EP 2737961 A1 20140604 - METHOD FOR PRODUCING AUSTENITIC STAINLESS STEEL
Title (en)
METHOD FOR PRODUCING AUSTENITIC STAINLESS STEEL
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES AUSTENITISCHEN EDELSTAHLS
Title (fr)
PROCÉDÉ DE PRODUCTION D'ACIER INOXYDABLE AUSTÉNITIQUE
Publication
Application
Priority
- JP 2011166361 A 20110729
- JP 2012068905 W 20120726
Abstract (en)
It is possible to securely produce high Si-containing austenitic stainless steel having corrosion resistance usable in a highly-concentrated nitric acid environment at a high temperature without generating scabs by heating and hot-rolling a slab of stainless steel at a heating temperature during the hot rolling, and subsequently, carrying out heat treatment to heat the hot-rolled stainless steel at a temperature of 1100 to 1160°C, and thereafter, to cool this stainless steel at cooling rate of at least 100°C/min. , wherein the slab of stainless steel has a chemical composition containing: C: at most 0.04% ; Cr: 7 to 20%, Ni: 10 to 22%, Si: 2.5 to 7%, Mn: at most 10% , sol. Al: at most 0.03% , P: at most 0.03% , S: at most 0.03% ; N: at most 0.035% , a total amount of one or more types of elements selected from Nb, Ti, Ta, and Zr: 0.05 to 0.7%; and the remainder being Fe and impurities, and the heating temperature during the hot rolling is defined as T h in which ”T of Formula (1): T h = 1135 - 90Si - 2.9Cr + 40Ni - ”T is at least 30°C.
IPC 8 full level
B21B 3/02 (2006.01); B21B 1/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/34 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP US)
B21B 1/026 (2013.01 - US); C21D 6/004 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/005 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); B21B 2001/028 (2013.01 - US); C21D 2211/001 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US)
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 2737961 A1 20140604; EP 2737961 A4 20150603; EP 2737961 B1 20161214; CN 103826766 A 20140528; CN 103826766 B 20151125; JP 5418734 B2 20140219; JP WO2013018628 A1 20150305; KR 101495483 B1 20150224; KR 20140037969 A 20140327; SI 2737961 T1 20170531; US 2014261917 A1 20140918; WO 2013018628 A1 20130207
DOCDB simple family (application)
EP 12819669 A 20120726; CN 201280046368 A 20120726; JP 2012068905 W 20120726; JP 2013526850 A 20120726; KR 20147005051 A 20120726; SI 201230842 A 20120726; US 201214235849 A 20120726