NEW PRODUCTION METHOD OF 100-MU-M-THICK GRAIN-ORIENTED 3-PERCENT SILICON STEEL SHEETS

We report a new method of preparing highly oriented 3% silicon steel s heets with a thickness of 100 mu m, which enables us to realize the ma ss production with existing manufacturing facility. In our new method, a hot-rolled silicon steel is thinned to 100 mu m by a three-step rol ling process with intermediate annealings and the (110)[001] is create d by the final annealing taking advantage of surface energy. The obtai ned 100-mu m-thick sheets had the Goss texture and superior soft magne tic properties (the magnetic induction at 800 A/m, B-8 is approximatel y equal to 1.9 T, the coercive force <4 A/m). In addition, the iron lo ss W 15/50 at 1.5 T, 50 Hz under the applied tensile strength of 2 kg/ mm(2) was 0.53 W/kg. This value is less than that of the conventional (300 mu m) grain-oriented silicon steels by about 37%. (C) 1997 Americ an Institute of Physics.