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. 15, 2001
Filed:
Jun. 19, 1998
Jeffrey P. Anderson, Macedonia, OH (US);
LTV Steel Company, Inc., Cleveland, OH (US);
Abstract
A method of making electrical steel strip characterized by low core loss and high permeability in the rolling direction includes the steps of: hot rolling a slab of an electrical steel composition into a strip, hot band annealing in a temperature range effective to coarsen the grains sufficient to improve magnetic properties in a rolling direction of the strip, cold rolling, batch annealing in a temperature range effective to produce a batch annealed grain size of not greater than 40 &mgr;m and, preferably not greater than 20 &mgr;m , and temper rolling to provide the strip with a transfer surface roughness (Ra) of less than 49 &mgr;in. Electrical steel articles are manufactured from the steel strip upon final annealing. The electrical steel articles have a gain texture including a {110}<001> orientation and improved permeability in the rolling direction.