| 摘要 |
PROBLEM TO BE SOLVED: To produce a material for an inner shield capable of reducing the magnetic drift of a color picture tube and to provide a method for producing it. SOLUTION: This material for an inner shield is the one having a compsn. contg., by weight, <=0.07% C, <=0.5% Si, 0.05 to 0.8% Mn, <=0.02% S, <=0.006% N, 0.0002 to 0.02% Mg, <=0.006% Al and <=0.008% O, contg., as necessary, <=0.1% P or one or >= two kinds among Cr, Ni, Mo and W by <=0.5%, and the balance Fe with inevitable impurities. As the method for producing it, the steel slab having the above components is subjected to hot rolling under the conditions of 850 to 950 deg.C finishing temp. and 500 to 750 deg.C coiling temp., and the obtd. hot rolled steel strip is pickled, is thereafter subjected to cold rolling at a cold rolling ratio of 65 to 95%, is annealed, is subsequently subjected to skinpass rolling at an elongation percentage of <=3% and is subjected to roller levelling.
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