Hutahaean, Gunawan P.S. (2015) Pengaruh Penambahan Seng (Zn) Terhadap Kekerasan Dan Struktur Mikro Paduan Tembaga-Seng Melalui Proses Pengecoran. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tembaga banyak digunakan di industri. Tembaga
memiliki kekuatan tarik yang tinggi hingga 390 Mpa (N/mm2).
Tembaga memiliki sifat termal dan konduktivitas listrik yang
baik, mudah ditempa, dapat di daur ulang, dan tahan korosi.
Seng merupakan salah satu logam yang dapat dipadukan dengan
tembaga. Seng banyak digunakan untuk coating anoda,
memproteksi baja dari korosi, dan pengecoran. Paduan tembaga
dan seng adalah kuningan (Cu-Zn). Material kuningan memiliki
sifat tahan korosi, kekuatan tinggi, kemampuan mesin yang baik.
Penelitian ini bertujuan untuk menganalisi pengaruh
penambahan seng terhadap kekerasan dan struktur mikro paduan
tembaga-seng dengan variasi penambahan seng sebesar 32, 34,
36, dan 38 persen berat (%b) . Pengecoran dilakukan dengan
meleburkan logam dalam tungku gas pada temperatur 1100ºC
dan waktu penahanan 1 jam. Setelah itu logam cair didinginkan
di dalam tungku gas. Pengujian yang digunakan dalam penilitian
ini adalah spektroskopi dispersi energi sinar-X (EDS/EDX),
difraksi sinar-X (XRD), pengujian sifat kekerasan, dan
metalografi. Sifat kekerasan paduan Cu-Zn menunjukkan
peningkatan seiring penambahan Seng. Pengamatan metalografi
menunjukkan struktur mikro fasa alfa dan beta. Semakin
bertambahnya seng maka ukuran butir alfa akan mengalami
penurunan. ========== Copper is widely used in industrial. Tensile strength of
copper is up to 390 Mpa (N/mm2). Copper have good thermal
behavior and electrical conductivity, easy to machining,
recycleable, and has good corrosion ressitance. Zinc is one of
that mostly used as alloy of copper. According to its application,
zinc is generally used for anoda coating to protect steel from
corrosion attack, and casting. The blend of copper and zinc
produce brass metal (Cu-Zn). The properties of brass are good
corrosion ressitance, high strength, and good machineability.
This research is to study the effect of zinc addition on hardness
and microstructure of copper-zinc with zinc addition variation 32,
34, 36, and 38 (wt%). Metal Casting started with melted the metal
in gas furnace at 1100ºC and holding for an hour. After the metal
has been melted, it cooled at room temperature in the gas
furnace. The examinations that used in this research are Energy
Dispersive X-ray Spectroscopy (EDS/EDX), X-Ray Diffraction
(XRD), hardness test, and metalography. The hardness of Cu-Zn
alloy increase during the addition of Zinc. In metallographic
observation the phase that appear are alpha and betha phase.
The grain size of alfa will decrease as long as the addition of
Zinc.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 671.2 Hut p |
| Uncontrolled Keywords: | Tembaga, Seng, Pengecoran, Sifat kekerasan, Struktur mikro, Copper, Zinc, Casting, Hardness, Microstructure |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.42 Hardness properties and tests. Hardness--Testing. T Technology > TP Chemical technology > TP1151 Special molding and casting processes |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 21 Mar 2019 08:49 |
| Last Modified: | 21 Mar 2019 08:49 |
| URI: | http://repository.its.ac.id/id/eprint/62564 |
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