High-silicon steel sheet and method of manufacturing the same

A high-silicon steel sheet having

• a chemical composition containing, by mass %, C:
• 0.02% or less, P:
• 0.02% or less, Si:
• 4.5% or more and 7.0% or less, Mn:
• 0.01% or more and 1.0% or less, Al:
• 1.0% or less, O:
• 0.01% or less, N:
• 0.01% or less, and the balance being Fe and inevitable impurities,
• a grain-boundary oxygen concentration comprising oxygen concentration with respect to chemical elements segregated at grain boundaries of 30 at % or less, and
• a microstructure in which a degree of integration P(211) of a {211}-plane of α-Fe on a surface of the steel sheet is 15% or more,
• wherein, a degree of integration P(hkl) of each crystal plane is defined by equation (1) on a basis of integrated intensities of various peaks obtained by using an X-ray diffraction method:
• P(211)=p(211)/S×100(%) (1)
• wherein
• S=p(110)/100+p(200)/14.93+p(211)/25.88+p(310)/7.68+p(222)/1.59+p(321)/6.27+p(411)/1.55, and
• wherein
• p(hkl):
• integrated intensity of a peak of X-ray diffraction of an {hkl}-plane.