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. 07, 1992
Filed:
Jul. 09, 1990
Jerry W Schoen, Middletown, OH (US);
Armco Inc., Middletown, OH (US);
Abstract
A process of producing regular grain oriented silicon steel having a final thickness of from 7 mils (0.18 mm) to about 18 mils (0.45 mm) including the steps of providing a silicon steel hot band, removing hot band scale, cold rolling to intermediate gauge without an anneal of the hot band, performing an intermediate anneal at a soak temperature of about 1650.degree. F. (900.degree. C.) to about 1700.degree. F. (9300.degree. C.), subjecting said annealed silicon steel to a first stage slow cooling at a rate of about 500.degree. F. (260.degree. C.) to about 1050.degree. F. (585.degree. C.) per minute down to about 1100.degree. F..+-.50.degree. F. (595.degree. C..+-.30.degree. C.), thereafter subjecting said silicon steel to a second stage fast cooling down to from about 600.degree.F. (315.degree. C.) to about 1000.degree. F. (540.degree. C.) at a cooling rate of from about 25.degree. F. (1390.degree. C.) to about 3500.degree. F. (1945.degree. C.) per minute followed by a water quench, cold rolling to final gauge, decarburizing, applying an annealing separator and final annealing.