(19)

(11)

EP 2 580 357 A1

(12)

(43) Date of publication: 17.04.2013 Bulletin 2013/16 (21) Application number: 11725918.4 (22) Date of filing: 10.06.2011

(51) International Patent Classification (IPC):  C21D 1/18(2006.01) C22C 38/00(2006.01) C22C 38/32(2006.01) C21D 6/00(2006.01) C22C 38/18(2006.01) C22C 38/48(2006.01) (86) International application number: PCT/EP2011/059657 (87) International publication number: WO 2011/154515 (15.12.2011 Gazette 2011/50)

(84) Designated Contracting States: 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 (30) Priority: 10.06.2010 EP 10165598 (71) Applicant: Tata Steel Nederland Technology B.V. 1970 CA IJmuiden (NL)	(72) Inventors: SACHADEL, Urszula, Alicja NL-2011 JJ Haarlem (NL) MORRIS, Peter, Francis Rotherham South Yorkshire S60 3ED (GB) CLARKE, Philip Sheffield South Yorkshire S9 4AT (GB) LIU, Cheng NL-1991 TZ Velserbroek (NL) (74) Representative: Bodin, Andre  Tata Steel Nederland Technology BV Group Intellectual Property Services - 3H.18 PO Box 10000 1970 CA IJmuiden 1970 CA IJmuiden (NL)