| 摘要 |
<p>PURPOSE:To obtain a grain-oriented silicon steel sheet in which secondary recrystallization is stably revealed and extremely excellent in magnetic characteristics such as magnetic flux density and core loss. CONSTITUTION:In a method for manufacturing a magnetic steel sheet in which the slab of a magnetic steel sheet is heated to <=1200 deg.C and is thereafter hot- rolled, and hog-rolling is kept as it is or annealing for the hot rolled sheet is applied, it is subjected to cold rolling for one time or >=two times including intermediate annealing. Then, the steel sheet is subjected to decarburization and nitriding treatment to form an inhibitor, and thereafter, finish annealing is executed, the relationship between the value of core loss after the decarburizing annealing and that after the finish annealing is previously determined by the sheet thickness of the steel sheet, the components to be added and atmospheric conditions in the finish annealing, then, the value of the core loss after the decarburizing annealing is measured, the measured value is extrapolated in the above-mentioned relationship and the sheet temp. at the time of the decarburizing annealing before the nitriding treatment is regulated so that the value of the core loss after the finish annealing is optimum.</p> |
