A method of manufacturing a formed aluminium alloy automotive structural part or a body-in-white (BIW) part of a motor vehicle, including the steps of: providing a rolled aluminium alloy bare or composite sheet product having a gauge of about 0.5 mm to 4 mm, wherein the sheet product includes at least one layer an AA7xxx-series aluminium alloy, the sheet product having been subjected to solution heat treatment and quenching followed by at least 1 day of natural ageing; subjecting the naturally aged sheet product to reversion annealing treatment, namely a heat treatment at a temperature between 100° C. and 350° C. during 0.1 to 60 seconds; optionally subjecting the heated sheet product to forced cooling operation; within 2 hours, preferably within 30 minutes, from the reversion annealing treatment, forming the sheet product to obtain a three-dimensionally formed automotive structural part or body-in-white (BIW) part.
PRODUCTION OF FORMED AUTOMOTIVE STRUCTURAL PARTS FROM AA7XXX-SERIES ALUMINIUM ALLOYS
2015-08-06
Patent
Electronic Resource
English
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / C22C Legierungen , ALLOYS / C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen |
Production of formed automotive structural parts from AA7XXX-series aluminium alloys
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