EP 3167091 B1 20180912 - HOT-ROLLED STEEL SHEET AND ASSOCIATED MANUFACTURING METHOD
Title (en)
HOT-ROLLED STEEL SHEET AND ASSOCIATED MANUFACTURING METHOD
Title (de)
HEISSGEWALZTES STAHLBLECH UND ZUGEHÖRIGES HERSTELLUNGSVERFAHREN
Title (fr)
TÔLE D'ACIER LAMINÉE À CHAUD ET PROCÉDÉ DE FABRICATION ASSOCIÉ
Publication
Application
Priority
- IB 2014001312 W 20140711
- IB 2015001159 W 20150710
Abstract (en)
[origin: WO2016005780A1] The invention mainly relates to a sheet of hot-rolled steel having an elastic limit higher than 680 MPa at least in the direction across the rolling direction, and no higher than 840 MPa, with a strength of 780 MPa and 950 MPa, an elongation at break higher than 10% and hole expansion ratio (Ac) no lower than 45%, in which the chemical composition includes, the contents being given as weight percentages: 0.04% < C < 0.08%, 1.2% < Mn < 1.9%, 0.1% < Si < 0.3%, 0.07% < Ti < 0.125%, 0.05% < Mo < 0.25%, 0.16% < Cr < 0.55% when 0.05% < Mo < 0.11% or 0.10% < Cr < 0.55% when 0.11 % < Mo < 0.25%, Nb < 0.045%, 0.005% ≤ Al < 0.1 %, 0.002% < N < 0.01 %, S < 0.004%, P < 0.020%, the remainder consisting of iron and inevitable impurities from the production process, in which the microstructure consists of granular bainite with a surface percentage higher than 70%, and ferrite with a surface percentage lower than 20%, the possible complement consisting of lower bainite, martensite and residual austenite, the sum of the contents of martensite and residual austenite being lower than 5%. The invention also relates to the method for manufacturing such a sheet.
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)
CPC (source: CN EP KR RU US)
B21C 37/02 (2013.01 - CN); C21D 6/005 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - EP KR US); C21D 8/0278 (2013.01 - EP US); C21D 8/04 (2013.01 - RU); C21D 9/46 (2013.01 - EP RU US); C22C 33/04 (2013.01 - CN); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - CN EP KR US); C22C 38/04 (2013.01 - CN EP KR US); C22C 38/06 (2013.01 - CN EP US); C22C 38/12 (2013.01 - CN EP KR US); C22C 38/14 (2013.01 - CN EP US); C22C 38/18 (2013.01 - CN); C22C 38/22 (2013.01 - EP KR US); C22C 38/26 (2013.01 - EP KR US); C22C 38/28 (2013.01 - EP KR RU US); C22C 38/38 (2013.01 - KR RU); C23C 2/06 (2013.01 - US); C23C 2/40 (2013.01 - US); C21D 8/04 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP KR US); C21D 2211/004 (2013.01 - EP KR US); C21D 2211/005 (2013.01 - EP US)
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)
WO 2016005780 A1 20160114; BR 112017000405 A2 20180123; BR 112017000405 B1 20210817; CA 2954830 A1 20160114; CA 2954830 C 20190212; CN 106536780 A 20170322; CN 106536780 B 20181221; EP 3167091 A1 20170517; EP 3167091 B1 20180912; ES 2704472 T3 20190318; HU E042353 T2 20190628; JP 2017526812 A 20170914; JP 6391801 B2 20180919; KR 101928675 B1 20181212; KR 20170015998 A 20170210; MA 39523 A1 20170630; MX 2017000496 A 20170427; PL 3167091 T3 20190228; RU 2017104317 A 20180813; RU 2017104317 A3 20180813; RU 2674360 C2 20181207; TR 201818867 T4 20190121; UA 117790 C2 20180925; US 10858716 B2 20201208; US 11447844 B2 20220920; US 2017183753 A1 20170629; US 2021130921 A1 20210506; WO 2016005811 A1 20160114; ZA 201608396 B 20191030
DOCDB simple family (application)
IB 2014001312 W 20140711; BR 112017000405 A 20150710; CA 2954830 A 20150710; CN 201580037822 A 20150710; EP 15753985 A 20150710; ES 15753985 T 20150710; HU E15753985 A 20150710; IB 2015001159 W 20150710; JP 2017501310 A 20150710; KR 20177000794 A 20150710; MA 39523 A 20150710; MX 2017000496 A 20150710; PL 15753985 T 20150710; RU 2017104317 A 20150710; TR 201818867 T 20150710; UA A201701192 A 20150710; US 201515325690 A 20150710; US 202017087916 A 20201103; ZA 201608396 A 20161206