Global Patent Index - EP 4190932 A1

EP 4190932 A1 20230607 - 6XXX SERIES ALUMINIUM ALLOY SHEETS, PLATES OR BLANKS WITH IMPROVED FORMABILTY

Title (en)

6XXX SERIES ALUMINIUM ALLOY SHEETS, PLATES OR BLANKS WITH IMPROVED FORMABILTY

Title (de)

BLECHE, PLATTEN ODER ZUSCHNITTE AUS EINER ALUMINIUMLEGIERUNG DER SERIE 6XXX MIT VERBESSERTER FORMBARKEIT

Title (fr)

TÔLES, PLAQUES OU ÉBAUCHES EN ALLIAGE D'ALUMINIUM DE LA SÉRIE 6XXX À FORMABILITÉ AMÉLIORÉE

Publication

EP 4190932 A1 20230607 (EN)

Application

EP 21211696 A 20211201

Priority

EP 21211696 A 20211201

Abstract (en)

The invention concerns a process for producing a sheet or a plate or a blank, comprising the following successive steps: (a) casting a 6xxx alloy comprising, in wt.%: Si: 1.25 - 1.45 ; Fe: ≤ 0.30 ; Cu: ≤ 0.15 ; Mn: 0.01 - 0.15 ; Mg: 0.25 - 0.40 ; Cr: 0.03 ; Ni: ≤ 0.04 ; Zn: ≤ 0.15 ; Ti: 0.01 - 0.10 ; other elements: < 0.05 each and < 0.15 in total ; rest aluminium; (b) heat treating; (c) hot rolling; (d) cold rolling; (e) optionally inter-annealing between hot rolling and cold rolling and/or during cold rolling and/or after cold rolling; (f) solution heat treating; (g) quenching; (h) optionally pre-aging; (i) shearing without any milling step.

IPC 8 full level

C22C 21/02 (2006.01); C22C 21/08 (2006.01); C22F 1/043 (2006.01); C22F 1/05 (2006.01)

CPC (source: EP)

C22C 21/02 (2013.01); C22C 21/08 (2013.01); C22F 1/043 (2013.01); C22F 1/05 (2013.01)

Citation (applicant)

  • JP 3872753 B2 20070124
  • JP 4495623 B2 20100707
  • SERGEY F. GOLOVASHCHENKO ET AL.: "Trimming and sheared edge stretchability of automotive 6xxx aluminum''", JOURNAL OF MATERIALS PROCESSING TECH., vol. 264, 2019, pages 64 - 75, XP085512049, DOI: 10.1016/j.jmatprotec.2018.09.001
  • NICHOLAS ROBERT KALWEIT: "thesis", 2017, UNIVERSITY OF MICHIGAN-DEARBORN, article "Edge Stretch Performance of 6DR1 Aluminum in Typical Automotive Blanking Conditions"
  • X.H. HU ET AL.: "Predicting tensile stretchability of trimmed AA6111-T4 sheets", COMPUTATIONAL MATERIALS SCIENCE, vol. 85, 2014, pages 409 - 419, XP028662080, DOI: 10.1016/j.commatsci.2014.01.015
  • QUOCHUNG B. LE ET AL.: "Analysis of sheared edge formability of aluminum''", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, vol. 214, 2014, pages 876 - 891, XP028669851, DOI: 10.1016/j.jmatprotec.2013.11.021
  • NAN WANG ET AL.: "Mechanism of fractureof aluminum blanks subjected to stretching along the sheared edge", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, vol. 233, 2016, pages 142 - 160, XP029466576, DOI: 10.1016/j.jmatprotec.2016.02.022

Citation (search report)

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

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4190932 A1 20230607; CA 3239615 A1 20230608; WO 2023099550 A1 20230608

DOCDB simple family (application)

EP 21211696 A 20211201; CA 3239615 A 20221130; EP 2022083823 W 20221130