Sugondo, Bagus and , Patna Partono, S.T., M.T. (2024) Pengaruh Variasi Bentuk Penampang Saluran Turun Pada Pengecoran Logam Alumunium Terhadap Penyusutan, Density, Kekerasan dan Struktur Mikro Dengan Metode Investment Casting. Skripsi thesis, Universitas Muhammadiyah Surakarta.
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Abstract
The down channel is the first channel that functions to flow metal from the pouring cup to the inlet channel during the casting process. This study aims to determine the effect of variations in the shape of the down channel cross-section on the chemical composition, shrinkage, density, hardness, and microstructure. The raw material used during the casting process is Aluminum. Investment casting is a research method used in this study, with variations in the shape of the down channel cross-section used, namely square, triangle, and circle. Then shrinkage, deviation, density, hardness, and microstructure tests were carried out. The results of the chemical composition analysis, the sample studied was dominated by the element Aluminum (Al) 97.18%. The presence of alloying elements such as Silicon (Si) 0.735%, Iron (Fe) 0.755%, Copper (Cu) 0.287%, and Magnesium (Mg) 0.777% in small amounts indicate that this sample is an Aluminum alloy. The highest average shrinkage results were found in the triangular descending channel at 3.76% followed by the circular descending channel at 2.49%, and the lowest in the square descending channel at 1.80%. The highest average deviation results were found in the triangular descending channel at 14.42% followed by the circular descending channel at 13.87%, and the lowest in the square descending channel at 11.93%. The higher the density value of the material, the lower the porosity. This is evidenced by the highest density of the square descending channel (4.18gr/cm3) and followed by the circular descending channel (3.23 gr/cm3) and the triangular descending channel (3.10 gr/cm3). Vickers hardness also showed similar results, with the square descending channel having the highest hardness value (66.80VHN). The right descending channel shape will produce better quality casting products. The optimal flow rate will minimize defects and increase material hardness.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Aluminum, Foundry, Investment Casting, Down Channel, Depreciation, Density, Microstructure, Chemical Composition |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | BAGUS SUGONDO |
| Date Deposited: | 19 Nov 2024 08:41 |
| Last Modified: | 19 Nov 2024 08:41 |
| URI: | http://eprints.ums.ac.id/id/eprint/129022 |
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