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. 22, 2017
Filed:
Apr. 18, 2013
Jfe Steel Corporation, Tokyo, JP;
Taro Kizu, Kawasaki, JP;
Yoshimasa Funakawa, Fukuyama, JP;
Hidekazu Ookubo, Chiba, JP;
Tokunori Kanemura, Chiba, JP;
Masato Shigemi, Chiba, JP;
Shoji Kasai, Kawasaki, JP;
Shinji Yamazaki, Kawasaki, JP;
Yusuke Yasufuku, Kawasaki, JP;
JFE Steel Corporation, , JP;
Abstract
The high strength steel sheet has a chemical composition including 0.08% to 0.20% of C, 0.3% or less of Si, 0.1% to 3.0% of Mn, 0.10% or less of P, 0.030% or less of S, 0.10% or less of Al, 0.010% or less of N, 0.20% to 0.80% of V, and the remainder composed of Fe and incidental impurities on a percent by mass basis, and a microstructure which includes 95% or more of ferrite phase on an area percentage basis, in which fine precipitates are dispersed having a distribution in such a way that the number density of precipitates having a particle size of less than 10 nm is 1.0×10/μmor more and the standard deviation of natural logarithm values of precipitate particle sizes with respect to precipitates having a particle size of less than 10 nm is 1.5 or less.