H - Electricity – 01 – F
Patent
H - Electricity
01
F
148/9
H01F 1/16 (2006.01) C21D 8/12 (2006.01)
Patent
CA 2284466
Similar linear or dotted line-like grooves and/or heat-affected layers that remain even after stress-relief annealing are formed on both surfaces of a grain-oriented electrical steel sheet at the exact same positions or slight deviate positions by laser irradiation. Deviation of the formation positions on both surfaces is smaller than the width of the grooves and/or the heat-affected layers in a rolling direction, and the groove depth of the grooves on both surfaces is not greater than 5% of the sheet thickness. The steel sheet can be applied to both a wound core and a stacked core, and has excellent magnetic properties capable of reducing the load on production setups.
Fujikura Masahiro
Minamida Katsuhiro
Mogi Hisashi
Sakai Tatsuhiko
Sugiyama Kimihiko
Goudreau Gage Dubuc
Nippon Steel Corporation
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