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All Journal Jurnal Teknik Mesin Majalah Ilmiah MOMENTUM JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN INOVTEK POLBENG Jurnal Ilmiah Teknik Mesin "MEKANIK" Jurnal Mekanik Terapan JTMO ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Teknik Terapan (J-TETA) Inovtek Seri Mesin Jurnal Polimesin TANJAK : Jurnal Pengabdian Kepada Masyarakat INOVTEK Polbeng - Seri Informatika
Reinaldi Teguh Setyawan
Politeknik Negeri Bengkalis
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Analisis Hubungan Kadar Karbon dan Energi Charpy pada Baja ST37 setelah Karburisasi Padat dengan Arang Tempurung Kelapa dan Bakau murdani murdani; Burhan Khafid; Reinaldi Teguh Setyawan
Jurnal Teknik Terapan Vol. 5 No. 2 (2026): Oktober
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jteta.v5i2.139

Abstract

Low-carbon ST37 steel is widely used due to its good manufacturability, while surface performance is often improved through pack carburizing. This study investigates the trade-off between carbon uptake and impact toughness of ST37 steel after pack carburizing using coconut-shell charcoal and mangrove-wood charcoal (with an untreated control and a 50:50 blend as comparators). The process was conducted at 750 °C with a 180 min heating period and a 60 min holding time, followed by water quenching (≈28 °C). The main outputs were carbon content from chemical composition testing and Charpy absorbed energy (three replicates per condition). The results indicate that carbon content increased from 0.12% (control) to 0.63% with coconut-shell charcoal, 0.22% with mangrove charcoal, and 0.30% with the 50:50 blend. However, the mean Charpy energy dropped sharply for coconut-shell charcoal to 2.24 J compared with 35.92 J for the control, whereas mangrove charcoal and the 50:50 blend maintained high Charpy energy at 35.12 J. Fracture surface observations were consistent with these trends, showing brittle fracture for coconut-shell charcoal and ductile fracture for the control, mangrove charcoal, and the blend. These findings confirm a clear trade-off: the highest carbon uptake does not necessarily ensure adequate impact toughness. Therefore, media selection should be based on a dual-metric consideration of carbon increase and Charpy toughness, depending on the intended application requirements.
Co-Authors abdul khohar Agnes Arum Budiana, Agnes Arum Ahmad, Zaid Alfazan Yendra Yendra Burhan Hafid Burhan Khafid Ery Muthoriq, Ery Fajrul, Rahmad Fajrul, Rahmat Fatkhur Riski Gunawan Gunawan Gunawan Gunawan Gunawan Gunawan Ibnu Hajar Ibnu Hajar Imran Imran Irwan Kurniawan Irwan Kurniawan Irwan Kurniawan Irwan Kurniawan Kafaj, M. Al Muhammad Asep Subandri murdani murdani Razali Siti Umira Siti Umira Slamet Riyadi Sunarto SUNARTO Sunarto Narto Umira, Siti