Texture annealing silicon steel

Details Texture annealing silicon steel Texture annealing silicon steel

C - Chemistry, Metallurgy

21

D

148/8

C21D 8/12 (2006.01) C22C 38/02 (2006.01) H01F 1/147 (2006.01)

Patent

CA 1123323

1084 TEXTURE ANNEALING SILICON STEEL 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 containing from 0.02 to 0.06% carbon, from 0.015 to 0.15% manganese, from 0.005 to 0.05% of material from the group consisting of sulfur and selenium, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, up to 1.0% copper,less than 0.005% antimony, less than 0.009% aluminum and from 2.5 to 4.0% silicon; casting; hot rolling; cold rolling; decarburizing; applying a refractory oxide base coating; and final texture annealing. During final texture annealing the steel is heated from a temperature of 1700°F to a temperature of 1900°F at an average rate of less than 30°F per hour, and subsequently maintained at a temperature in excess of 2000°F for a period of time sufficient to effect a purification of the steel.

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