(19)

(11)

EP 2 627 790 A1

(12)

(43) Date of publication: 21.08.2013 Bulletin 2013/34 (21) Application number: 11772882.4 (22) Date of filing: 10.10.2011

(51) International Patent Classification (IPC):  C21D 9/46(2006.01) C22C 38/04(2006.01) C22C 38/14(2006.01) C21D 9/48(2006.01) C22C 38/02(2006.01) C22C 38/12(2006.01) C21D 1/673(2006.01) (86) International application number: PCT/EP2011/005053 (87) International publication number: WO 2012/048841 (19.04.2012 Gazette 2012/16)

(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: 12.10.2010 EP 10013537 (71) Applicant: Tata Steel IJmuiden BV 1970 CA IJmuiden (NL)	(72) Inventors: CHEN, Shangping 1970 CA Ijmuiden (NL) LAHAYE, Christiaan, Theodorus, Wilhelmus 1970 CA Ijmuiden (NL) (74) Representative: Kruit, Jan  Tata Steel Group Intellectual Property Services P.O. Box 10000 1970 CA IJmuiden 1970 CA IJmuiden (NL)