Abstract:
luminum rongsokan has considerable potential as an engineering material for making
an engine element. During this time aluminum rongsok still not utilized by manufacturing
industry as product. One technology to make products from Al rongsok is metal foundry
technology. Al rongsok can be recycled and potentially produce various component
products. This study aims to determine the hardness and tensile strength of evaporative
foundry results. The furnace for smelting uses the furnace krusibel with charcoal wood
fuel. Material for casting used Al-19,6Si-2,5Cu- 2,3Zn rongsok alloy. The foundry method
used is evaporative casting. Styrofoam as a pattern dumped in the sand print. This
method will produce castings that match the pattern of styrofoam formed. Al alloy is
melted in crusible furnace then poured with variation of casting temperature 650, 660,
670 and 680 oC. The results showed that the pour temperature had an effect on the value
of hardness and tensile strength. At temperatures above 650 oC, the value of the hardness
decreases with the increase of pouring temperature. At temperatures above 650 oC the
tensile stress increases with the increase in pouring temperature.
