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(11)

EP 3 658 692 A1

(12)

(43) Date of publication: 03.06.2020 Bulletin 2020/23 (21) Application number: 18740258.1 (22) Date of filing: 23.07.2018

(51) International Patent Classification (IPC):  C21D 8/00(2006.01) C21D 9/00(2006.01) C22C 38/00(2006.01) C22C 38/04(2006.01) C22C 38/20(2006.01) C22C 38/24(2006.01) C22C 38/28(2006.01) C22C 38/38(2006.01) C22C 38/48(2006.01) C22C 38/54(2006.01) C21D 8/02(2006.01) C21D 9/46(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C22C 38/22(2006.01) C22C 38/26(2006.01) C22C 38/32(2006.01) C22C 38/42(2006.01) C22C 38/50(2006.01) C22C 38/58(2006.01) (86) International application number: PCT/EP2018/069939 (87) International publication number: WO 2019/020575 (31.01.2019 Gazette 2019/05)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 25.07.2017 EP 17183092 18.08.2017 EP 17186911 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventor: RANA, Radhakanta 1970 CA IJmuiden (NL) (74) Representative: Group Intellectual Property Services  c/o Tata Steel Nederland Technology B.V. P.O. Box 10000 - 3G.37 1970 CA IJmuiden 1970 CA IJmuiden (NL)