| 摘要 |
PURPOSE: A directional electrical sheet is prepared which has an improved magnetic property, decarbonization and productivity. CONSTITUTION: A silicon steel comprises 2.9-3.3 wt.% of silica, 0.035-0.055 wt.% of carbon, less than 0.015 wt.% of phosphor, 0.010-0.027 wt.% of acid-soluble aluminum, 0.0080-0.012 wt.% of nitrogen, less than 0.007 wt.% of sulfur, 0.10- 0.45 wt.% of manganese, 0.10-0.60 wt.% of copper, remainder of feruum and impurities. The slab is hot-rolled at 1,250-1,330°C, annealed at 1,50-1,150°C and pickled. Obtained slab is decarbonized and annealed at 750-830°C, coated by MgO antiseize compound and annealed to give the directional electrical sheet.
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