EP 3966355 A1 20220316 - METHODS OF PRODUCING CONTINUOUSLY CAST HOT ROLLED HIGH STRENGTH STEEL SHEET PRODUCTS
Title (en)
METHODS OF PRODUCING CONTINUOUSLY CAST HOT ROLLED HIGH STRENGTH STEEL SHEET PRODUCTS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON STRANGGEGOSSENEN WARMGEWALZTEN HOCHFESTEN STAHLBLECHPRODUKTEN
Title (fr)
PROCÉDÉS DE PRODUCTION DE PRODUITS EN TÔLE D'ACIER À HAUTE RÉSISTANCE LAMINÉS À CHAUD COULÉS EN CONTINU
Publication
Application
Priority
- US 201962844301 P 20190507
- US 2020031719 W 20200506
Abstract (en)
[origin: WO2020227438A1] Methods of producing high strength continuously cast hot rolled steel sheet products are disclosed. The methods include continuously casting a steel slab and then hot rolling with finish rolling on a hot strip mill, quenching on the hot strip mill to form a predominantly matrensitic microstructure, and performing a thermal cycling step including soaking at an intercritical temperature followed by holding at a lower temperature. The resultant hot rolled steel sheet products have a microstructure comprising ferrite and retained austenite. Steels processed in accordance with the present invention exhibit favorable combined ultimate tensile strength and total elongation (UTS•TE) properties, and may fall into the category of Generation 3 advanced high strength steels, desirable in various industries including automobile manufacturers.
IPC 8 full level
C21D 8/02 (2006.01); B22D 11/00 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C23C 2/06 (2006.01)
CPC (source: EP KR US)
B22D 11/001 (2013.01 - EP KR); C21D 8/0205 (2013.01 - EP KR); C21D 8/0226 (2013.01 - EP KR); C21D 8/0263 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR); C23C 2/02 (2013.01 - EP US); C23C 2/0224 (2022.08 - EP US); C23C 2/06 (2013.01 - EP KR); C23C 2/28 (2013.01 - EP US); C23C 2/29 (2022.08 - KR); C21D 2211/001 (2013.01 - EP); C21D 2211/005 (2013.01 - EP KR); C21D 2211/008 (2013.01 - EP KR)
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)
WO 2020227438 A1 20201112; AU 2020268370 A1 20211202; AU 2020268370 B2 20240613; BR 112021021467 A2 20220104; CA 3138889 A1 20201112; CN 113825846 A 20211221; EP 3966355 A1 20220316; JP 2022531669 A 20220708; KR 20220004213 A 20220111; MX 2021013567 A 20220401
DOCDB simple family (application)
US 2020031719 W 20200506; AU 2020268370 A 20200506; BR 112021021467 A 20200506; CA 3138889 A 20200506; CN 202080033753 A 20200506; EP 20728339 A 20200506; JP 2021565011 A 20200506; KR 20217040064 A 20200506; MX 2021013567 A 20200506