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:
Aug. 24, 2021
Filed:
Jul. 05, 2017
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A rolled wire rod wherein the contents of Ti, N, and S (mass %) are respectively [Ti], [N], and [S], and, if [S]≤0.0010, [Ti] is (4.5×[S]+3.4×[N]) or more and (0.008+3.4×[N]) or less, while if [S]≥0.0010, [Ti] is (4.5×[S]+3.4×[N]) or more and (8.0×[S]+3.4×[N]) or less, the internal structure is a mixed structure of ferrite and pearlite with an area ratio of a ferrite fraction of 40% or more, and a mean area of sulfides present in a range from a surface of the wire rod to a depth position D/8 from the surface of the wire rod is 6 μmor less, wherein D represents a diameter, in mm, in a cross-section of the wire rod at a plane including the axis of the wire rod, and a mean aspect ratio of the sulfides is 5 or less.