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:
Apr. 01, 1986
Filed:
Dec. 01, 1983
Applicant:
Inventors:
Yoh Shimizu, Chiba, JP;
Hiroshi Shishido, Chiba, JP;
Yo Ito, Chiba, JP;
Hiroshi Shimanaka, Funabashi, JP;
Assignee:
Kawasaki Steel Corporation, Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148111 ; 148113 ; 148 315 ; 148 3155 ;
Abstract
Grain oriented silicon steel sheets having a very low iron loss W.sub.17/50 of lower than 0.90 W/kg, in which Si content is 2-4%, are produced by containing at least one of Se and S in an amount of 0.010-0.035% and at least one of Sb, As, Bi and Sn in an amount of 0.010-0.080% as inhibitor, making a final gauge to be 0.15-0.25 mm, forsterite coating formed on the steel sheet surfaces in the final annealing to be 1-4 g/m.sup.2 per one surface and a secondary crystallized grain size to be 1-6 mm.