| 摘要 |
PURPOSE:To obtain a silicon steel sheet good in magnetic properties in the rolling direction as well as in its orthogonal direction by heating a steel slab having a specified compsn. at a specified temp., thereafter subjecting it to hot rolling, executing cold rolling including process annealing to regulate its sheet thickness into a final one, subjecting it to decarburizing annealing and thereafter executing continuous annealing under specified conditions. CONSTITUTION:A steel slab constituted of, by weight, 0.010 to 0.10% C, <=4.0% Si, 0.02 to 0.10% Mn, 0.005 to 0.030% Se and/or S and the balance Fe is heated at 1150 to 1250 deg.C and is thereafter subjected to hot rolling. This steel sheet is subjected to cold rolling for one or two times including process annealing to regulate its sheet thickness into a final one, and after that, it is subjected to decarburizing annealing and is subjected to short time finish annealing at 950 to 1200 deg.C for 10 to 600s by continuous annealing. Moreover, it is enable to execute 0.5 to 5.0% cold rolling as well after the decarburizing annealing. In this way, a silicon steel sheet having a suitable amt. of inhibitor components with moderate strength and proper secondary recrystals, stable in magnetic properties and suitable as the stock for generators and large size rotating machines can be obtd. |
