Method of manufacturing low-core-loss grain oriented...

Details Method of manufacturing low-core-loss grain oriented... Method of manufacturing low-core-loss grain oriented...

C - Chemistry, Metallurgy

21

D

C21D 8/12 (2006.01) C21D 3/04 (2006.01) C23F 1/02 (2006.01)

Patent

CA 2045701

A method of manufacturing a low-core-loss grain oriented electrical steel sheet. Thread-like grooves are formed in a cold-rolled grain oriented electrical steel sheet having a final thickness of about 0.27 mm or less in a direction within the range of about 30° from the direction perpendicular to the rolling direction. The grooves and sheet satisfy the equation log d 0.6 Ra + 0.4 where d is the groove depth (µm), and Ra is the mean surface roughness of the steel sheet cold-rolled to final gauge. The steel sheet is thereafter decarburization annealed and final texture annealed.

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