| 摘要 |
Low carbon silicon-aluminum single-oriented steel sheet having high magnetic induction is produced by hot rolling at 1370 DEG -1430 DEG C., annealing from 10 to 60 seconds at 1050 to 1170 DEG C., slow cooling to 700 DEG -900 DEG C., quenching from 700 DEG -900 DEG C., cold rolling with a reduction in thickness of 80 to 90%, recrystallization and decarburization annealing in wet hydrogen from 780 DEG to 870 DEG C. for 2 minutes, and final annealing at 1200 DEG C. in a mixture of 10-50% hydrogen and 50-90% nitrogen. Cold rolling can be effected in two stages, the first stage to reduce the thickness by 20 to 50% followed by annealing at 700 DEG to 900 DEG C., quenching and final cold rolling with a reduction in thickness of 80 to 90%. The preferred temperature range prior to quenching, for one-step cold rolling, is 750 DEG to 850 DEG C.; and for two-step cold rolling, the first quench is preferably from a temperature of 750 DEG to 850 DEG C. and the second quench preferably from a temperature of 850 DEG to 900 DEG C. |
