High magnetic density, low iron loss, grain oriented electromagn

Details High magnetic density, low iron loss, grain oriented electromagn High magnetic density, low iron loss, grain oriented electromagn

1995-12-05

1997-12-30

Sheehan, John

Metal treatment

Stock

Magnetic

420117, H01F 1147

Patent

active

057025410

ABSTRACT:
In a grain oriented electromagnetic steel sheet exhibiting high magnetic flux density and low iron loss, 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 about 5.degree. to the rolling direction of the sheet, and each having an face, and
ii) small grains, each having a diameter of about 0.05 to 2 mm, and each 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.

REFERENCES:
patent: 4581080 (1986-04-01), Meguro et al.

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