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:
Jan. 27, 2026
Filed:
Mar. 02, 2020
Nippon Steel Corporation, Tokyo, JP;
Kohei Nakada, Tokyo, JP;
Takeshi Toyoda, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
Provided is a hot rolled steel sheet comprising a predetermined chemical composition, and a metallic structure comprising, by area ratio, pearlite: 90 to 100%, pseudo pearlite: 0 to 10%, and pro-eutectoid ferrite: 0 to 1%, wherein the pearlite has an average lamellar spacing of 0.20 μm or less, and the pearlite has an average pearlite block size of 20.0 μm or less. Provided is a method for producing a hot rolled steel sheet comprising heating a slab to 1100° C. or more, hot rolling where an exit side temperature of finishing rolling is 820 to 920° C., primary cooling the steel sheet down to an Ae1 point by an average cooling rate of 40 to 80° C./s, then secondary cooling the steel sheet from the Ae1 point down to a coiling temperature by an average cooling rate of less than 20° C./s, and coiling the steel sheet at a coiling temperature of 540 to 700° C.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile