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:
Mar. 11, 2008
Filed:
Dec. 06, 2002
Ken Kimura, Futtsu, JP;
Masao Kikuchi, Tokyo, JP;
Masayuki Tendo, Tokyo, JP;
Junichi Hamada, Hikari, JP;
Satoshi Akamatsu, Futtsu, JP;
Ken Kimura, Futtsu, JP;
Masao Kikuchi, Tokyo, JP;
Masayuki Tendo, Tokyo, JP;
Junichi Hamada, Hikari, JP;
Satoshi Akamatsu, Futtsu, JP;
Abstract
A ferritic stainless steel sheet excellent in press formability and operability, characterized by: containing appropriate amounts of C, N, Cr, Si, Mn, P, S, Al, Ti and V, with the balance consisting of Fe and unavoidable impurities; having a solid lubricating film or films on one or both of the surfaces; and having a ratio Z, defined as Z=Z/Z, of less than 0.5, a tensile strength of 450 MPa or less and an average r-value of 1.7 or more, wherein Zis a friction coefficient of the surface of a solid lubricating film and Zthat of the surface of a reference material coated with neither a coating nor lubricating oil. In the ferritic stainless steel sheet, the amounts of Sol-Ti and Insol-V may be regulated to appropriate ranges, wherein Sol-Ti means the amount of Ti existing in the state of solid solution in steel and Insol-V means the amount of V existing in the state of precipitation in steel.