Ribbon-form silicon-iron alloy containing around 6% silicon

By a roller quenching method, XSi-(100-X)Fe ribbons (
6.0 \leq X \leq 7.0
) in the crystalline state were prepared. The size of them was 20 to 150μm in thickness, 2 to 25 mm in width and 5 to 10 m in length, and after annealing all of them were mechanically very soft so as to be bent 180°. In the grain structure of the as-prepared ribbons the columnar grains about 10μm in diameter were observed to grow from the surface to the middle part of the ribbon thickness. The texture of them have