H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 1/16 (2006.01) C21D 8/12 (2006.01) H01F 1/18 (2006.01) H01F 1/34 (2006.01)
Patent
CA 2081235
A low-iron loss grain oriented electromagnetic steel sheet subjected to final finishing annealing has a plurality of linear grooves formed on the ferrite surface of the steel sheet in a direction across the rolling direction, so as to improve the magnetic: characteristics of the steel sheet. The linear grooves have a substantially rectangular cross-sectional shape in which the angle of a groove side wall to the direction of the thickness of the sheet is about 60° or less. Projections are present at a bottom portion of the groove, and the depth at the top of the projection at the groove bottom is at least about 1/2 of the maximum groove depth. The steel sheet maintains a low iron loss even after stress relief annealing. The present invention provides a method of stably producing the steel sheet.
Fukuda Bunjiro
Nakano Koh
Sato Keiji
Kawasaki Steel Corporation
Smart & Biggar
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