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:
Dec. 31, 2002
Filed:
Jan. 26, 2001
Kenji Abiko, Miyagi, JP;
Japan Science and Technology Corporation, Saitama, JP;
Abstract
A hot rolled electromagnetic steel sheet having excellent magnetic properties and corrosion resistance is obtained by heating a super-high purity iron comprising Fe: not less than 99.95 mass %, C+N+S: not more than 10 mass ppm, O: not more than 50 mass ppm and the remainder being inevitable impurity to &ggr;-zone and subjecting in this &ggr;-zone to hot rolling at a total rolling reduction of not less than 50% and under condition that at least one pass is a friction coefficient between roll and rolling material of not more than 0.3 and thereafter cooling at an average cooling rate of 0.5˜150° C. over Ar transformation point ˜300° C.