C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
148/8
C22C 38/02 (2006.01) C21D 8/12 (2006.01) C23C 24/00 (2006.01) H01F 1/04 (2006.01)
Patent
CA 1055368
PROCESSING FOR HIGH PERMEABILITY SILICON STEEL ABSTRACT OF THE DISCLOSURE A process for producing silicon steel having a cube-on-edge orientation and a permeability of at least 1850 (G/Oe) at 10 oersteds, which includes the steps of: preparing a melt of steel consisting essentially of, by weight, up to 0.07% carbon, from 2.6 to 4.0% silicon, from 0.03 to 0.24% manganese, from 0.01 to 0.097% of material from the group consisting of sulfur and selenium, from 0.015 to 0.04% aluminum, up to 0.02% nitrogen, up to 0.5% copper, up to 0.0035% boron, balance iron; casting the steel, hot rolling the steel, cold rolling the steel, decarburizing the steel, coating the steel with a base coating containing a nitrogen-bearing compound from the group consisting of (NH4)2SO4, Fe(NO3)3, Al(NO3)3,Mg(NO3)2 and Zn(NO3)2, and final texture annealing the steel.
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