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Abstract

A continuous steel casting process adapted to produce steel castings of satisfactory quality with less center segregations is described. A molten steel is electromagnetically stirred in at least two of three locations, viz., a casting mold and intermediate and final solidifying zones of a continuously cast strand. In the casting mold, is applied a magnetic field induced by alternate current of a frequency f=1.5.about.10 Hz and having G in the range of 195.times.e.sup.-0.18f .about.1790.times.e.sup.-0.2f at the inner surface of the casting mold. The intermediate solidifying zone employs a magnetic field induced by alternate current of a frequency f=1.5.about.10 Hz and having a magnetic flux density G in the range of 195.times.e.sup.-0.18f .about.1790.times.e.sup.-0.2f at the surface of the strand or a magnetic field induced by alternate current of a frequency f=50.about.60 Hz and having a magnetic flux density G in the range of 0.6.times.10.sup.6 /(D-107).sup.2 .about.1.8.times.10.sup.6 /(D-100).sup.2 (in which D=the thickness of a solidified shell layer of the strand) at the surface of the strand. For electromagnetic stirring in the final solidifying zone, a magnetic field induced by alternate current of a frequency f=1.5.about.10 Hz and having a magnetic flux density in the range of 895.times.e.sup.-0.2f .about.2137.times.e.sup.-0.2f is applied.

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