| 摘要 |
PURPOSE:To provide means for realizing a product excellent in magnetic properties in the method for manufacturing a grain-oriented electrical steel sheet. CONSTITUTION:In the method for manufacturing a grain-oriented electrical steel sheet in which the slab of a grain-oriented electrical steel sheet is heated at <=1280 deg.C, is subjected to hot rolling, is, as it is or after hot rolled sheet annealing, subjected to cold rolling for one time or >= two times including process annealing, is next subjected to decarburization and nitriding treatment to form an inhibitor and is thereafter subjected to finish annealing, by measuring the nitrided amt. of the steel sheet at the time of the nitriding treatment and the value of core loss after its discharge from a furnace, the size of primarily recrystallized grains is estimated, and annealing conditions are regulated so that the size of the primarily recrystallized grains will lie in the optimum range. |
