(19)

(11)

EP 2 670 870 A1

(12)

(43) Date of publication: 11.12.2013 Bulletin 2013/50 (21) Application number: 12708776.5 (22) Date of filing: 31.01.2012

(51) International Patent Classification (IPC):  C21C 7/10(2006.01) C21D 9/48(2006.01) C21D 8/04(2006.01) C22C 38/00(2006.01) (86) International application number: PCT/EP2012/051566 (87) International publication number: WO 2012/104306 (09.08.2012 Gazette 2012/32)

(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: 31.01.2011 EP 11152816 13.04.2011 EP 11162332 (71) Applicant: Tata Steel IJmuiden BV 1970 CA IJmuiden (NL)	(72) Inventors: RICHARDS, Bernardus Johannes NL-1970 CA IJmuiden (NL) SCHAAR, Benno NL-1970 CA Ijmuiden (NL) TIEKINK, Wouter Karel NL-1970 CA IJmuiden (NL) (74) Representative: Bodin, Andre  Tata Steel Nederland Technology BV Group Intellectual Property Services PO Box 10000-3G.37 1970 CA IJmuiden 1970 CA IJmuiden (NL)