Pengaruh Variasi Media Cetakan Pasir, Cetakan Logam dan Pasir RCS (Resin Coated Sand ) Terhadap Hasil Coran Produk Tap Handle dari Bahan Perunggu (Bronze)

Putra Utama, Bobby Christian and , Patna Partono, ST, MT (2017) Pengaruh Variasi Media Cetakan Pasir, Cetakan Logam dan Pasir RCS (Resin Coated Sand ) Terhadap Hasil Coran Produk Tap Handle dari Bahan Perunggu (Bronze). 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 scrap, which is melted in the kitchen krusible, a variation of the mold used three types: wet sand molds, metal molds and mold RCS (Resin Coated Sand). To determine the shrinkage defects comparing dimensional objects with the original specimen results of each specimen, Porosity can be seen by looking for true density values calculated by referring to the standard ASTM E-252, testing Brinell hardness testing using the ASTM E10 standard, micro structure testing done with standard ASTM E3 and chemical composition testing performed by the ASTM E1251 standard. The percentage value of depreciation for the wet sand molds variation of 0,66%, 0,92% metal mold and to mold RCS (Resin Coated Sand) by 0,66%. The difference in shrinkage occurs because the conductivity of each mold to absorbing heat is different, so the higher conductivity makes the metal solidification fast and also affects a large grain size that is seen on the microstructure. At the porosity is obtained from the true density, wet sand mold ρ = 8,869, metal molds ρ = 8,481, and RCS (Resin Coated Sand) ρ = 8,768 the higher the true density value the material is solid. The density of the material associated with violence is also higher Brinell testing of prints obtained on wet sand at 75,576 BHN, amounting to 86,038 BHN metal mold and mold RCS (Resin Coated Sand) 70,436 BHN. The chemical composition of the bronze is found (Cu) 76,00%, (Pb) 16,20%, (Sn) 5,73%, (Zn) 1,40%, (Ni) 0,496%, (Cd) 0,0731% and other.

Item Type:	Karya ilmiah (Diploma)
Uncontrolled Keywords:	Bronze (Cu+Sn), mold, hardness, micro structure, chemical composition.
Subjects:	H Social Sciences > H Social Sciences (General)
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	BOBBY CHRISTIAN PUTRA UTAMA
Date Deposited:	10 Nov 2017 06:37
Last Modified:	10 Nov 2017 06:41
URI:	http://eprints.ums.ac.id/id/eprint/57516

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