C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 8/12 (2006.01) C22C 38/02 (2006.01) H01F 1/147 (2006.01) H01F 1/18 (2006.01) C21D 3/04 (2006.01)
Patent
CA 2164466
In a grainoriented electromagnetic steel sheet exhibiting high magnetic flux density and low iron 1088, having a composition containing about 2.5 to 4.0 weight percent of Si, and about 0.005 to 0.06 weight percent of Al, and i) at least about 95 percent by area ratio of all crystal grains in the electromagnetic steel sheet are large secondary recrystallized grains each having a diameter of about 5 to 50 mm, each having an [001] axis within about 5° to the rolling direction of the sheet, and each having an [110] axis within about 5° to the normal direction of the sheet face, and ii) small grains, each having a diameter of about 0.05 to 2 mm, and each having about 2 to 30° of relative angle between the [001] axis of the small grains and the [001] axis of the large secondary crystallized grains, the small grains being located in the large secondary crystallized grains or at the grain boundaries. By adding Sb, or Sb and Mo to the steel, magnetic properties further improve.
Jfe Steel Corporation
Smart & Biggar
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