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:
Apr. 05, 2022
Filed:
Dec. 15, 2017
Jfe Steel Corporation, Tokyo, JP;
Kazuaki Tsuchimoto, Tokyo, JP;
Shinji Otsuka, Tokyo, JP;
Kentaro Hata, Tokyo, JP;
Akira Matsuzaki, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
A steel sheet mainly suitable for strength members of automobiles or building materials, which has a tensile strength of 1,180 MPa or more, and which is excellent in delayed fracture resistance and primary rust prevention performance. The steel sheet includes a coating, placed on a surface of a cold-rolled steel sheet with a tensile strength of 1,180 MPa or more, containing one or more metalates selected from molybdates and tungstates and a P compound. The sum of the coating weights of the metalates in terms of Mo and W is 10 mg/mto 1,000 mg/mand is preferably 50 mg/mto 1,000 mg/m. The coating weight of the P compound in terms of P is 10 mg/mto 1,000 mg/m.