Analisis Jarak Titik Pengukuran Temperatur Tuang pada Kualitas Coran Aluminium Daur Ulang
Abstract
The melt exhibits non-uniform temperature in a crucible at the surface, middle, and bottom. Thus, selecting the proper measurement location is essential since it affects the casting quality. This study investigates the proper temperature measurement location of recycled aluminum cans in investment casting. The selection was made based on casted samples' tensile strength and porosity. The pattern was prepared using the polylactic acid mold, then coated by dipping it in ceramic slurry, and then dewaxed at 120ºC. The aluminum cans were heated up to 700ºC, and the temperature was measured at 50 mm from the crucible bottom. Finally, the melt was poured into a 100ºC ceramic shell. The processes were repeated with the measurement at 125 and 200 mm. The samples were characterized through tensile tests and porosity measurements. The results show that the optimum tensile strength (112.97 MPa) and minimum porosity (6.367%) were found in the 125 mm sample.
Abstrak
Temperatur logam cair tidak seragam di permukaan, tengah, dan dasar kowi. Pemilihan lokasi pengukuran yang tepat sangat penting karena mempengaruhi kualitas pengecoran. Studi ini menyelidiki titik pengukuran suhu kaleng aluminium daur ulang pada pengecoran investment. Pemilihan dilakukan berdasarkan kekuatan tarik dan porositas sampel yang dicor. Pola dibuat menggunakan cetakan using polylactic acid. Pola dilapisi dengan mencelupkannya ke dalam bubur keramik kemudian didewaxing pada temperatur 120ºC. Kaleng aluminium dipanaskan hingga 700ºC, suhu diukur pada 50 mm dari dasar kowi. Logam cair dituangkan ke dalam cetakan keramik saat temperaturnya 100ºC. Proses diulang dengan pengukuran untuk lokasi 125 dan 200 mm. Sampel dikarakterisasi melalui uji tarik dan pengukuran porositas. Hasil menunjukkan kekuatan tarik optimum (112,97 MPa) dan porositas minimum (6,367%) ditemukan pada sampel dengan lokasi pengukuran temperatur 125 mm dari dasar kowi.
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References
Sutiyoko, “Metode Pengecoran Lost Foam Menjawab Tantangan Dunia,” J. Foundry, vol. 3, pp. 21–29, 2013.
F. P. Putra and R. Siswanto, “Pengaruh Temperatur Tuang Terhadap Porositas, Stuktur Mikro Dan Kekerasan Dari Alumunium Rongsok Velg Menggunakan Pengecoran Evaporatif,” Jtam Rotary, vol. 3, no. 2, pp. 219–232, 2021, doi: 10.20527/jtam_rotary.v3i2.4119.
E. Setyani and M. A. Irfai, “Studi Temperatur Tuang Terhadap Kekuatan Tarik Paduan Al-Si dengan Menggunakan Cetakan Pasir,” J. Tek. Mesin, vol. 6, no. 1, pp. 5–9, 2018.
W. L. K. Apris, D. Masnur, and M. Dalil, “Studi Karakteristik Mekanik dan Struktur Mikro Coran Aluminium Minuman Kaleng” vol. 3, no. 2, 2016.
J. Campbell, Castings, 2nd ed. Burlington MA 01803 First: Butterworth-Heinemann, 2003.
R. Siswanto, A. Ghofur, and K. A. K. Kepakisa, “Analisis Porositas dan Kerasan Paduan Al-12,6%Si dengan Variasi Waktu Tunggu dalam Cetakan dan Media Pendingin Hasil Pengecoran Evaporative,” Jukung (Jurnal Tek. Lingkungan), vol. 4, no. 1, pp. 72–81, 2018, doi: 10.20527/jukung.v4i1.4663.
Lutiyatmi and M. Sonianto, “Peleburan Aluminium dengan Variasi Suhu 680 ˚C dan 715 ˚C,” J. Foundry Politek. Manufaktur Ceper, vol. 5, no. 1, pp. 1–7, 2022.
Y. A. Cengel, “Heat Transfer: A Practical Approach,” Mc Graw-Hill, pp. 785–841, 2003
Adri and D. Masnur, “Studi kekasaran permukaan produk investment casting aluminium minuman kaleng bekas dengan parameter temperatur tuang dan ukuran butir lempung,” J. Online Mhs., vol. 3, no. 1, pp. 1–6, 2016.
R. Rosandi and D. Masnur, “Influence Of Pouring Temperatures to Fluidity Of Aluminium Scrap Cans With Investment Casting Using Natural Clays as Mould Materials,” Jom FTEKNIK, vol. 3, no. 2, pp. 3–5, 2016.
J. William D. Callister, Fundamentals of Materials Science and Engineering An Interactive, 5th ed. New York: John Wiley & Sons, Inc., 2001.
J. Campbell, Complete Casting Handbook. 2015.
S. N. Aqida, M. I. Ghazali, and J. Hashim, “Effect of Porosity on Mechanical Properties of Metal Matrix Composite: An Overview,” J. Teknol., pp. 17–32, 2012, doi: 10.11113/jt.v40.395.
L. Anggraini and Sugeng, “Analysis of Porosity Defects in Aluminum as Part Handle Motor Vehicle Lever Processed by High-pressure Die Casting,” IOP Conf. Ser. Mater. Sci. Eng., vol. 367, no. 1, 2018, doi: 10.1088/1757-899X/367/1/012039.
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