| 摘要 |
PURPOSE:To stably manufacture the titled sheet, by hot rolling silicon steel slab contg. specified quantities of Mo, Sb, then applying intermediate annealing, decarburization primary annealing and cold rolling at two times under specified conditions contg. high temp. finish annealing. CONSTITUTION:Silicon steel slab contg. by weight 3.1-4.5% Si, 0.003-0.1% Mo, 0.005-0.2% Sb, 0.005-0.06% acid soluble Al, and 0.005-0.1% total of one kind or both in S and Se is hot rolled. Next, the plate is primarily cold rolled by 10-60% draft, then the sheet is intermediately annealed at 500-900 deg.C range by >=5 deg.C/sec rates in both heating and cooling, then secondarily cold rolled by 75-90% draft to finish to thin steel sheet of 0.1-0.25mm final thickness. Successively, decarburization primary recrystallization annealing and high temp. finish annealing are applied. In this case, treatment for forming anisotropic small area on surface of silicon steel sheet after high temp. finish annealing is applied at primary recrystallization annealing or after high temp. finish annealing to manufacture the titled sheet. |
