Application of artificial domain control

Abstract

Artificial domain control has been applied to grain oriented Si-Fe. Lines are scribed on the surface of the sheet by a ball with 1.0 mm diameter, on one side of sheet surface. Directions of scribing are cross grain, with grain, and 10 °, 20 °, 30 °, 45 °, 60 ° from the rolling direction. Spacing of lines is 10mm. Scribing produces slight plastic deformation at the surface of the sheet. Scribing in the cross grain direction reduced total loss in the rolling direction, 7% at a flux density of 1.7 Tesla. Scribing in the cross grain direction causes refinement of 180 ° domains which are the primary structure in (110) [001] oriented Si-Fe. Scribing in the with grain direction improves the total loss in the cross grain direction. Scribing 30 ° to 60 ° to the with grain improves the total losses in both the grain and cross grain direction. The improvement in total loss by scribing may be caused by slight local plastic deformation. Heat treatment, which causes recovery, cancels the effect of scribing.

Grain Boundary Characteristics in Grain Oriented Silicon Steel

“…The specimens, which were decarburized and primary-recrystallized, were prepared from commercial production. 18,19) The main inhibitors are finely dispersed AlN and MnS. It was cold-rolled to a thickness of 0.285 mm with a reduction of 87.6 %.…”

Core loss reduction by laser scribing in grain-oriented 3% Si-Fe under different magnetizing direction

“…For parallel and perpendicular samples, the reductions of core loss are 5.7% and 30.3% by laser scribing at the magnetic induction 1.3 T and magnetizing frequency 60 Hz. The reductions originated in the refinement of magnetic domain walls [4].…”

Influence of Primary Recrystallization Texture through Thickness to Secondary Texture on Grain Oriented Silicon Steel.

“…Table 1 shows the chemical composition of the specimens. The specimens, which were decarburized and primary-recrystallized, were prepared from ordinary commercial production 22) of inherent inhibitor method, the main inhibitors being finely dispersed AlN and MnS. The thickness was 0.285 mm with cold rolling reduction of 87.6 %.…”