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:
Jul. 01, 2008
Filed:
Dec. 28, 2004
Mamoru Nagao, Kobe, JP;
Mamoru Nagao, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
The high carbon steel wire rod contains 0.65% to 1.20% of C, 0.05% to 1.2% of Si, 0.2% to 1.0% of Mn, and 0.35% or less (including 0%) of Cr, further contains P and S each in an amount restricted to 0.02% or less, where 80% or more of the metal structure is constituted by a pearlite structure; and an average tensile strength TS and an average lamellar spacing λ of the high carbon steel wire rod show the relation of TS≦8700/√{square root over ( )}(λ/Ceq)+290 in which Ceq=% C+% Mn/5+% Cr/4. The high carbon steel wire rod can omit a patenting treatment before or during wire drawing, is superior in wire drawability, and exhibits a low drawing resistance in a wire drawing die in an as-hot-rolled state.