Processing for electromagnetic silicon steel

Details Processing for electromagnetic silicon steel Processing for electromagnetic silicon steel

C - Chemistry, Metallurgy

21

D

148/8

C21D 8/12 (2006.01) C21D 3/04 (2006.01) C22C 38/02 (2006.01)

Patent

CA 1127511

ABSTRACT OF THE DISCLOSURE A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The process includes the steps of: preparing a melt of silicon steel having up to 0.07% carbon, from 0.01 to 0.25% manganese, from 0.01 to 0.09% of material from the group consisting of sulfur and selenium, from 2.5 to 4.0% silicon, up to 1.0% copper, less than 0.009% aluminum and less then 0.0006% boron; casting the steel; hot rolling the steel; cold rolling the steel; normalizing the steel in a hydrogen-bearing atmosphere having a PH2O/pH2 of from 0.015 to 0.3; applying a refractory oxide coating containing an oxide less stable than SiO2 at temperatures up to 2150°F; and final texture annealing the steel.

323588

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