There are several criteria which characterize melt cleanliness, e.g. hydrogen, alkali metal and the non-metallic inclusion content. Due to the increasing quality demand of materials for high end applications (e.g. the aerospace industry) melt cleanliness has to be improved. Beside the in-line melt treatment, which is a very important step for rising the melt quality, the content of impurities in casting/holding furnaces has to be reduced before to enhance efficiency of in-line operations. This paper describes the optimization possibilities for the casting furnace process especially the impeller gas purging treatment. Based on CFD-calculations, a methodology for the melt treatment of AA 7075 has been investigated and applied to the real process. Out of this, key factors can be derived and will be discussed.
Optimisation of the melt quality in casting/holding furnaces
Optimierung der Schmelzequalität in Gieß-/Warmhalteöfen
2008
6 Seiten, 22 Quellen
Conference paper
English
Aluminiumgusslegierung , Aluminiumherstellung , Anwendung in der Luft- und Raumfahrt , Gasbrenner , Kurvenanpassung , Metallschmelze , metallurgischer Ofen (NE-Metalle) , nichtmetallischer Einschluss , Ofen mit Gasfeuerung , Ofenführung , Pigment , Qualitätsverbesserung , Raumfahrtindustrie , Reinheitsgrad , Schmelzbehandlung , Verfahrensoptimierung , Warmhalteofen
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