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Abstract

A non-oriented silicon steel and a production method are provided. The non-oriented silicon steel is prepared by using the processes of molten iron desulfurization, converter smelting, RH refining, continuous casting, hot rolling, acid tandem rolling, annealing, coating and finishing, and a chemical composition is as follows in mass percent:

C≤0.003%, S≤0.008%, Si: 0.35%+Δ1, Mn: 0.15-0.25%, P: 0.04-0.06%, Sn: 0.015%+Δ2, Nb≤0.004%, V≤0.004%, Ti≤0.005%, Mo≤0.004%, Cr≤0.03%, Ni≤0.03%, Cu≤0.03%, N≤0.003% and the balance of Fe and inevitable inclusions. The non-oriented silicon steel has the iron loss P1.5/50≤5.5 W/kg and the magnetic induction intensity B5000≥1.75 when having the thickness of 0.5 mm, and desulfurization is not needed in the RH refining process.

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