Invention Grant
- Patent Title: Steel sheet, member, and methods for producing them
-
Application No.: US17415532Application Date: 2019-10-25
-
Publication No.: US12077831B2Publication Date: 2024-09-03
- Inventor: Shimpei Yoshioka , Yoshihiko Ono , Yuma Honda , Nobuyuki Nakamura
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP 18238963 2018.12.21
- International Application: PCT/JP2019/041817 2019.10.25
- International Announcement: WO2020/129402A 2020.06.25
- Date entered country: 2021-06-17
- Main IPC: C21D9/46
- IPC: C21D9/46 ; B22D11/18 ; C21D8/02 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/12 ; C22C38/14 ; C23C2/06
Abstract:
A steel sheet having a specified chemical composition and a tensile strength of 1,320 MPa or more, and methods for producing the steel sheet. The steel sheet has a specified microstructure including martensite and bainite, the total area fraction of the martensite and the bainite being 95% or more and 100% or less, the balance being one or more selected from ferrite and retained austenite. The forumulae [% Ti]+[% Nb]>0.007 and [% Ti]×[% Nb]2≤7.5×10−6 are satisfied in the chemical composition.
Public/Granted literature
- US20220056549A1 STEEL SHEET, MEMBER, AND METHODS FOR PRODUCING THEM Public/Granted day:2022-02-24
Information query
