Masaki Kawano

Effect of grain orientation on magnetic properties in secondary recrystallized 3% Si steel

Abstract The influence of continuous changes in crystal orientation inside grains of grain-oriented 3% Si steel sheets on their magnetic properties was investigated. It was demonstrated that the changing rate of β (tilt angle of [001] out of the sheet plane) inside a grain is determined by the the radius of curvature ( R ) in coils at the secondary recrystallization annealing, and that the average β over the whole sheet increases as R decreases. The increase in β strongly affected the domain structure and hence the magnetic properties. A minimum iron loss was obtained at the value of R at which the average β was about 2°, even when β changed inside grains.