Title:
STEEL SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2019183205
Kind Code:
A
Abstract:
To provide a steel sheet excellent in toughness of a base material and a weld zone when multilayer weldment is conducted, especially satisfying joint part toughness value at -60°C:35 J or more and a CTOD value at -10°C:0.10 mm or more, and having yield stress (YS):480 MPa or more and tensile stress (TS):550 MPa or more and sheet thickness of 30 to 100 mm.SOLUTION: A component composition contains, by mass%, C:0.01 to 0.10%, Si:0.6% or less, Mn:1.0 to 1.8%, P:0.01% or less, S:0.0005 to 0.0050%, Al:0.001 to 0.060%, Ni:0.2 to 2.0%, Ti:0.005 to 0.050%, N:0.0015 to 0.0065%, O:0.0010 to 0.0050%, and Ca:0.0005 to 0.0060% in prescribed ranges.SELECTED DRAWING: None
Inventors:
TAKEUCHI YOSHIKO
ICHINOMIYA KATSUYUKI
HASE KAZUKUNI
ICHINOMIYA KATSUYUKI
HASE KAZUKUNI
Application Number:
JP2018073016A
Publication Date:
October 24, 2019
Filing Date:
April 05, 2018
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
C22C38/00; C21D8/02; C22C38/14; C22C38/58
Domestic Patent References:
| JP2014177669A | 2014-09-25 | |||
| JP2013204103A | 2013-10-07 | |||
| JP2012184500A | 2012-09-27 | |||
| JP2007231312A | 2007-09-13 | |||
| JP2010202976A | 2010-09-16 | |||
| JP2009235549A | 2009-10-15 | |||
| JP2009235548A | 2009-10-15 | |||
| JP2009041079A | 2009-02-26 | |||
| JP2005187853A | 2005-07-14 | |||
| JP2018012853A | 2018-01-25 | |||
| JP2017186614A | 2017-10-12 |
Foreign References:
| WO2016035110A1 | 2016-03-10 | |||
| WO2014141632A1 | 2014-09-18 | |||
| WO2015151519A1 | 2015-10-08 | |||
| WO2015088040A1 | 2015-06-18 | |||
| WO2014141633A1 | 2014-09-18 | |||
| WO2013099179A1 | 2013-07-04 |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Keisuke Kawahara
Mitsutsugu Sugimura
Keisuke Kawahara