| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel sheet for cathode-ray tube band, capable of being easily manufactured and having high strength and high magnetic permeability. SOLUTION: A steel slab, which has a composition containing 0.005-0.06% C, 0.05-1.5% Mn, <=0.02% S, 0.019-0.15% Al, and <=0.005% N and also containing, if necessary, either or both of <=0.9% Si and <=0.15% P, is hot rolled. The resultant steel plate is subjected to primary cold rolling at >=60% cold rolling rate, to primary annealing, and to secondary cold rolling at 5-60% cold rolling rate, followed by continuous annealing at 720-900 deg.C. The resultant steel sheet is used as a solid material or as a plated steel sheet prepared by the application of electroplating with Zn, Ni, Cr, or alloys thereof to improve corrosion resistance. It is preferable to coil the hot rolled steel strip at 500-700 deg.C at hot rolling. Moreover, the continuously annealed steel sheet or the continuously annealed and electroplated steel sheet can be subjected to temper rolling at <=2.5% elongation percentage and then to roller leveling at <=2.0% elongation percentage at sheet surface.
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