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:
Jan. 20, 1976
Filed:
Nov. 23, 1973
Takuichi Imanaka, Chiba, JA;
Takahiro Kan, Chiba, JA;
Kawasaki Steel Corporation, Kobe, JA;
Abstract
Electrical steel sheets having a very high magnetic induction are produced by a method in which an electrical steel raw material is hot rolled and annealed and subjected to at least one cold rolling and to a decarburizing annealing and a final annealing to develop the secondary recrystallized grains of (110) [001] orientation characterized in that the raw material contains less than 4.5% of Si, less than 0.06% of C, 0.005-0.100% of Sb and 0.01-0.05% of Al in the electrical steel raw material prior to the hot rolling, annealing at a temperature of 750.degree. - 1,200.degree.C depending upon the Si content before the final cold rolling, final cold rolling at a reduction rate of 40 - 89% and fully developing the secondary recrystallized grains at a temperature range of 800.degree. - 950.degree.C in the final annealing, are carried out in the above described order.