COLD ROLLED ELECTROMAGNETIC STEEL SHEET FOR RAPID CYCLING SYNCHROTRON AND MANUFACTURING METHOD

摘要

A cold rolled electromagnetic steel sheet used for a rapid cycling synchrotron (RCS) comprises the components in wt% as follows: C:0.001-0.003%, Si:0.60-0.90%, Mn:0.40-0.70%, P�0.04%, Al:0.60-0.80%, S�0.0035%, N�0.003%, and balance Fe. A method for producing the cold rolled electromagnetic steel sheet comprises the following steps: 1) smelting and casting, in which the molten steel with the composition described above is subjected to smelting, RH refining and casting to obtain billet; 2) hot rolling; 3) normalizing, with its temperature being 960-980�� and time for 30-60s; 4) pickling and cold rolling; 5) annealing, with its temperature being 850-870�� and time for 13-15s; and 6) coating to obtain non-oriented silicon steel. The cold rolled electromagnetic steel sheet has low coercive force, high magnetic induction and low core loss.