MANUFACTURE OF DUAL ORIENTED SILICON STEEL SHEET EXCELLENT IN MAGNETIC PROPERTY

摘要

PURPOSE: To obtain a dual oriented silicon steel sheet having high magnetic permeability in a medium magnetic field by subjecting a silicon steel sheet contg. specified Si, Al and N to cross cold rolling, developing secondary recrystallization by the utilization of an inhibitor for the growth of the grains and providing it with a high accumulation degree in the crystalline orientation. ;CONSTITUTION: Silicon steel constituted of, by weight, 1.8 to 6.7% Si, 0.01 to 0.05% acid soluble Al and ≤0.012% N, and the balance Fe is melted. This steel is subjected to cold rolling at 40 to 80% draft and is furthermore subjected to cold rolling at 30 to 70% draft in a direction perpendicular to the same. Then, annealing is executed at 200 to 800°C at ≥10°C/min average temp. raising rate to generate primary recrystallization. Next, it is subjected to final annealing to execute secondary recrystallization and purification. Then, the objective dual oriented silicon steel sheet extremely accumulated in the {100}001 orientation is obtd.;COPYRIGHT: (C)1993,JPO&Japio