NONORIENTED SILICON STEEL SHEET MINIMAL IN MAGNETIC ANISOTROPY IN HIGH FREQUENCY REGION AND EXCELLENT IN PRESS WORKABILITY

摘要

PROBLEM TO BE SOLVED: To provide a nonoriented silicon steel sheet minimal in magnetic anisotropy in high frequency region and accordingly excellent in motor characteristic and press workability. SOLUTION: The composition of the nonoriented silicon steel sheet is regulated to a prescribed range. Further, with respect to the measured value of magnetic properties using an Epstein test piece, the relations of the following inequalities are satisfied: B50(L+C)=0.03.W15/50(L+C) +1.63...(1); W10/400(D)/W10/400(L+ C)=1.2...(2); Hv1=-83.3.W15/50(L+C)+380 (when thickness is 0.35 mm0.02 mm)...(3); and Hv1=-63.6.W15/50(L+C)+360 (when thickness is 0.50 mm0.02 mm)...(4).