EP 4056723 A4 20231018 - HOT ROLLED STEEL SHEET AND PRODUCTION METHOD THEREOF
Title (en)
HOT ROLLED STEEL SHEET AND PRODUCTION METHOD THEREOF
Title (de)
WARMGEWALZTES STAHLBLECH UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE D'ACIER LAMINÉE À CHAUD ET PROCÉDÉ DE PRODUCTION CORRESPONDANT
Publication
Application
Priority
- JP 2019201427 A 20191106
- JP 2020038468 W 20201012
Abstract (en)
[origin: EP4056723A1] This hot-rolled steel sheet has a predetermined chemical composition, in which a microstructure contains, by area%, bainite: 80.0% or more, ferrite: 10.0% or less, and a remainder in the microstructure: 10.0% or less, a total density of a length L<sub>7</sub> of a grain boundary having a crystal orientation difference of 7° and a length L<sub>68</sub> of a grain boundary having a crystal orientation difference of 68° about a <110> direction in the bainite is 0.35 to 0.60 µm/µm<sup>2</sup>, and a tensile strength is 780 MPa or more.
IPC 8 full level
C21D 8/02 (2006.01); B21B 37/74 (2006.01); C21D 1/19 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/28 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01)
CPC (source: CN EP KR US)
B21B 3/02 (2013.01 - US); B21B 37/74 (2013.01 - CN); C21D 1/19 (2013.01 - EP); C21D 6/001 (2013.01 - US); C21D 6/002 (2013.01 - US); C21D 6/005 (2013.01 - US); C21D 6/007 (2013.01 - US); C21D 6/008 (2013.01 - US); C21D 8/0205 (2013.01 - CN); C21D 8/021 (2013.01 - EP); C21D 8/0226 (2013.01 - CN EP KR); C21D 8/0247 (2013.01 - KR); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - US); C22C 38/002 (2013.01 - CN US); C22C 38/005 (2013.01 - CN US); C22C 38/02 (2013.01 - CN EP US); C22C 38/04 (2013.01 - CN EP); C22C 38/06 (2013.01 - CN EP US); C22C 38/08 (2013.01 - US); C22C 38/14 (2013.01 - EP); C22C 38/16 (2013.01 - US); C22C 38/22 (2013.01 - US); C22C 38/24 (2013.01 - US); C22C 38/26 (2013.01 - US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - US); C22C 38/34 (2013.01 - CN); C22C 38/38 (2013.01 - US); C22C 38/42 (2013.01 - CN KR); C22C 38/44 (2013.01 - CN KR); C22C 38/46 (2013.01 - CN KR); C22C 38/48 (2013.01 - CN KR); C22C 38/50 (2013.01 - CN EP KR); C22C 38/52 (2013.01 - CN); C22C 38/54 (2013.01 - CN KR); C22C 38/58 (2013.01 - CN KR); C21D 1/02 (2013.01 - EP); C21D 2211/002 (2013.01 - CN EP KR US); C21D 2211/005 (2013.01 - CN KR US); C22C 38/002 (2013.01 - EP); C22C 38/005 (2013.01 - EP); C22C 38/08 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/16 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP); C22C 38/26 (2013.01 - EP); C22C 38/32 (2013.01 - EP); C22C 38/38 (2013.01 - EP)
Citation (search report)
- [A] WO 2013150687 A1 20131010 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] EP 2812455 A1 20141217 - ASCOMETAL SA [FR], et al
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
DOCDB simple family (publication)
EP 4056723 A1 20220914; EP 4056723 A4 20231018; CN 114630917 A 20220614; CN 114630917 B 20231024; JP 7243854 B2 20230322; JP WO2021090642 A1 20210514; KR 20220068250 A 20220525; MX 2022004885 A 20220516; US 2022259692 A1 20220818; WO 2021090642 A1 20210514
DOCDB simple family (application)
EP 20884487 A 20201012; CN 202080074990 A 20201012; JP 2020038468 W 20201012; JP 2021554855 A 20201012; KR 20227013559 A 20201012; MX 2022004885 A 20201012; US 202017765697 A 20201012