Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Susumu Mukawa

Kazutoshi Takeda

Takuya Matsumoto

Masafumi Miyazaki

Koji Fujita

Yoshiaki Natori

Takashi Morohoshi

Hiroyoshi Yashiki

Norio Omura

Wataru Sakai

Tadashi Imai

Okitomo Kunitake

A non-oriented electrical steel sheet according to an aspect of the present invention contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.2% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, one or more of La, Ce, Pr, and Nd: 0.0005% to 0.0200% in total, Ca: 0.0005% to 0.0100%, Ti: 0.0005% to 0.0100%, Sn: 0% to 0.10%, Sb: 0% to 0.10%, Mg: 0% to 0.0100%, and a remainder including Fe and impurities, in which Si&#x2212;0.5&#xd7;Mn: 2.0% or more, and Si+0.5&#xd7;Mn: 3.8% or more.

Non-oriented electrical steel sheet

A non-oriented electrical steel sheet contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.0% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, O: 0.0110% to 0.0350%, Sn: 0% to 0.050%, Sb: 0% to 0.050%, Ti: more than 0% and 0.0050% or less, and a remainder including Fe and impurities, in which Sn+Sb: 0.050% or less, Si&#x2212;0.5&#xd7;Mn: 2.0% or more, and an O content in a sheet thickness central portion excluding a surface layer portion which is a range from a front surface and a rear surface to a position of 10 &#x3bc;m in a depth direction is less than 0.0100%.

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

Method for refining molten steel and apparatus therefor

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Tokyo, Japan

Susumu Mukawa