Low-oxygen, silicon-bearing lamination steel

Details Low-oxygen, silicon-bearing lamination steel Low-oxygen, silicon-bearing lamination steel

C - Chemistry, Metallurgy

22

C

75/152, 148/4

C22C 38/04 (2006.01) C21D 9/00 (2006.01)

Patent

CA 1040460

ABSTRACT OF THE DISCLOSURE A lamination steel of the carbon steel type for magnetic uses having a 60 hertz core loss of about 4 watts per pound at 15 kilogausses at a thickness of .025 in. if accealed after shearing or stamping and a core loss of about 4.5 watts per pound if used as sheared or stamped. The invention also relates to methods of making such steel. The steel contains from about .05% up to .60% silicon, from about .05% to 1.0% manganese, about .020% or less sulfur, from residual quantities up to about .15% phosphorus, about .008% or less nitrogen, about .02% or less oxygen, and a final carbon content of about .0105 maximum. The final carbon content may be achieved in the melt, during processing or in an anneal performed by the customer. If the steel is fully-processed, it is preferred that the carbon be removed in the melt. The lamination steel may be processed by various routings, all including hot rolling, picking and cold rolling the final gauge, to provide the customer with a fully-processed or semi-processed steel, as will be described hereinafter.

213696

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