Low-iron-loss grain-oriented electromagnetic steel sheet and...

Details Low-iron-loss grain-oriented electromagnetic steel sheet and... Low-iron-loss grain-oriented electromagnetic steel sheet and...

C - Chemistry, Metallurgy

21

D

C21D 8/12 (2006.01) B21B 1/08 (2006.01) B21C 23/06 (2006.01) B21H 1/00 (2006.01) C21D 7/04 (2006.01)

Patent

CA 2139063

A low-iron-loss grain-oriented electromagnetic steel sheet is provided with the multiplicity of linear grooves formed in a surface thereof to extend in a direction substantially perpendicular to the direction of rolling of the steel sheet at a predetermined pitch in the direction of rolling, and a multiplicity of linear high dislocation density regions introduced to extend in a direction substantially perpendicular to the direction of rolling of the steel sheet at a predetermined pitch in the direction of rolling. The pitches 11 and 12 of the linear grooves and the high dislocation density regions, respectively, satisfy equations (1) and (2): 1 <= l1 <= 30 (mm) ........ (1) 5 <= Image × l2 <= 100 ........(2).

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