Kawasaki Steel Corporation

Toshiro Fujiyama

Keiji Sakai

Michiro Komatsubara

Mitsumasa Kurosawa

Masaki Kawano

Non-oriented electromagnetic steel sheet having reduced magnetic anisotropy in high frequency region and excellent press workability

Manufacturing semiprocessed non-oriented magnetic steel sheets, which has superior workability in steps of assembling cores for motors or the like, in which improvement in productivity and higher accuracy of the products can be realized, by hot rolling a steel slab containing about 0.001 to 0.03 wt % C, about 0.1 to 1.0 wt % Si, about 0.01 to 1.0 wt % Al, about 0.05 to 1.0 wt % Mn, and about 0.001 to 0.15 wt % P, cold rolling the hot rolled sheet, continuous annealing the cold rolled sheet, and skin pass rolling the annealed sheet, wherein the average cooling rate in the continuous annealing process is about 10&deg; C./second or more and skin pass rolling is performed at a reduction rate of about 0.5 to 5% within about 20 hours after continuous annealing.

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Kurashiki, Japan

Toshiro Fujiyama