NONORIENTED SILICON STEEL SHEET HAVING HIGH MAGNETIC FLUX DENSITY AND EXCELLENT IN WORKABILITY, RECYCLABILITY AND MAGNETIC PROPERTY AFTER STRAIN RELIEVING ANNEALING

摘要

PROBLEM TO BE SOLVED: To provide a nonoriented silicon steel sheet excellent in workability and recyclability, and further in magnetic properties after strain relieving annealing.;SOLUTION: The steel sheet has a composition containing, by mass, 1.5-4.0% Si and 0.005-2.00% Mn, also containing Al, C and N in amounts reduced, by mass, to ≤0.030%, ≤0.0020% and ≤0.0020%, respectively, and having the balance Fe with inevitable impurities. Further, as to the magnetic properties, the steel sheet has core loss W15/50 and magnetic flux density B50 satisfying the following ranges: W15/50≤3.20 W/kg and B50≥(1.650+0.025×W15/50)T.;COPYRIGHT: (C)2001,JPO