EP 3807434 A1 20210421 - METHOD OF MANUFACTURING A 7XXX-SERIES ALUMINIUM ALLOY PLATE PRODUCT HAVING IMPROVED FATIGUE FAILURE RESISTANCE
Title (en)
METHOD OF MANUFACTURING A 7XXX-SERIES ALUMINIUM ALLOY PLATE PRODUCT HAVING IMPROVED FATIGUE FAILURE RESISTANCE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES PLATTENPRODUKTS AUS ALUMINIUMLEGIERUNG DER SERIE 7XXX MIT VERBESSERTER ERMÜDUNGSBRUCHFESTIGKEIT
Title (fr)
PROCÉDÉ DE FABRICATION D'UN PRODUIT EN PLAQUE D'ALLIAGE D'ALUMINIUM DE SÉRIE 7XXX AYANT UNE RÉSISTANCE AMÉLIORÉE À LA RUPTURE PAR LA FATIGUE
Publication
Application
Priority
- EP 18177389 A 20180612
- EP 2019064719 W 20190605
Abstract (en)
[origin: WO2019238509A1] The invention relates to a method of manufacturing an 7xxx-seriesaluminium alloy plate product having improved fatigue failure resistance, the method comprising the steps of (a) casting an ingot made of an aluminium alloy of the 7xxx-series comprising (in wt.%): Zn 5 to 9, Mg 1 to 3, Cu 0 to 3,balance aluminium and incidental elements and impurities;(b) homogenizing and/or preheating the cast ingot; (c) hot rolling the ingot into a plate product by rolling the ingot with multiple rolling passes, characterized in that when the intermediate thickness of the plate is between 80 and 220 mm,at least a high reduction hot rolling pass is carried out with a thickness reduction of at least 25%,wherein the plate product has a final thickness of less than 75 mm. The invention is also related to an aluminium alloy plate product and an aerospace structural member produced by this method.
IPC 8 full level
C22C 21/10 (2006.01); C22F 1/053 (2006.01)
CPC (source: EP KR RU US)
B22D 7/005 (2013.01 - US); C21D 8/0226 (2013.01 - US); C21D 9/46 (2013.01 - US); C22C 21/10 (2013.01 - EP KR RU US); C22F 1/053 (2013.01 - EP KR RU)
Citation (search report)
See references of WO 2019238509A1
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 2019238509 A1 20191219; BR 112020023249 A2 20210223; CA 3100242 A1 20191219; CA 3100242 C 20230808; CN 112262223 A 20210122; CN 112262223 B 20230214; EP 3807434 A1 20210421; EP 3807434 B1 20220914; ES 2929839 T3 20221202; JP 2021526591 A 20211007; JP 7282106 B2 20230526; KR 102547038 B1 20230626; KR 20210020992 A 20210224; PT 3807434 T 20221006; RU 2757280 C1 20211012; US 2021246523 A1 20210812
DOCDB simple family (application)
EP 2019064719 W 20190605; BR 112020023249 A 20190605; CA 3100242 A 20190605; CN 201980039243 A 20190605; EP 19729715 A 20190605; ES 19729715 T 20190605; JP 2020569182 A 20190605; KR 20217000323 A 20190605; PT 19729715 T 20190605; RU 2020140617 A 20190605; US 201916973980 A 20190605