Global Patent Index - EP 1264903 A2

EP 1264903 A2 2002-12-11 - Refining of aluminium casting alloys by boron addition

Title (en)

Refining of aluminium casting alloys by boron addition

Title (de)

Reinigung von Aluminium-Gusslegierungen mittels Zugabe von Bor

Title (fr)

Affinage des alliages d'aluminium de fonderie par addition de bore

Publication

EP 1264903 A2 (DE)

Application

EP 02009964 A

Priority

  • DE 10127753 A
  • DE 10157722 A

Abstract (en)

Removing impurity alloying components from an aluminum cast alloy comprises completely melting the cast alloy; mixing with 0.005 weight % boron for the purpose of cleaning; casting the melt for a time sufficient for the boron to react with the impurity alloying components; and removing or retaining solids produced from the melt before or during casting. Preferred Features: Boron is added in the form of an aluminum-boron pre-alloy. Reaction time is at least one hour. The aluminum cast alloy is further treated for the purpose of grain refinement.

Abstract (de)

Das Verfahren zur Beseitigung von störenden Legierungsbestandteilen aus einer Aluminium-Gusslegierung weist folgende Schritte auf: vollständiges Aufschmelzen der Aluminium-Gusslegierung, Zumischen von Bor bis zu einem in der Schmelze verbleibenden Borgehalt von maximal 0,005 Gew.-%, Verweilen der Schmelze bis zum Vergießen für eine zur Reaktion des Bors mit den störenden Legierungsbestandteilen erforderliche Mindestdauer und Entfernen oder Zurückhalten entstandener Feststoffe aus der Schmelze vor oder während ihres Vergießens.

IPC 1-7 (main, further and additional classification)

C22B 21/06; C22C 1/02; C22C 21/00

IPC 8 full level (invention and additional information)

C22B 21/06 (2006.01); C22C 1/02 (2006.01); C22C 1/03 (2006.01)

CPC (invention and additional information)

C22C 1/03 (2013.01); C22B 21/06 (2013.01); C22B 21/062 (2013.01); C22C 1/026 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT SE

EPO simple patent family

EP 1264903 A2 20021211; EP 1264903 A3 20030827; EP 1264903 B1 20060920; DE 50208178 D1 20061102; ES 2271139 T3 20070416

INPADOC legal status


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