Title (en)

Process for manufacturing aluminium alloy material with excellent formability, shape fixability and bake hardenability.

Title (de)

Verfahren zur Herstellung eines Werkstoffes aus eines Aluminiumlegierung mit ausgezeichneter Pressverformbarkeit und Einbrennhärtbarkeit.

Title (fr)

Procédé de fabrication de matériau en alliage d'aluminium présentant une aptitude excellente au formage et durcissable lors de la cuisson du vernis.

Publication

EP 0480402 B1 19950215 (EN)

Application

EP 91117216 A 19911009

Priority

• JP 7709991 A 19910318
• JP 26950890 A 19901009

Abstract (en)

[origin: EP0480402A1] The present invention provides a process for manufacturing an aluminum alloy material which has excellent formability in press working, shape fixability and bake hardenability and is especially suitable for the manufacture of transport machinery, such as the body sheet material of automobiles. The process comprises conducting semi-continuous casting an alloy comprising, in weight percentage, from 0.4% to less than 1.5% of Si, from 0.3% to less than 0.5% of Mg and optionally further comprising at least one member selected from the group consisting of up to 0.20% of Cu, up to 0.20% of Mn and up to 0.20% of Cr with the balance consisting of Al and unavoidable impurities to prepare an ingot, rolling the ingot to a final sheet thickness, subjecting the heated sheet to solution heat treatment under specified conditions, allowing the sheet to hold still at room temperature, and heat-treating the sheet. The addition of 0.02% to 0.2% of V imparts a less anisotropy to the resulting alloy.

IPC 1-7

C22F 1/043; C22C 21/02

IPC 8 full level

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

CPC (source: EP)

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

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0480402 A1 19920415; EP 0480402 B1 19950215; DE 69107392 D1 19950323; DE 69107392 T2 19950608

DOCDB simple family (application)

EP 91117216 A 19911009; DE 69107392 T 19911009