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

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

1996-04-26

1997-09-09

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428141, 428212, 428593, 428600, 156209, 156257, B32B 328

Patent

active

056654553

ABSTRACT:
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##

REFERENCES:
patent: 4063838 (1977-12-01), Michael
patent: 4996113 (1991-02-01), Hector et al.
IEEE Transactions on Magnetics, vol. 23, No. 511, Sep. 1987, New York, U.S., pp. 3074-3076, M. Nakamura et al Domain Refinement of Grain Oriented Silicon Steel by Laser Irradiation.

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