| 摘要 |
PURPOSE:To provide superior magnetic characteristics and etchability by subjecting a hot rolled steel strip as a starting material to primary cold rolling, open coil decarburization annealing, secondary cold rolling, high dew point annealing and tertiary cold rolling to form a steel sheet contg. specified amounts of C, Mn, Si, P, solAl and Cr. CONSTITUTION:A hot rolled steel strip as a starting material is subjected to primary cold rolling, open coil decarburization annealing, secondary cold rolling, high dew point annealing and tertiary cold rolling to form a steel sheet having a composition conisting of, by weight, <0.01% C, <0.2% Mn, <0.03% Si, <0.1% P, <0.05% S, 0.01-0.5% solAl, 0.01-0.5% Cr and the balance Fe with inevitable impurities. It is preferable that the hot rolled steel strip is made of continuously cast Al killed steel. |
