AL-KILLED COLD-ROLLED STEEL SHEET WITH EXCELLENT DEMAGNETIZATION CHARACTERISTICS AND PROCESS FOR PRODUCING THE SAME, AND SHADOW MASK AND COLOR TELEVISION USING THE SAME

摘要

AbstractAn Al-killed cold-rolled steel sheet with excellentdemagnetization characteristics is provided which is sub-stantially consisted of 0.005% or less C; from 0.05 to 0.50%Mn; 0.010% or less S; from 0.01 to 0.08% Sol.Al; 0.0050% orless N; wherein Mn%/S% 27 and (Sol.Al% - 0.003%)/N% ?6;and the remainder iron and inevitable impurities. A shadowmask made of such Al-killed cold-rolled steel sheet and acolor television receiver using the same exhibit a veryexcellent function. A preferred process for producing suchan Al-killed cold-rolled steel is also provided, said processbeing characterized in first obtaining a steel or a specificcomposition by the use of a vacuum degassing apparatus andthen subjecting the steel to sequential steps of hot rolling,cold rolling, decarburization-annealing, and cold rolling.