Pratama, Dimas Widya Pratama (2026) Analisa Pengaruh Variasi Tekanan Kompaksi Terhadap Densitas, Porositas dan Kekerasan Spesimen dari Limbah Laser Cutting dengan Metode Metalurgi Serbuk. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Limbah hasil proses laser cutting berupa partikel logam berukuran kecil memiliki potensi untuk dimanfaatkan kembali sebagai bahan baku melalui metode metalurgi serbuk. Penelitian ini bertujuan untuk menganalisis pengaruh variasi tekanan kompaksi terhadap densitas, porositas, dan kekerasan spesimen yang dibuat dari limbah laser cutting ST41. Variasi tekanan kompaksi yang digunakan adalah 400 MPa, 500 MPa, dan 600 MPa. Serbuk limbah laser cutting dicampur dengan binder, kemudian dikompaksi menggunakan punch dan die, dilanjutkan dengan proses debinding pada temperatur 480°C selama 30 menit dan sintering pada temperatur 1100°C selama 30 menit. Karakterisasi yang dilakukan meliputi pengukuran Green Density dan Sintered Density, analisis porositas menggunakan perangkat lunak ImageJ, pengujian kekerasan Rockwell A (HRA), serta analisis statistik menggunakan One-Way ANOVA. Hasil penelitian menunjukkan bahwa variasi tekanan kompaksi berpengaruh signifikan terhadap karakteristik spesimen hasil metalurgi serbuk. Peningkatan tekanan kompaksi dari 400 MPa menjadi 500 MPa meningkatkan densitas, menurunkan porositas, dan menghasilkan nilai kekerasan yang lebih tinggi. Namun, peningkatan tekanan hingga 600 MPa tidak memberikan peningkatan sifat material yang berarti akibat terbentuknya pori tertutup (closed porosity) dan terjadinya fenomena spring-back yang menghambat proses densifikasi selama sintering. Tekanan kompaksi sebesar 500 MPa merupakan kondisi optimum karena menghasilkan densitas tertinggi, porositas terendah, dan kekerasan terbaik. Penelitian ini menunjukkan bahwa limbah laser cutting ST41 berpotensi dimanfaatkan sebagai bahan baku alternatif melalui metode metalurgi serbuk sehingga dapat mendukung efisiensi penggunaan material dan pengurangan limbah pada industri manufaktur.
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Fine metallic waste generated from the laser cutting process has the potential to be reused as a raw material through powder metallurgy. This study aimed to analyze the effect of compaction pressure variation on the density, porosity, and hardness of specimens produced from ST41 laser cutting waste. The compaction pressures applied were 400 MPa, 500 MPa, and 600 MPa. The laser cutting waste powder was mixed with a binder, compacted using a punch and die, followed by a debinding process at 480°C for 30 minutes and sintering at 1100°C for 30 minutes. The characterization included Green Density and Sintered Density measurements, porosity analysis using ImageJ software, Rockwell A (HRA) hardness testing, and statistical analysis using One-Way ANOVA. The results showed that compaction pressure significantly affected the characteristics of the powder metallurgy specimens. Increasing the compaction pressure from 400 MPa to 500 MPa improved density, reduced porosity, and increased hardness. However, increasing the pressure to 600 MPa did not result in further improvement due to the formation of closed porosity and the occurrence of spring-back, which inhibited the densification process during sintering. A compaction pressure of 500 MPa was identified as the optimum condition, producing the highest density, the lowest porosity, and the best hardness performance. These findings demonstrate that ST41 laser cutting waste can be effectively recycled as an alternative raw material through powder metallurgy, thereby improving material utilization efficiency and reducing industrial manufacturing waste.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Metalurgi serbuk, limbah laser cutting, tekanan kompaksi, densitas, porositas, kekerasan. =========================================================== Powder metallurgy, laser cutting waste, compaction pressure, density, porosity, hardness. |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD794.5 Recycling (Waste, etc.) T Technology > TS Manufactures > TS161 Materials management. T Technology > TS Manufactures > TS205 Metals--Heat treatment. T Technology > TS Manufactures > TS320 Steel--Metallurgy. |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Dimas Widya Pratama |
| Date Deposited: | 30 Jul 2026 03:51 |
| Last Modified: | 30 Jul 2026 03:51 |
| URI: | http://repository.its.ac.id/id/eprint/140319 |
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