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All Journal ASEAN Journal of Systems Engineering Jurnal Energi Dan Manufaktur
Suyitno -
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Energy Engineering Industrial & Manufacturing Engineering

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STUDY KOMPARASI LOST FOAM DAN KONVENSIONAL CASTING PRODUK DISC BRAKE Sumeru Yoso; Suyitno -
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Disc brake component is a vital component with gray cast iron base material, it’s also fast lasting wearing part, so it has be replaced often. The disc brake replacement component in a local market is being supplied by the small scale local metal casting industries have the same quality as the genuine part.Disc brake making process is utilizing casting method inserting RCS core between drag and coup, than metal molten poured inside mold. The problem of this method is the product result often have gas defect because the gas that occur from the mold in casting process cannot be released perfectly, and then trapped in the metal molten caused by permeability or the gas flow in the green sand mold is not good enough.Ventilating disc brake making is not utilizing evaporative casting method or lost foam casting yet at the moment so it need to be research for the gains and the losses between the casting result using conventional method and lost foam casting method, considering that there’s no research for the disc brake component yet as far.This research will give many benefits to know that the thin Styrofoam pattern construction’s of the disc brake, with quit complicated ventilation would not be strong enough to sustain the dry sand mold on the pattern so it will be collapse earlier before the metal molten filled the cavity from the pattern, but it will make good result if it’s combined with the RCS core using. The time duration of the dry sand mold and the re-using will be faster than the conventional casting which using 2 underside mold or drag and upside mold or coup using the green sand.
Efek Dendrite Arm Spacing terhadap Sifat Mekanis Paduan Perunggu Cu-20%Sn I Ketut Gede Sugita; R. Soekrisno; I Made Miasa; Suyitno -
Jurnal Energi Dan Manufaktur Vol 4, No.2 Oktober 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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The purpose of this work is to investigate the effect of dendrite arm spacing on mechanical properties bronze20%Sn alloys The commercial pure copper and tin were melted in crucible furnace at temperature 1000oC. The molten metalwas casted in permanent moulds which have variation temperature, i.e. 35oC, 200oC, 400oC. The history of coolingtemperature on castings was recorded using a computer aided data acquisition Lab view 8.2 system.The microstructure and mechanical properties of this alloy have been investigated. The results of this researchindicate that decreasing the mould temperature affected on increasing solidification rate that caused to reduce thesolidification time. On the other hand, the difference of solidification rate have effected on microstructure forms. Thedendrite arm spacing (DAS) decreases with increasing solidification rate. DAS affected on mechanical properties i.e.ultimate tensile strength and hardness as cast. The mechanical properties increase with decreasing DAS.
Co-Authors I Ketut Adi Sugita I Made Miasa R. Soekrisno Sumeru Yoso