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All Journal Manutech : Jurnal Teknologi Manufaktur Integrated Science Education Journal Jurnal Inovasi Teknologi Terapan
Sugiyarto Sugiyarto
Politeknik Manufaktur Negeri Bangka Belitung
Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Proses Metalurgi Serbuk Komposit Matrik Phenolic Resin di Perkuat Serbuk Logam & Arang Tempurung Kelapa Fibry Yansha; Sukanto Sukanto; Sugiyarto Sugiyarto
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 1 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i1.413

Abstract

This study aims to investigate the effect of sintering temperature variations on the hardness and density of brake pad composites fabricated using the powder metallurgy method. The fabrication process consisted of material preparation, powder mixing, cold compaction, and sintering with the weight fraction of matrix and filler wt.% being 40/60, 48/52, and 56/44 wt.%. Powder mixing was carried out using a horizontal ball mill with a ball-to-powder weight ratio (BPR) of 10:1, a rotational speed of 90 rpm, and a milling time of 4 hours. Cold compaction was performed uniaxially at a pressure of 5300 PSI for 10 minutes, followed by sintering at temperatures of 50°C, 60°C, and 70°C for 10 minutes. Density testing was conducted based on Archimedes’ principle in accordance with ASTM B962-17, while hardness was measured using a portable Brinell hardness tester following ASTM E110-14. The highest hardness value of 103.0 HB was obtained at 48% matrix composition with a sintering temperature of 60°C, while the highest density of 1.453 g/cm³ was achieved at 40% matrix composition with a sintering temperature of 70°C. These findings demonstrate that sintering temperature has a significant influence on the mechanical and physical properties of the brake pad composite.
Effect of Heat Treatment and Tempering Process on the Hardness of S55c Steel as A Cutting Blade Material for Plastic Shredding Machines Eko Yudo; Ariyanto Ariyanto; Erwansyah Erwansyah; Zaldy Sirwansyah Suzen; Sugiyarto Sugiyarto; Yuli Dharta; Zulfitriyanto Zulfitriyanto
Integrated Science Education Journal Vol 7 No 1 (2026): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v7.i1.2461

Abstract

Purpose of the study: This study aims to optimize the heat treatment process of S55C medium-carbon steel by examining the combined effects of austenitizing temperature, quenching media, and tempering temperature on impact toughness. Methodology: An experimental approach was employed using quenching and tempering treatments. Quenching was performed at three austenitizing temperatures (950°C, 1000°C, and 1050°C) with three different cooling media—salt water, oil, and seawater—followed by tempering at 100°C, 200°C, 300°C, and 400°C. All heating processes were conducted in an electric furnace. Parameter optimization was carried out using the Taguchi method with an L9 orthogonal array. Mechanical performance was evaluated through Charpy impact testing, and confirmation experiments were conducted to validate the optimal parameter combination. Main Findings: The Taguchi analysis identified the optimal quenching condition at an austenitizing temperature of 1050°C with salt water as the cooling medium, yielding the highest impact toughness. Confirmation tests supported the reliability of this result. Additionally, the tempering process showed that increasing the tempering temperature decreased hardness while significantly improving toughness, indicating effective stress relief and improved ductility in the steel microstructure. Novelty/Originality of this study: The novelty of this study lies in the integrated optimization of quenching temperature and diverse cooling media, including seawater, using the Taguchi method, with a specific focus on toughness rather than hardness alone. This research provides new insights into tailoring heat treatment parameters for S55C steel to achieve superior impact resistance, offering practical guidance for more efficient and application-oriented heat treatment strategies in manufacturing industries.
Pengaruh Penambahan Molase Dan Perendaman Serat Menggunakan Natrium Bikarbonat (NaHCO3) Terhadap Kekuatan Bending Komposit Serat Kulit Batang Waru Sebagai Bahan Pembuatan Dashboard Mobil Sandi Sandi; Muhammad Subhan; Sugiyarto Sugiyarto; Yuliyanyo Yuliyanto
Manutech : Jurnal Teknologi Manufaktur Vol. 18 No. 01 (2026): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v18i01.735

Abstract

Technological developments in industrial fields such as materials have certainly encouraged the search for sustainable composite material alternatives, especially from renewable natural resources. One such effort is the use of natural materials as composite material reinforcements. This study aims to determine the effect of molasses addition and the optimal combination of molasses addition and immersion time using (NaHC03) on bending strength for application in car dashboards. The testing process involved bending tests with molasses additions of 3%, 5%, and 7% and immersion times (NaHC03) of 5, 6, and 7 hours. The bending test specimens referred to the ASTM D-790 standard. The results of this study showed that the highest bending strength value obtained was 66.1 MPa with 5% molasses addition, and the best combination of molasses addition and (NaHC03) immersion time was 5% addition with an immersion time of 5 hours. The results of this study indicate that the addition of molasses and the soaking time of the fibers affect the mechanical strength of the composite. Based on the BSAPI standard for bending tests, the results obtained from this study can be used for car dashboards made of ABS High Impact plastic, which has a strength of 37-76 MPa.
Co-Authors Eko Yudo Erwansyah, Erwansyah Fibry Yansha Muhammad Subhan Sandi Sandi Sukanto Sukanto Suzen, Zaldy Sirwansyah Yuli Dharta Yuliyanyo Yuliyanto Zulfitriyanto Zulfitriyanto