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AssigneeKawasaki Steel Corporation
InventorsSeiji Sato, Masayoshi Ishida, Kunihiro Senda, Kazuhiro Suzuki, Michiro Komatubara
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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 l.sub.1 and l.sub.2 of the linear grooves and the high dislocation density regions, respectively, satisfy equations (1) and (2): ##EQU1##
A grain-oriented electromagnetic steel sheet comprising a finish-annealed grain-oriented steel sheet, said steel sheet having a multiplicity of linear grooves formed in a surface thereof, said linear grooves extending in a direction crossing the direction of rolling of said steel sheet at a predetermined pitch in the direction of rolling, and a multiplicity of linear high dislocation density regions extending in a direction crossing the direction of rolling of said steel sheet at a predetermined pitch in the direction of rolling at positions substantially different from positions where said linear grooves are formed.
A low-iron-loss grain-oriented electromagnetic steel sheet comprising a finish-annealed grain-oriented steel sheet, said steel sheet having a multiplicity of linear grooves formed in a surface thereof, said linear grooves extending in a direction substantially perpendicular to the direction of rolling of said steel sheet at a predetermined pitch in the direction of rolling, and a multiplicity of linear high dislocation density regions extending in a direction substantially perpendicular to the direction of rolling of said steel sheet at a predetermined pitch in the direction of rolling, wherein pitch l.sub.1 (mm) of said linear grooves and pitch l.sub.2 (mm) of said high dislocation density regions satisfy equations (1) and (2):
A method of producing a low-iron-loss grain-oriented electromagnetic steel sheet comprising:
Dependencies are inferred from the claim text.