EP 4076788 B1 20240515 - A 7XXX SERIES ALUMINUM ALLOYS INGOT AND A METHOD FOR DIRECT CHILL CASTING
Title (en)
A 7XXX SERIES ALUMINUM ALLOYS INGOT AND A METHOD FOR DIRECT CHILL CASTING
Title (de)
EIN BARREN AUS EINER ALUMINIUMLEGIERUNG DER SERIE 7XXX UND EIN VERFAHREN ZUM DIREKTEN KOKILLENGUSS
Title (fr)
LINGOT D'ALLIAGES D'ALUMINIUM DE LA SÉRIE 7XXX ET PROCÉDÉ DE COULÉE DIRECTE PAR REFROIDISSEMENT
Publication
Application
Priority
- US 201962951883 P 20191220
- US 2020065919 W 20201218
Abstract (en)
[origin: WO2021127378A1] Process control of intense stirring along a solidification front and adjustments in casting speeds during direct chill casting of 7xxx series alloys can decrease an ingot's cracking susceptibility. Intense stirring control is used to reduce the thickness of the solidification front, promote agglomeration of hydrogen gas rejected at the solidification front, remove impurities rejected at the solidification front, and improve grain size. Intense stirring control is used to operate at faster casting speeds without risk of increasing the thickness of the solidification front. Optional reheating during casting to promote dispersoid formation is used to generate a high-strength zone of dispersoid-strengthened solidified metal in the outer periphery of the ingot, which can further decrease the ingot's susceptibility to cracking.
IPC 8 full level
B22D 11/00 (2006.01); B22D 11/049 (2006.01); B22D 11/055 (2006.01); B22D 11/10 (2006.01); B22D 11/115 (2006.01); B22D 11/18 (2006.01); B22D 11/20 (2006.01)
CPC (source: EP KR US)
B22D 7/005 (2013.01 - US); B22D 11/003 (2013.01 - EP KR); B22D 11/049 (2013.01 - EP KR); B22D 11/055 (2013.01 - EP KR); B22D 11/10 (2013.01 - EP); B22D 11/115 (2013.01 - EP KR); B22D 11/182 (2013.01 - EP KR); B22D 11/202 (2013.01 - EP KR); B22D 27/02 (2013.01 - US); B22D 11/003 (2013.01 - 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 2021127378 A1 20210624; BR 112022010563 A2 20220823; CA 3163718 A1 20210624; CN 114867569 A 20220805; EP 4076788 A1 20221026; EP 4076788 B1 20240515; JP 2023506836 A 20230220; JP 7346743 B2 20230919; KR 102666365 B1 20240517; KR 20220100677 A 20220715; MX 2022007478 A 20220629; US 2023013141 A1 20230119
DOCDB simple family (application)
US 2020065919 W 20201218; BR 112022010563 A 20201218; CA 3163718 A 20201218; CN 202080088822 A 20201218; EP 20842788 A 20201218; JP 2022536647 A 20201218; KR 20227020246 A 20201218; MX 2022007478 A 20201218; US 202017757666 A 20201218