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. 05, 1981
Filed:
Feb. 07, 1979
Richard D Blaugher, Churchill Boro, PA (US);
Richard H Hopkins, Monroeville, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
This is a method of producing grain-oriented, iron sheet for electrical applications. The process utilizes relatively pure iron which is deoxidized to have less than 50 ppm of oxygen. The carbon content is adjusted to 0.01-0.02 wt. % (preferably 0.010-0.015 wt. %). The material is hot rolled at a temperature of at least 800.degree. C., cold rolled with a 60-75% reduction, recrystallized in an non-oxidizing atmosphere at 700.degree.-820.degree. C., cold rolled a second time with a 60-75% reduction, annealed at 700.degree.-825.degree. C. in a non-oxidizing atmosphere and cold rolled a third time with a 60-75% reduction and final annealed at 850.degree.-900.degree. C. for 50-200 hours in a reducing atmosphere.