发明公开
EP2460902A1 GRAIN-ORIENTED MAGNETIC STEEL SHEET 有权
KORNORIENTIERTES MAGNETSTAHLBLECH

GRAIN-ORIENTED MAGNETIC STEEL SHEET
摘要:
An electrical steel sheet is provided that contains, as components, by mass%, 0.005% or less of C, 1.0% to 8.0% of Si, and 0.005% to 1.0% of Mn; one or more selected from Nb, Ta, V, and Zr such that a total content thereof is 10 to 50 ppm; and the balance being Fe and unavoidable impurities, wherein at least 10% of the content of Nb, Ta, V, and Zr is in the form of precipitates; the precipitates have an average diameter (equivalent circle diameter) of 0.02 to 3 µm; and secondary recrystallized grains of the steel sheet have an average grain size of 5 mm or more. Thus, an electrical steel sheet is provided in which degradation of magnetic characteristics can be reduced in the case of the sheet being sheared, even when the sheet is used for a large transformer having a size of several meters.
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