Abstract
Twin-roll casting (TRC) is a set up applied to manufacture sheets of aluminium alloys. In spite of huge potential, extreme centerline segregation emerges during casting. This segregation limits the range of alloys suitable for commercial applications. To enhance the quality of the TRC strips, another innovation– the melt-conditioning twin-roll casting (MCTRC) – has been used. Cold rolling followed by homogenization heat treatment of the MCTRC strip results in more uniform solute distribution across the thickness of the strip, leading to strips of higher quality as compared to the conventional TRC strip.
Kurzfassung
Das Twin-Roll-Casting (TRC) ist ein Verfahren zur Herstellung von Blechen aus Aluminiumlegierungen. Trotz des großen Potenzials kommt es beim Gießen zu einer starken Seigerung der Mittellinie. Diese Seigerung schränkt das Spektrum der für kommerzielle Anwendungen geeigneten Legierungen ein. Um die Qualität der TRC-Bänder zu verbessern, wurde eine weitere Entwicklung – das schmelzkonditionierende Twin Roll Casting (MCTRC) – eingesetzt. Kaltwalzen mit anschließender Homogenisierungswärmebehandlung des MCTRC-Bandes führt zu einer gleichmäßigeren Verteilung der gelösten Legierungselemente über die Dicke des Bandes, was im Vergleich zum herkömmlichen TRC-Band zu einer besseren Bandqualität führt.
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