| 摘要 |
PURPOSE:To produce a grain-oriented silicon steel sheet showing a mirror face, i.e., extremely low in core loss at a low cost. CONSTITUTION:A nonhydrating oxide is used as a separation agent for annealing in finish annealing and the total (wt.%) of alkali metal impurities in the separation agent for annealing: [A] is allowed to satisfy the following condition to the oxygen content (g/m<2>) per side of the decarburized and annealed sheet: [O]:[A]>0.2X[O].. Thus, the grain-oriented silicon steel sheet free from the remaining or formation of precipitates immediately below the surface layer of the steel sheet after the finish annealing and showing a mirror face, i.e., low in core loss can be produced. |
