Invention Grant
- Patent Title: High strength steel sheet having high Young's modulus and method for manufacturing the same
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Application No.: US14909253Application Date: 2014-07-16
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Publication No.: US10563279B2Publication Date: 2020-02-18
- Inventor: Hidekazu Minami , Takeshi Yokota , Kazuhiro Seto
- 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: JP2013-160878 20130802; JP2013-160880 20130802
- International Application: PCT/JP2014/003775 WO 20140716
- International Announcement: WO2015/015739 WO 20150205
- Main IPC: C22C38/12
- IPC: C22C38/12 ; C21D9/46 ; C23C2/02 ; C23C2/06 ; C23C2/28 ; C22C38/14 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/08 ; C22C38/16 ; C22C38/38 ; C22C38/60 ; C21D8/02 ; C21D6/00 ; C22C38/22 ; C22C38/26 ; C22C38/28 ; C23C2/40

Abstract:
A high strength steel sheet having a high Young's modulus, the steel sheet having a chemical composition including, by mass %, C: 0.060% or more and 0.150% or less, Si: 0.50% or more and 2.20% or less, Mn: 1.00% or more and 3.00% or less, and one or both of Ti: 0.001% or more and 0.200% or less and Nb: 0.001% or more and 0.200% or less, in which the contents of C, N, S, Ti, and Nb satisfy the equation 500≤C*≤1300. The steel sheet has a microstructure including ferrite in an amount of 20% or more and martensite in an amount of 5% or more, in terms of area ratio, such that the average grain size of the ferrite is 20.0 μm or less and the inverse intensity ratio of γ-fiber for α-fiber is 1.00 or more in the ferrite and the martensite.
Public/Granted literature
- US20160186283A1 HIGH STRENGTH STEEL SHEET HAVING HIGH YOUNG'S MODULUS AND METHOD FOR MANUFACTURING THE SAME Public/Granted day:2016-06-30
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