Production of Modifier for Al-Si Alloys
Ibrahim Goksel Hizli Rasit Sezer Özen Gürsoy2 Selim Ertürk Cüneyt Arslan Derya Dışpınar
AbstractAl-Si alloys are mostly used in casting industry for automotive parts. In this alloy, silicon need to be modified to obtain fine fibrous particles instead of coarse needles. Strontium master alloys have been used as modifier in Al-Si alloys for decades [1,2]. The modification was first discovered in 1921 by Aladar Pacz and his unique method was patented. In the Pacz study, it has been shown that Al-Si alloys with Si content of 5-15% are modified with alkali fluoride, preferably sodium fluoride fluxes. Closset and Gruzleski, have shown that strontium can be used as a modifier in silicon-containing alloys [1].