 22 78
Hori, Kojiro Tokyo, JP 4 14
Ichie, Takeru Tokyo, JP 14 20
Kanao, Shinichi Tokyo, JP 7 31
Matsui, Shinichi Tokyo, JP 66 1028
Murakawa, Tesshu Tokyo, JP 28 33
Ushigami, Yoshiyuki Tokyo, JP 83 295

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