Global Patent Index - EP 1195449 A3

EP 1195449 A3 20031217 - Precipitation hardening of an aluminium alloy

Title (en)

Precipitation hardening of an aluminium alloy

Title (de)

Ausscheidungshärten einer Aluminiumlegierung

Title (fr)

Durcissement par précipitation d'un alliage d'aluminium

Publication

EP 1195449 A3 20031217 (DE)

Application

EP 01890265 A 20010913

Priority

AT 15632000 A 20000914

Abstract (en)

[origin: EP1195449A2] Three-stage heating and cooling pretreatment, finally stabilizing the grain structure under reducing temperature, for at least 420 hrs, preferably for 1000 hrs, produces stabilized grain structure with good mechanical properties: hardness HB up to 65 (2.5/62.5/16); limiting expansion Rp0.2 up to 140 MPa, preferably 130 MPa; tensile strength Rm up to 270 MPa, preferably 240 MPa; and uniform expansion before area reduction exceeding 18%. If appropriate, after extraction of the component from the mold, it is precipitation-hardened at a temperature of 165 degrees C-190 degrees C, over an interval of 12-38 M.

IPC 1-7

C22F 1/05; C22C 21/08

IPC 8 full level

C22F 1/04 (2006.01)

CPC (source: EP)

C22F 1/04 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

EP 1195449 A2 20020410; EP 1195449 A3 20031217; EP 1195449 B1 20061213; EP 1195449 B3 20210317; AT 408763 B 20020325; AT A15632000 A 20010715; AT E348202 T1 20070115; DE 20101474 U1 20010628; DE 50111626 D1 20070125

DOCDB simple family (application)

EP 01890265 A 20010913; AT 01890265 T 20010913; AT 15632000 A 20000914; DE 20101474 U 20010129; DE 50111626 T 20010913