EP 3476964 A4 20190522 - STEEL SHEET FOR CROWN CAPS, PRODUCTION METHOD THEREFOR, AND CROWN CAP
Title (en)
STEEL SHEET FOR CROWN CAPS, PRODUCTION METHOD THEREFOR, AND CROWN CAP
Title (de)
STAHLBLECH FÜR KRONKORKEN, HERSTELLUNGSVERFAHREN DAFÜR UND KRONKORKEN
Title (fr)
TÔLE D'ACIER POUR CAPSULE-COURONNE, PROCÉDÉ DE FABRICATION CORRESPONDANT, ET CAPSULE-COURONNE
Publication
Application
Priority
- JP 2016192247 A 20160929
- JP 2017033179 W 20170914
Abstract (en)
[origin: EP3476964A1] To provide a steel sheet for crown caps, having sufficient pressure resistance and formability regardless of gauge reduction; a method for manufacturing the same; and a crown cap. A steel sheet for crown caps has a predetermined composition, wherein N total-(N as AlN) is 0.0090% to 0.0170%, the maximum grain size of a carbide is 2.0 µm or less in a cross section in a rolling direction, and the yield strength is 420 MPa to 600 MPa in the rolling direction. A method for manufacturing a steel sheet for crown caps includes a hot rolling step of coiling a steel material having a predetermined composition at a predetermined temperature after finish rolling; a primary cold rolling step; a continuous annealing step of performing heating at an average heating rate of 10 °C/s to 30 °C/s in a temperature range A from 500 °C to 600 °C in a heating course, annealing at a annealing temperature B in a temperature range from 620 °C to 740 °C, cooling from the annealing temperature B to a cooling stop temperature C in a temperature range from 400 °C to 580 °C at an average cooling rate of 20 °C/s or more, and retaining in the temperature range from 400 °C to 580 °C for a retention time of 30 seconds to 90 seconds after cooling at the above average cooling rate is stopped; and a secondary cold rolling step of performing cold rolling at a rolling reduction ratio of 1.0% to 12%.
IPC 8 full level
C22C 38/00 (2006.01); B21B 1/00 (2006.01); B65D 41/00 (2006.01); B65D 41/10 (2006.01); C21D 1/26 (2006.01); C21D 1/28 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C21D 9/46 (2006.01); C21D 9/48 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)
CPC (source: EP)
B65D 41/10 (2013.01); C21D 1/26 (2013.01); C21D 1/28 (2013.01); C21D 6/005 (2013.01); C21D 6/02 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0247 (2013.01); C21D 8/0268 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01)
Citation (search report)
- [Y] EP 2253729 A1 20101124 - JFE STEEL CORP [JP]
- [Y] EP 1291447 A1 20030312 - KAWASAKI STEEL CO [JP]
- [A] JP H1072640 A 19980317 - KAWASAKI STEEL CO
- [A] JP 2016079505 A 20160516 - JFE STEEL CORP
- See references of WO 2018061787A1
Designated contracting state (EPC)
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 state (EPC)
BA ME
DOCDB simple family (publication)
EP 3476964 A1 20190501; EP 3476964 A4 20190522; EP 3476964 B1 20210127; CO 2019001705 A2 20190308; JP 6601571 B2 20191106; JP WO2018061787 A1 20181220; MX 2019002404 A 20190620; MY 197920 A 20230725; PH 12019550011 A1 20191202; PL 3476964 T3 20210719; WO 2018061787 A1 20180405; ZA 201900744 B 20200826
DOCDB simple family (application)
EP 17855743 A 20170914; CO 2019001705 A 20190226; JP 2017033179 W 20170914; JP 2018542371 A 20170914; MX 2019002404 A 20170914; MY PI2019000961 A 20170914; PH 12019550011 A 20190123; PL 17855743 T 20170914; ZA 201900744 A 20190205