Karakteristik Fluiditas Hasil Pengecoran Al-7Si Metode Sand Casting Akibat Variasi Temperatur Tuang dan Tebal Saluran

Abstrak

Abstract
Al-7Si alloy is a widely used alloy in automotive and engine components. Al-Si alloys have excellent castability especially at
5-13% silicon content. The sand casting method is carried out by pouring liquid metal into a prepared sand mold. Pouring
temperature is very influential in the casting process. Fluidity is the ability to flow liquid metal in the mold cavity. This research
uses the fluidity test piece method with variations in mold channel cavity thickness of 1.5; 2; 3; 4 and 5 mm. Pouring
temperature variations of 750; 850 and 950°C. Fluidity increases in flow length with each increase in channel thickness and
pouring temperature. The lowest fluidity occurs at a channel cavity thickness of 1.5 mm with a flow length of 10.6 mm at a
casting temperature of 750°C and the highest fluidity occurs at a channel cavity thickness of 5 mm with a flow length of 470
mm at a casting temperature of 950°C.
Keywords: Al-7Si, casting temperature, channel thickness, fluidity