THE GRAIN-ORIENTED ELECTRICAL STEEL SHEETS OF AN ELLIPTICAL TYPE OF HOT BAND ANNEALING HEAT TREATMENT WITH HIGH MAGNETIC PROPERTY AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A grain-oriented electrical steel sheet with superior magnetic property and a manufacturing method thereof are provided to achieve uniform hot rolled organization and precipitate through control of rolling process and exclude hot band annealing. CONSTITUTION: A manufacturing method of a grain-oriented electrical steel sheet with superior magnetic property is as follows. A slab for an electric steel sheet is heated again, hot rolled and then coiled. The hot rolled steel sheet is cold rolled into the final thickness, omitting hot-rolled annealing. Primary and secondary recrystallization annealing are carried out with a deformation rate of hot rolling 0.2~0.9.