| 摘要 |
PURPOSE:To manufacture the titled steel sheet, by hot rolling silicon steel slab having a specified compsn. under a specified condition, next applying at least >=one time cold rolling to the plate up to final thickness, decarburization annealing, then the final annealing to the sheet. CONSTITUTION:Silicon steel slab contains, by wt%, 0.01-0.06 C, 3.1-4.5 Si, 0.01-0.2 Mn, 0.003-0.1 Mo, 0.005-0.2 Sb, 0.005-0.1 one or two kinds of S, Se. In the course where the slab is subjected to 5-40% draft at 900-1,250 deg.C, compd. contg. Mo is adhered on surface of material to be rolled to form the layer in which concn. of Mo is raised near the surface, then the slab is reheated to >=1,270 deg.C and the final hot rolling is proceeded again. Next, at least >=one time cold rolling is applied to the plate up to final thickness, then decarburization annealing, next the final annealing are applied. |
