PERILAKU IMPAK DAN POROSITAS PADUAN Al-Si-Mg PADA PENGECORAN SENTRIFUGAL AKIBAT TEMPERATUR PEMANASAN AWAL CETAKAN
Abstract: Aluminum is
widely used as raw materials
in engineering because
this material is
often used to replace other metals with the same function. This occurs
when the product must have properties
such as light, good heat conductivity, and low melting point. An example
of making Aluminium product is
centrifugal casting process.
Centrifugal casting is
a method of
casting metal by pouring
metal into a mold that
rotates with a
certain speed. This
study aims to determine the effect of preheating
temperature of the mold of on impact strength and porosity of aluminum alloy
Al-Si-Mg in centrifugal
casting. The experiments
were carried out with
and without mold pre-heating. The temperature of preheated mold were 100º C, 200º C, 300º C, 400º
C. The data obtained were analyzed statistically and theoretically. The results
showed that the increasing of the preheating temperature of the mold
significantly affects the value of impact strength of
aluminum alloy Al-Si-Mg.
The highest value
of impact strength
and the lowest porosity were
obtained in the
preheating temperature of
400 º C.
This is due
to reduced temperature gradient
between the temperature
of molten metal
and the mold
temperature resulting in a slower cooling rate in a homogeneous
suspension.
Keywords: centrifugal casting,
preheating the mold, aluminum alloy Al-Si-Mg, impact strength, porosity
Penulis: Putu Hadi Setyarini
Kode Jurnal: jptmesindd110245
