EP 3081663 A4 20170614 - STEEL PLATE WITH EXCELLENT SOUR RESISTANCE, HAZ TOUGHNESS AND HAZ HARDNESS, AND STEEP PIPE FOR LINE PIPE
Title (en)
STEEL PLATE WITH EXCELLENT SOUR RESISTANCE, HAZ TOUGHNESS AND HAZ HARDNESS, AND STEEP PIPE FOR LINE PIPE
Title (de)
STAHLPLATTE MIT AUSGEZEICHNETER SÄUREBESTÄNDIGKEIT, ZÄHIGKEIT GEGENÜBER WÄRMEEINFLUSSZONE, FESTIGKEIT GEGENÜBER WÄRMEEINFLUSSZONE UND STAHLROHR FÜR EIN LEITUNGSROHR
Title (fr)
PLAQUE D'ACIER DOTÉE D'UNE EXCELLENTE RÉSISTANCE À L'ACIDITÉ, D'UNE EXCELLENTE TÉNACITÉ HAZ ET D'UNE EXCELLENTE DURETÉ HAZ ET TUYAU EN ACIER POUR TUYAU DE CANALISATION
Publication
Application
Priority
- JP 2013256080 A 20131211
- JP 2014082763 W 20141210
Abstract (en)
[origin: US2016244865A1] The present invention relates to a steel plate with excellent sour resistance, HAZ toughness and HAZ hardness, including, in terms of mass %, C: 0.02-0.20%, Si: 0.02-0.50%, Mn: 0.6-2.0%, P: over 0% and 0.030% or less, S: over 0% and 0.004% or less, Al: 0.010-0.08%, N: 0.001-0.01%, Nb: 0.002% or more and less than 0.05%, O: over 0% and 0.0040% or less, REM: 0.0002-0.05%, and Zr: 0.0003-0.020% with the remainder consisting of iron and inevitable impurities, in which an expression 10,000×[Nb]+31×Di−82≧0 (where Di=([C]/10)0.5×(1+0.7×[Si])×(1+3.33×[Mn])×(1+0.35×[Cu])×(1+0.36×[Ni])×(1+2.16×[Cr])×(1+3×[Mo])×(1+1.75×[V])×1.115) is satisfied, and, in the composition of inclusions with 1 μm or more width contained in steel, Zr amount is 1-40%, REM amount is 5-50%, Al amount is 3-30%, and S amount is over 0% and less than 20%.
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/02 (2006.01); C21D 9/14 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 8/02 (2013.01 - KR); C21D 8/0226 (2013.01 - KR); C21D 8/0263 (2013.01 - KR); C21D 9/14 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP KR US); C22C 38/00 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP KR US); C22C 38/16 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/58 (2013.01 - KR); C21D 8/02 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US)
Citation (search report)
- [X] US 2013260164 A1 20131003 - KATO TAKU [JP], et al
- [XA] EP 2666880 A1 20131127 - KOBE STEEL LTD [JP]
- [A] JP H09194998 A 19970729 - NIPPON KOKAN KK
- [A] US 2003121577 A1 20030703 - CHOI HAE-CHANG [KR], et al
- [A] JP H0610040 A 19940118 - NIPPON STEEL CORP
- [A] L. HOLAPPA ET AL: "Thermodynamic examination of inclusion modification and precipitation from calcium treatment to solidified steel", IRONMAKING & STEELMAKING: PROCESSES, PRODUCTS AND APPLICATIONS, vol. 30, no. 2, 18 April 2003 (2003-04-18), United Kingdom, pages 111 - 115, XP055369485, ISSN: 0301-9233, DOI: 10.1179/030192303225001748
- See references of WO 2015087940A1
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)
US 2016244865 A1 20160825; CN 105765098 A 20160713; CN 105765098 B 20180508; EP 3081663 A1 20161019; EP 3081663 A4 20170614; JP 2015132014 A 20150723; JP 6193206 B2 20170906; KR 20160083936 A 20160712; WO 2015087940 A1 20150618
DOCDB simple family (application)
US 201415027273 A 20141210; CN 201480064679 A 20141210; EP 14870221 A 20141210; JP 2014082763 W 20141210; JP 2014245155 A 20141203; KR 20167015157 A 20141210