PENGARUH KERAPATAN POLYSTYRENE FOAM TERHADAP MAMPU ALIR DAN KUALITAS CORAN PADUAN ALUMINIUM 356.1 YANG DICOR DENGAN METODE EVAPORATIVE
Abstract: Evaporative casting
model is a
casting method using polystyrene foam
as a mold pattern is embedded in
the molding sand. Molten metal will fill the mold pattern after pattern
evaporates due to heat molding. Evaporative casting has good accuracy
for objects that
are produced in
accordance with the
pattern established molds. Objects with large size and complexity can be
produced in this way. The study was aimed to observe the effectof density
polystyrene foam, the thickness of
the mold pattern
to fluidity, microstructure, and
mechanical properties of 356.1 aluminum alloy casted by evaporative
casting method. The aluminum alloy 356.1 was melted in a crucible furnace, then
performed at a temperature of 740oC castings,
using polystyrene foam
mold pattern density variation 0007, 0018 and 0020 g/cm3, and a thickness of 3, 5, 7,
and 11 mm, which solidified in
the container which
uses silica sand molds
with sand diameter distribution
variation <0.2,> 0.2 – <0.5 and> 0.5 –<0.8 mm. Increasing the
density of polystyrene
foam to reduce
the fluidity. Able
best fluidity obtained at
the lowest density
of polystyrene foam
and the highest casting thickness.
Capable of fluidity
up to 116%
decreased with increasing density of foam polystyrene.
Increased thickness ofthe mold pattern to a fluidity increase of
185%. 60.8 VHN
casting hardness value
reached on the
type of polystyrene foam
mold pattern density
0007 g/cm3, a
decrease of 5.3%
with increasing density polystyrene
foam mold pattern
g/cm3.The strength 0020 147.7 MPa tensile, for casting with a
density of polystyrene foam mold pattern
g/cm3 0007 , a
decrease of 0.5%
with increasing density polystyrene foam mold pattern 0020
g/cm3.
Penulis: Ivan Junaidy Abdul
Karim
Kode Jurnal: jptmesindd100135
