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. 13, 2008
Filed:
Jun. 06, 2005
Yasuyuki Hayakawa, Okayama, JP;
Mitsumasa Kurosawa, Okayama, JP;
Seiji Okabe, Okayama, JP;
Takeshi Imamura, Okayama, JP;
Yasuyuki Hayakawa, Okayama, JP;
Mitsumasa Kurosawa, Okayama, JP;
Seiji Okabe, Okayama, JP;
Takeshi Imamura, Okayama, JP;
JFE Steel Corporation, , JP;
Abstract
A grain oriented electromagnetic steel sheet is free from an undercoating mainly composed of forsterite (MgSiO), excellent in processability and magnetic properties and useful to production cost, and has a composition containing, by % by mass, 2.0 to 8.0% of Si, wherein secondary recrystallized grains contains fine crystal grains having a grain diameter of 0.15 mm to 0.50 mm at a rate of 2 grains/cmor more. In the process of producing the steel sheet, inhibitors are not utilized, and the fine crystal grains are achieved by high purification and low temperature final annealing.