Invention Grant
US08747577B2 High yield ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same
有权
高屈服比和高强度薄钢板在焊接性和延展性方面优异，高产率高强度热浸镀锌薄板，高产率高强度热浸合金化热镀锌薄钢板，以及 生产相同
- Patent Title: High yield ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same
- Patent Title (中): 高屈服比和高强度薄钢板在焊接性和延展性方面优异，高产率高强度热浸镀锌薄板，高产率高强度热浸合金化热镀锌薄钢板，以及 生产相同
-
Application No.: US13134294Application Date: 2011-06-03
-
Publication No.: US08747577B2Publication Date: 2014-06-10
- Inventor: Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
- Applicant: Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel & Sumitomo Metal Corporation
- Current Assignee: Nippon Steel & Sumitomo Metal Corporation
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2003-341152 20030930; JP2003-341456 20030930
- Main IPC: C22C38/02
- IPC: C22C38/02 ; C22C38/04 ; C22C38/12 ; C22C38/14
Abstract:
High yield ratio high-strength hot rolled thin steel sheet superior in weldability and ductility comprising, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0.02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously satisfying 1.1≦14×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised of iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×El1/2 of 3320 or more, an YR×TS×El1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.
Public/Granted literature
Information query
