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:
May. 13, 2003
Filed:
Nov. 27, 2000
Seiji Okabe, Okayama, JP;
Yasuyuki Hayakawa, Okayama, JP;
Takeshi Imamura, Okayama, JP;
Mitsumasa Kurosawa, Okayama, JP;
Kawasaki Steel Corporation, Hyogo, JP;
Abstract
Electrical steel sheets having superior magnetic properties, anti-noise properties, and workability, are ideal for use a compact iron core material in electric apparatuses, such as compact transformers, motors, and electric generators. A totally new electrical steel sheet and a manufacturing method therefor are proposed, in which the electrical steel sheet is not only most advantageous in magnetic properties but also advantageous from economic point of view. That is, the electrical steel sheet of the present invention is composed of from about 2.0 to 8.0 wt % Si, from about 0.005 to 3.0 wt % Mn, from about 0.0010 to 0.020 wt % Al, balance essentially iron. The magnetic flux density B (L) in a rolling direction and the magnetic flux density B (C) in the direction perpendicular thereto are 1.70 T or more, and the B (L)/B (C) is 1.005 to 1.100. In addition, the secondary recrystallized grains inclined by 20′ or less with respect to the {100}<001> orientation are present in the steel sheet at an areal ratio of 50 to 80%, and secondary recrystallized grains inclined by 20° or less with respect to the {110}<001> orientation are present in the steel sheet at an areal ratio of 6 to 20%.