Pengaruh Variasi Media Cetakan Pasir, Cetakan Logam Dan Cetakan RCS ( Resin Coated Sand ) Terhadap Produk Coran Alumunium

Utomo, Adam Hananto and , Patna Partono, ST, MT. (2016) Pengaruh Variasi Media Cetakan Pasir, Cetakan Logam Dan Cetakan RCS ( Resin Coated Sand ) Terhadap Produk Coran Alumunium. Diploma thesis, Universitas Muhammadiyah Surakarta.

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Abstract

The use of printed material in the cast product has the nature and character of its own. These properties greatly affect the quality of the cast product. The purpose of this study was to determine the effect of variations in the mold of the quality of the cast, cast defects and hardness. This study uses aluminum used or former, which melted in the kitchen krusible, a variation of the mold used three types: sand molds, metal molds and mold RCS (Resin Coated Sand). To determine the shrinkage defects dimensional objects compare the original with the results of specimens of each specimen mold. Defects porosity can be seen by looking for value calculation of density guided by the standard ASTM E-252, hardness testing using a test Brinell with ASTM E10, testing microstructure done with standard ASTM E3 by viewing a specimen under a microscope and chemical composition testing done with standard ASTM E1251 argon gas-fired way to the surface of the specimen, so the result will be read on a computer. The percentage value of depreciation for the wet sand molds variation of 0.61%, 0.64% metal mold and to mold RCS (Resin Coated Sand) by 0.59%. The research result of depreciation show that the metal mold has a shrinkage value of high and low of RCS (Resin Coated Sand) and mold the wet sand between the two metal molds and mold RCS (Resin Coated Sand) shrinkage occurs because the conductivity of each mold to absorb heat so the higher conductivity makes the metal solidification fast and also affect the large grains are seen on the microstructure, rapid freezing to make the grain to be small with an elongated shape and the distance between the grain elevator. At the porosity is obtained from the density, wet sand mold ρ = 2.513, metal molds ρ = 2.597 and RCS (Resin Coated Sand) ρ = 2.506 density, the higher the value of the material is a little more dense and porosity. The density of material related to violence are also higher, obtained on wet sand molds Brinell testing at 58.256 BHN, amounting to 61.219 BHN metal mold and mold RCS (Resin Coated Sand) 57.124 BHN. The chemical composition of the material was found elements (Al) 91.43% (Si) 4.07%, (Zn) 2.13%, (Fe) 1.76%, (Cu) 0.147%, (Cr) 0.175% and the element more so than the elements present this material include metal aluminum silicon alloy (Al-Si).

Item Type:	Karya ilmiah (Diploma)
Uncontrolled Keywords:	alumunim (Al), cetakan, kekerasan, komposisi kimia, strktur mikro
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	ADAM HANANTO UTOMO
Date Deposited:	05 Jan 2017 02:59
Last Modified:	09 Jan 2017 03:37
URI:	http://eprints.ums.ac.id/id/eprint/48264

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