Nippon Steel Corporation

Takeo Aramaki

Satoshi Arai

Kazutoshi Takeda

Kenichi Murakami

Hideyuki Hamamura

Masato Yasuda

Takashi Kataoka

Shinya Yano

Yoshihiro Arita

Hirotoshi Tada

A grain-oriented electrical steel sheet comprises a base steel sheet and a glass coating that is formed on the surface of the base steel sheet, and is characterized in that: the base steel sheet contains as chemical components, in mass %, 0.010% or less of C, from 2.00% to 4.00% of Si, from 0.05% to 1.00% of Mn, from 0.010% to 0.065% of Al, 0.004% or less of N and 0.010% or less of S, with the balance of Fe and impurities, wherein the oxygen concentration in the glass coating and the base steel sheet is 2,500 ppm or less; and if Iis the first peak intensity of Al and Iis the second peak intensity of Al in the concentration profile of Al, the relationship of mathematical formula (1) I<Iis satisfied.

Grain-oriented electrical steel sheet

This grain-oriented electrical steel sheet includes a base steel sheet, a forsterite-based primary film disposed on a surface of the base steel sheet, and a phosphate-based tension-imparting film containing no chromium, which is disposed on a surface of the primary film. In a case where a Ti content and a S content are respectively expressed as XTi and XS, by mass %, the forsterite-based primary film satisfies Expression (1) and Expression (2). A strain-introduced magnetic domain control is performed on the grain-oriented electrical steel sheet0.10≤XTi/XS≤10.00  Expression (1)XTi+XS≥0.10 mass %.  Expression (2)

Grain-oriented electrical steel sheet and method for manufacturing same

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Tokyo, Japan

Takeo Aramaki