Fe-Ni BASED ALLOY FOR SEMI-TENSION MASK EXCELLENT IN MAGNETIC CHARACTERISTICS, AND SEMI-TENSION MASK AND COLOR CATHODE-RAY TUBE USING THE SAME

摘要

This invention provides, as a means of securing magnetic shield properties for a semi-tension mask and precluding color irregularity or mislanding on the phosphor due to beam drift, a Fe-Ni alloy for semi-tension mask comprising, in mass percentage (%), from 34 to 45% Ni, from 0.01 to 0.5% Mn, and the balance Fe and unavoidable impurities, said alloy being such that a sheet obtained after final cold rolling has an alpha (111)+(220), said sum of the X-ray intensity ratio of (111) plane and (220) plane in the rolled surface represented by Formula 1 <DF> alpha (111)+(220) = I(111)+I(220) DIVIDED I(111)+I(200)+I(220)+I(311) x100 (%) </DF> of no less than 15%. The invention also provides a semi-tension mask of the alloy, and a color picture tube using the semi-tension mask. <IMAGE>