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Title:
H-STEEL AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/117228
Kind Code:
A1
Abstract:
Provided is an H-steel having a chemical composition containing C, Si, Mn, Nb, V, Ti, and N, and having a microstructure in which the area ratio of ferrite is at least 60% and less than 100%, the average grain size of the ferrite being 1-30 µm and the thickness of the ferrite being 20-140 mm, wherein the tensile yield stress is 385-530 MPa, and the Charpy absorbed energy at -20°C is at least 100 J.

Inventors:
MIZOGUCHI MASAKI (JP)
ICHIKAWA KAZUTOSHI (JP)
SUGIYAMA HIROKAZU (JP)
SEIKE TETSUYA (JP)
Application Number:
PCT/JP2017/045965
Publication Date:
June 28, 2018
Filing Date:
December 21, 2017
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C21D8/00; C22C38/14; C22C38/58
Domestic Patent References:
WO2014080818A12014-05-30
WO2011065479A12011-06-03
Foreign References:
JP2016141834A2016-08-08
JP2016079443A2016-05-16
JP2016117945A2016-06-30
JP2016117932A2016-06-30
JP2012180584A2012-09-20
JP2012041603A2012-03-01
JP2011106006A2011-06-02
JP2005264208A2005-09-29
JP2004256894A2004-09-16
JP2002363642A2002-12-18
JP2016248181A2016-12-21
JP5655984B22015-01-21
JP5867651B22016-02-24
JP2003328070A2003-11-19
JP2011106006A2011-06-02
JPH01158543A1989-06-21
JPH11335735A1999-12-07
JP2016084524A2016-05-19
JPH1068016A1998-03-10
Other References:
See also references of EP 3533893A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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