Global Patent Index - EP 1205567 B1

EP 1205567 B1 20050504 - Production of ultra-fine grain structure in as-cast aluminium alloys

Title (en)

Production of ultra-fine grain structure in as-cast aluminium alloys

Title (de)

Herstellung von einer ultrafeinen Korngefüge in Aluminium-Legierungen im Gusszustand

Title (fr)

Production de structure de grains ultrafins dans les alliages d'aluminium bruts de coulée

Publication

EP 1205567 B1 20050504 (EN)

Application

EP 01126694 A 20011108

Priority

US 71017500 A 20001110

Abstract (en)

[origin: EP1205567A2] A method of controlling grain size in as-cast aluminum alloy having the steps of a) providing a molten aluminum alloy including an alloying element selected from the group consisting of Ti, Sc, Zr, V, Hf, Nb and Y; b) adding a grain refiner to the molten aluminum alloy to form a melt; and c) solidifying the melt to form an ingot. The grain refiner includes Ti and B or C, and is added to the melt in an amount to yield the concentration in the melt of B or C from the grain refiner of about 0.003-0.010 wt. %. Grains in the as-cast aluminum alloy are about 200 microns or less in size.

IPC 1-7

C22C 1/03; C22C 21/00

IPC 8 full level

C22C 1/02 (2006.01); C22C 1/03 (2006.01); C22C 21/00 (2006.01)

CPC (source: EP)

C22C 1/026 (2013.01); C22C 1/03 (2013.01); C22C 21/00 (2013.01)

Designated contracting state (EPC)

DE FR GB NL

DOCDB simple family (publication)

EP 1205567 A2 20020515; EP 1205567 A3 20020605; EP 1205567 B1 20050504; CA 2361484 A1 20020510; DE 60110523 D1 20050609

DOCDB simple family (application)

EP 01126694 A 20011108; CA 2361484 A 20011108; DE 60110523 T 20011108