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(11)

EP 2 547 799 A2

(12)

(88) Date of publication A3: 22.11.2012 (43) Date of publication: 23.01.2013 Bulletin 2013/04 (21) Application number: 11717012.6 (22) Date of filing: 18.03.2011

(51) International Patent Classification (IPC):  C21D 6/00(2006.01) C21D 9/46(2006.01) C21D 8/12(2006.01) C22C 38/02(2006.01) (86) International application number: PCT/IB2011/000582 (87) International publication number: WO 2011/114227 (22.09.2011 Gazette 2011/38)

(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: 19.03.2010 WO PCT/IB2010/000591 (71) Applicant: Aperam 1882 Luxembourg (LU)

(72) Inventors: CICALE, Stefano I-05029 San Gemini (IT) ABBRUZZESE, Giuseppe I-05026 Montecastrilli (IT) DA CUNHA, Marco, Antônio 35180-304 Timoteo MG (BR) DE ARAUJO QUINTAO, Hélcio 35182-394 Timoteo MG (BR) CLARET RIBEIRO SILVA, Ronaldo 35180-304 Timoteo MG (BR) DE FARIA FONSECA, Angelo, José 35182-400 Timoteo MG (BR) (74) Representative: Jacobson, Claude  Cabinet Lavoix 2, Place d'Estienne d'Orves 75441 Paris Cedex 09 75441 Paris Cedex 09 (FR)