The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 1997
Filed:
Dec. 05, 1995
Yukio Inokuti, Chiba, JP;
Kawasaki Steel Corporation, , JP;
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 having a diameter of about 5 to 50 mm, each having an �001! axis within about 5.degree. to the rolling direction of the sheet, and each having an �110! axis within about 5.degree. 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.degree. to 30.degree. 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.