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All Journal Prosiding Semnastek Manutech : Jurnal Teknologi Manufaktur Sprocket : Journal of Mechanical Engineering Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan
Somawardi Somawardi
Politeknik Manufaktur Babel
Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : Manutech : Jurnal Teknologi Manufaktur

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Analisis Pengaruh Media Pendingin Dengan Kombinasi Waktu Penahanan Pendingin Terhadap Nilai Kekerasan Baja AISI-1045 Pada Proses Quenching ERVAN AGUSTIAN; Somawardi; Sugianto
Manutech : Jurnal Teknologi Manufaktur Vol. 13 No. 01 (2021): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.237 KB) | DOI: 10.33504/manutech.v13i01.169

Abstract

AISI-1045 steel has a hardness of 7,167 HRC without treatment. The hardness of this steel can be increased through the hardening process with rapid cooling. This study aims to determine the optimum hardness value and how the effect of cooling media (brine, water, and oil) with a combination of coolant holding time (5, 10, and 15 minutes) which received quenching heat treatment against the hardness of AISI-1045 carbon steel. The heating process is carried out at a temperature of 900ยบ C using an electric oven. This study used AISI-1045 steel with a diameter of 25 mm and a length of 25 mm. Tests carried out using a Universal Hardness Tester (Rockwell). The hardness is influenced by the type of cooling medium and the holding time of the coolant. Based on the fast cooling carried out from the three media with variations in the cooling holding time, it produces varying levels of hardness. From the heat treatment that has been done, the highest hardness value is in the brine medium with a coolant holding time of 15 minutes (G15) with an average value of 53,283 HRC. And the lowest hardness value is the oil medium with a coolant holding time of 5 minutes (O5) with an average value of 21,583 HRC.
Analisa Pengaruh Ukuran Mesh dan Curring Time Pada Komposit Serbuk Kayu Nyatoh Terhadap Pengujian Tarik Somawardi, Somawardi; Akbar Rafsanjani, Alfarobbi; Yuliyanto, Yuliyanto; Sukanto, Sukanto
Manutech : Jurnal Teknologi Manufaktur Vol. 15 No. 02 (2023): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v15i02.274

Abstract

Various types of trees grow in Indonesia, one of which is the Nyatoh tree. Uses: This nyatoh wood tree is very useful as a material for building houses, making furniture, and so on. In the process of processing nyatoh trees into finished materials, shavings or powder will be produced, but the use of shavings or powder has not been utilized optimally. So the rest of the process makes the surrounding environment dirty and unsightly. This composite material has the advantages of adjustable strength, excellent fatigue strength, corrosion resistance, light weight and very low production costs. The aim of this research is to determine the tensile test value of nyatoh wood powder composites at volume fractions of 5%, 10%, 15% with a mesh size factor of 100, 150, 200 and a curing time of 2 hours with a heating temperature of 60 ?, 80 ?, 100 ?. The research method used is the full factorial method. The composite material is made using the hand-lay-up method. The highest tensile strength value in this research was a 5% sample with a mesh size of 200 and a curing time temperature of 60 ? with a tensile test result of 30.60 Mpa. Meanwhile, the lowest tensile strength result was 10.97 Mpa at a powder fraction of 5% with a mesh size of 100 and a curing time with a temperature of 60 ?. The size of the mesh greatly influences the tensile testing, where the higher the mesh used, the tensile strength increases. Meanwhile the heating process (curring time) also has an influence, but not so big, the higher the temperature of the curing time will cause a decrease in tensile strength.
Co-Authors Abriansyah, Fadhlurrohman Akbar Rafsanjani, Alfarobbi Al Ghifari , M Ghazi Anggi Leonardo Anggraini, Asty Arlingga, Alfian Siswara Bilal Pratama, Muhammad ERVAN AGUSTIAN Erwansyah Erwansyah Hakim, Zikrul Muhammad Hasan Muhammad Subhan Muhammad Subhan Ramadhani Harahap, Dedy Rusdi, Ahamad Sabila Rizky, Putra Pratama Sahril Sahril Sembiring, Rinawati Solly Aryza Somawardi Somawardi Sugianto Sugianto - Sugianto Sugianto Sugiyarto Sugiyarto Sukanto Sukanto Yulianto, Ferisa Yuliyanto Yuliyanto Yuliyanto