Studi Pengaruh Metode Pengecoran Terhadap Density, Porositas, Kekerasan dan Struktur Mikro

Eka Permana, Galang and -, Patna Partono, S.T., M.T. (2020) Studi Pengaruh Metode Pengecoran Terhadap Density, Porositas, Kekerasan dan Struktur Mikro. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

The purpose of this research is to examine the effect of casting method on density, porosity, hardness and microstructure. The material used in this research is recycled Aluminum from used pistons. This casting process uses sand casting, gravity die casting and pressure die casting methods by testing the density, porosity with the camera, chemical composition with the ASTM E1251-94 standard emmision spectometry, microstructure with ASTM E384-11 standard metallographic microscope and hardness with the test equipment ASTM standard hardness Vickers E3-11. Chemical composition test results with materials from used pistons containing chemical composition of Al 87.13%, Si 6.14%, Zn 2.87% based on ASTM B85-03 standard Standard Specification for Aluminum-Alloy Die Casting Aluminum is almost similar to the type of Aluminum C433.0. Sand casting has a very small density value with 2507.02 kg/m3 with the most porosity defects, the gravity die casting method has a smaller density value with 2553.76 kg/m3, the pressure die casting method has a density value which is high with 2660.81 kg/m3 with the least porosity defects. This can be concluded from the observation that the higher the porosity of the density value, the less porosity that occurs. The hardness test results using the sand casting method have a hardness value of 102.74 HVN, gravity die casting has a hardness value of 113.22 HVN, the pressure die casting has a hardness value of 123.46 HVN. From these data it shows that the casting method influences the hardness value on Aluminum cast products. Where the value of hardness is influenced by density and porosity that occur. Sand casting method has a more tenuous and larger β (Si) phase, gravity die casting method has β (Si) phase starting to look small and evenly distributed, pressure die casting method has dense and β (Si) phase which is dense and its size to shrink.

Item Type:	Karya ilmiah (Skripsi)
Uncontrolled Keywords:	Sand casting, Gravity die casting, Pressure die casting, Aluminium
Subjects:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	Unnamed user with username d200171148
Date Deposited:	05 Feb 2020 06:35
Last Modified:	05 Feb 2020 06:35
URI:	http://eprints.ums.ac.id/id/eprint/80311

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