EP 2977479 A4 20161130 - STEEL MATERIAL HAVING SUPERIOR TOUGHNESS AT WELDING HEAT AFFECTED ZONE
Title (en)
STEEL MATERIAL HAVING SUPERIOR TOUGHNESS AT WELDING HEAT AFFECTED ZONE
Title (de)
STAHLMATERIAL MIT HERVORRAGENDER ZÄHIGKEIT BEIM SCHWEISSEN EINER WÄRMEEINFLUSSZONE
Title (fr)
MATÉRIAU ACIER PRÉSENTANT UNE RÉSISTANCE SUPÉRIEURE DANS UNE ZONE AFFECTÉE PAR LA CHALEUR DE SOUDAGE
Publication
Application
Priority
- JP 2013060452 A 20130322
- JP 2014057205 W 20140317
Abstract (en)
[origin: EP2977479A1] In this steel material satisfying a predetermined chemical composition and having a remainder comprising iron and unavoidable impurities, a complex oxide is contained containing REM, Zr, Ti, Al, Ca, and S, the complex oxide has no greater than 5.0/mm 2 of oxides having a circular-equivalent diameter of greater than 3 µm, and with respect to complex oxides having a circular-equivalent diameter of 0.1-3 µm, there are at least 100/mm 2 of complex oxides satisfying formula (1), and furthermore the average composition of the complex oxides that are 0.1-3 µm satisfying formula (1) is such that there is no greater than 20% of Al 2 O 3 , 3-20% of TiO 2 , 5-50% of ZrO 2 , 5-50 of REM oxide, 5-50% of CaO, and 1-15% of S. (where d is the circular·equivalent diameter of each complex oxide, and is 0.1-·3 µm).
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/14 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP)
C21D 9/46 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/38 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); C21D 8/0226 (2013.01); C21D 2211/004 (2013.01)
Citation (search report)
- [X] JP 2012162797 A 20120830 - KOBE STEEL LTD & EP 2666880 A1 20131127 - KOBE STEEL LTD [JP]
- [X] JP 2011127220 A 20110630 - KOBE STEEL LTD
- [X] JP 2011038180 A 20110224 - KOBE STEEL LTD
- [A] JP 2008088486 A 20080417 - KOBE STEEL LTD
- [A] JP 2011219797 A 20111104 - KOBE STEEL LTD
- [A] JP 2009138255 A 20090625 - KOBE STEEL LTD
- [A] JP 2009179844 A 20090813 - KOBE STEEL LTD
- See references of WO 2014148447A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2977479 A1 20160127; EP 2977479 A4 20161130; EP 2977479 B1 20180425; CN 105051229 A 20151111; CN 105051229 B 20170315; JP 2014185364 A 20141002; JP 6226542 B2 20171108; KR 101718275 B1 20170320; KR 20150119391 A 20151023; WO 2014148447 A1 20140925
DOCDB simple family (application)
EP 14767775 A 20140317; CN 201480016899 A 20140317; JP 2013060452 A 20130322; JP 2014057205 W 20140317; KR 20157025566 A 20140317