Study on Al-Zr alloys (3rd Report)

Abstract

As shown in the previous studies, when the content of Zr was increased for raising the recrystallization temperature of Al-Zr alloys, higher casting temperature and more rapid cooling were required in accordance with the content. Accordingly, it was considered difficult to produce an industrial size of homogeneous ingot of Al-Zr alloys.The present study explained that the alloy, having lower content of Zr (lower than 0.3wt%), could produce stable and homogeneous ingot by continuous casting, and the recrystallization temperature was made higher by the effect of proper intermediate heat treatments.