EP 2103697 A4 20150311 - HIGH CARBON HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCTION THEREOF
Title (en)
HIGH CARBON HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCTION THEREOF
Title (de)
KOHLENSTOFFREICHES HEISSGEWALZTES STAHLBLECH UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE EN ACIER LAMINÉ À CHAUD, À TENEUR EN CARBONE ÉLEVÉE, ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- JP 2007075341 W 20071221
- JP 2006347539 A 20061225
Abstract (en)
[origin: EP2103697A1] The present invention provides a high-carbon hot-rolled steel sheet having excellent bending properties after stretching and a method of producing the same. A method of producing a high-carbon hot-rolled steel sheet includes a step of hot-rolling steel having a composition containing, in % by mass, 0.2 to 0.7% of C, 2% or less of Si, 2% or less of Mn, 0.03% or less of P, 0.03% or less of S, 0.01% or less of Sol. Al, and 0.01% or less of N at a finishing temperature of (Ar 3 transformation point - 20°C) or more to form a hot-rolled steel sheet, a step of cooling the hot-rolled steel sheet to a temperature of 650°C or less at a cooling rate of 60 °C/sec to less than 120 °C/sec, a step of coiling the hot-rolled steel sheet at a coiling temperature of 600°C or less after cooling, and a step of annealing the hot-rolled steel sheet at an annealing temperature of 640°C to Ac 1 transformation point.
IPC 8 full level
C21D 9/46 (2006.01); C21D 8/02 (2006.01); C22C 38/06 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21D 8/02 (2013.01 - KR); C21D 8/0226 (2013.01 - EP); C21D 9/46 (2013.01 - EP KR); C22C 38/001 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP KR); C22C 38/08 (2013.01 - EP); C22C 38/38 (2013.01 - EP); C22C 38/58 (2013.01 - KR)
Citation (search report)
- [E] EP 2003220 A1 20081217 - JFE STEEL CORP [JP]
- [E] EP 1980635 A1 20081015 - JFE STEEL CORP [JP]
- [X] JP 2001214234 A 20010807 - NIPPON KOKAN KK
- [X] JP S5550427 A 19800412 - KAWASAKI STEEL CO
- [A] JP H10265845 A 19981006 - KAWASAKI STEEL CO
- [A] JP H0987798 A 19970331 - KAWASAKI STEEL CO
- See references of WO 2008081956A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2103697 A1 20090923; EP 2103697 A4 20150311; EP 2103697 B1 20190501; CN 101568655 A 20091028; CN 101568655 B 20110629; JP 2008156712 A 20080710; JP 4952236 B2 20120613; KR 101107531 B1 20120131; KR 20090094001 A 20090902; TW 200837199 A 20080916; TW I333507 B 20101121; WO 2008081956 A1 20080710
DOCDB simple family (application)
EP 07860538 A 20071221; CN 200780048211 A 20071221; JP 2006347539 A 20061225; JP 2007075341 W 20071221; KR 20097013010 A 20071221; TW 96149870 A 20071225