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All Journal Buletin Udayana Mengabdi Rotasi Rekayasa Mesin Dinamika : Jurnal Teknik Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Jurnal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Jurnal Mesin Nusantara Jurnal Inovasi Teknologi Terapan
Jahirwan Ut Jasron
Universitas Nusa Cendana
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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KARAKTERISASI BAJA KARBON ST 37 AKIBAT PACK CARBURIZING ARANG CANGKANG KEMIRI DENGAN KATALISATOR SERBUK KERANG ALE-ALE PANTAI OESAPA KOTA KUPANG Marianus Wiskarjo; Wenseslaus Bunganaen; Jahirwan Ut Jasron
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 01 (2025): April 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i01.21001

Abstract

This study aims to determine the changes in microstructure and the increase in hardness of low-carbon steel (ST 37) through the pack carburizing process. The method used involves utilizing charcoal derived from candlenut shells as a carbon source and ale-ale shell powder as a catalyst. The experiment was conducted using 10 steel specimens, where 9 specimens underwent pack carburizing treatment with variations in catalyst composition (10%, 20%, and 30% CaCO₃) at a temperature of 900°C with a holding time of 2 hours, followed by a quenching process using 40% saltwater. The results of the study indicate that the pack carburizing treatment successfully increased the surface hardness of the steel significantly and caused a microstructural transformation from ferrite-pearlite in the initial material to martensitic structure on the carburized surface. These findings suggest the potential use of natural materials as an environmentally friendly alternative for carbon media and catalysts to enhance the mechanical properties of low-carbon steel.
HEAT TREATMENT PADA MATA PISAU ALAT PENGHANCUR ARANG BIOMASA UNTUK MENINGKATKAN NILAI KEKERASAAN DENGAN VARIASI TEMPERATUR Agustinus Otu; Jack C.A. Pah; Jahirwan Ut Jasron
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.23211

Abstract

. This is evidenced by the large use of steel in various machine components, work materials and building construction, both in the form of plates, sheets, pipes and so on. Damage that often occurs in the application of ST 41 steel is wear. Wear occurs due to the influence of external forces in the form of friction and is the most dominant factor in damage to the function of machinery. As a result, the service life and performance of various machine components are reduced and indirectly will increase maintenance costs. The public demand for this metal hardening technology is increasing, so researchers have tried to apply knowledge about metal hardening to knives with low carbon steel materials. Heat treatment aims to increase ductility.. This study shows that Heat Treatment with different temperatures and different cooling media can significantly affect the hardness of low carbon steel. The results of the study showed that the highest hardness of low carbon steel was obtained at a temperature of 950°C with oil cooling media, which was 44.30 HRC.
Co-Authors A. Sanusi A. Silla, Wilson Mardianto Adi Yermia Tobe Aditya Putra Nara Agustinus Otu Aloysius Malik Koten Arifin Sanusi B.N Riw, Defmit Ben V Tarigan Ben V. Tarigan Daud P. Mangesa Daud Pulo Mangesa Defmit B.N. Riwu Demit B. N. Riwu Dominggus Godlief Heryson Adoe Erich Maliwemu, Erich Farus, Febrianus Fredrikus M. Bere Gurnawati, Gurnawati Gusnawati Gusnawati Gusnawati, Gusnawati Harun N. Beliu Hironimus R. Fao Jack C. A. Pah Jack C. A. Pah Jack C.A. Pah Jefri Semuel Bale Kana, Dwiyati Putri Kasi, Paulinus Sargius Kristomus Boimau Laurensius Nogur Laurensius Nogur Lebo, Yohanes M. V. Magesa, Daud Pulo Mangesa, Daud P. Mangesa, Daud Pulo Marianus Wiskarjo mario ardy bili Matheus M. Dwinanto Mengga, Arisontae M. Muhamad Jafri Murizal Matasina Nafie, Andri Nahak, Jufrianus Aven Nurhayati Nurhayati Nurhayati Nurhayati Pah, Jack C. A. Pah, Jack C.A. Pell, Yeremias M. Putra Mone, Devrith Adi Reinner Ishaq Lerrick Retebana, Imanuel Rima Nindia Selan Rohi, Jemssy Ronald Salombe, Mexin Sanusi, Arifin Sa’u, Putra Adhitya Frensly Sore, Agustinus Seven Tamonob, Kristoforus Tarigan, Ben V. Tobe, Adi Yermia Tonda, Naptalia Turupadang, Welem Linggi Valens Tae, Valens Verdy A Koehuan Verdy A. Koehuan Verdy Koehuan W. Bunganaen Wenseslaus Bunganaen Weo, Napsiyana Asti Yasoni Eliaser Seran Yerdi B. Nitbani Yeremias M. Pell