The manufacture process of sheet of high silicon steel 0.02C
6.56Si
0. 14Mn
0.013P
0.004S
0.02Al was melting by 25 kg vacuum induction furnace
forging breakdown
hot rolling to 1mm at 1050~850 ℃
warm rolling to 0.3 mm at 650℃
and cold rolling to 0.05 mm.The non-oriented silicon steel was got by vacuum annealing of the cold rolled sheet at 1200 ℃ for1.5 h. Compared with conventional oriented silicon steel
the iron loss of high silicon steel sheet decreased by 14.7% with0.07 Tand 20 kHz
by 19.7% with 30 kHzand by 28. 1% with 40 kHz
it is an excellent soft magnetic material. The tensile strength of the steel sheet cold rolled was up to 1480 MPa.