ORIENTED ELECTRIC STEEL SHEET WITH GOOD MAGNETIC PROPERTY AND PREPARATION METHOD THEREOF

摘要

PURPOSE: An oriented electric steel sheet used as an iron core of a transformer and its preparation method are provided, to improve the magnetic property and to allow the steel sheet to be produced stably. CONSTITUTION: The oriented electric steel sheet comprises 0.02-0.1 wt% of C; 1.0-4.8 wt% of Si; 0.006 wt% of S or less; 0.01-0.05 wt% of acid-soluble Al; 0.05-0.2 wt% of Mn; 0.005 wt% of N or less; 0.015-0.05 wt% of Zr or 0.015-0.07 wt% of Ce; and the balance of Fe and inevitable impurities. The method comprises the steps of hot rolling the steel sheet composition at a temperature of 1,200-1,300 deg.C; hot annealing and cool rolling the obtained steel sheet; carrying out the decarburization and nitrification annealing of the steel sheet to decarburize and nitride it and to form AlN; and high temperature annealing the steel sheet by using AlN as a primary recrystallization inhibitor.