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All Journal Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Ekonomikawan : Jurnal Ilmu Ekonomi dan Studi Pembangunan Indonesian Journal of Forestry Research Jurnal Penelitian Hasil Hutan Perspektif : Review Penelitian Tanaman Industri Widyariset BERITA BIOLOGI Biodidaktika : Jurnal Biologi dan Pembelajarannya Jurnal Pengembangan Riset dan Observasi Teknik Informatika Jurnal Teknologi Bahan dan Barang Teknik Jurnal Penelitian Hasil Hutan Perspektif, Review Penelitian Tanaman Industri Widyariset Jurnal An-Nufus Informatics and Computer Engineering Journal PROSISKO : Jurnal Pengembangan Riset dan observasi Rekayasa Sistem Komputer Jurnal Ilmiah Sains Metalurgi Jurnal Manuhara: Pusat Penelitian Ilmu Manajemen Dan Bisnis
Saefudin Saefudin
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Neuroscience Physics Social Sciences Other

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PENGARUH TEMPERATUR DAN pH AIR SADAH KALSIUM SULFAT TERHADAP KOROSI PADA BAJA KARBON Sundjono Sundjono; Saefudin Saefudin
Metalurgi Vol 29, No 1 (2014): Metalurgi Vol.29 No.1 April 2014
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (416.839 KB) | DOI: 10.14203/metalurgi.v29i1.270

Abstract

Studi Variasi Suhu Tahan pada Saat Proses Laku Panas Baja Paduan Berfasa Ganda Ni-Laterit Satrio Herbirowo; Saefudin Saefudin; Bintang Adjiantoro
Jurnal Teknologi Bahan dan Barang Teknik Vol 8, No 1 (2018)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1891.197 KB) | DOI: 10.37209/jtbbt.v8i1.116

Abstract

This research was aimed to study the effect of variations in the holding temperature on Ni-laterite steel at 800°C and the holding time of one hour with cooling treatment variation on water quench media. After holding temperature of 800°C, three specimens were reheated at 300, 500, and 700°C simultaneously. After the first heating at 800°C, the specimen had a hardness of 60.98 HRC, and composed of 82.04% martensite phase fraction and 18.51% ferrite phase fraction. After the second heating at 300°C, the specimen had a hardness of 21.36 HRC, and composed of 66.11% pearlite and 33.89% fine-grain ferrite. Large grain pearlite changed to dendritic due to solidification and phase transformation. Morphological characterization using Scanning Electron Microscopy and Energy Dispersive X-Ray resulted in clear grain boundary as well as martensite phase shape. Ni/Fe alloyed element dispersed in all sample sections.Penelitian ini ditujukan untuk mempelajari pengaruh variasi suhu tahan pada baja Ni-laterit yang dipanaskan pada temperatur 800oC dengan waktu tahan 1 jam dan media pendinginan berupa air. Setelah pemanasan dan pendinginan tersebut, spesimen kembali dipanaskan dengan temperatur penahanan bervariasi 300, 500, 700oC secara simultan. Pada spesimen dengan pemanasan pertama, didapatkan nilai kekerasan 60,98 HRC dan fasa yang terbentuk adalah 82,04% martensit dan 18,51% ferit. Pada pemanasan 300oC didapatkan nilai kekerasan 21,36 HRC dan fasa yang terbentuk adalah 66,11% perlit dan 33,89% ferit halus. Perlit kasar membentuk struktur dendritik, didapatkan karena solidifikasi dan transformasi fasa. Karakterisasi morfologi menggunakan SEM dan EDS menunjukkan struktur batas butir yang jelas beserta bentuk fasa martensit dan elemen paduan Ni/Fe tersebar merata pada sampel.
Meningkatkan Manajemen Persediaan Suku Cadang (Sparepart) Motor pada Bengkel Tiga Putra di Bojonegara Banten Ferdy Apriyansah; Ifan Ramadhan; Nurul Fawaz; Saefudin Saefudin
Jurnal Manuhara : Pusat Penelitian Ilmu Manajemen dan Bisnis Vol. 3 No. 1 (2025): Jurnal Manuhara : Pusat Penelitian Ilmu Manajemen dan Bisnis
Publisher : Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/manuhara.v3i1.1569

Abstract

Tiga Putra's workshop, which is located in Bojonegara Banten, still has meetings with the large number of requests for vehicle repairs from customers, making the workshop have to provide various kinds of spare parts. The purpose of making this journal is to find out the existing conditions in the three sons' workshop and we provide solutions on how to increase the supply of spare parts. The aim of increasing the inventory of motorbike spare parts is to ensure the availability of components needed for vehicle maintenance and repair, so as to increase operational efficiency and customer satisfaction. The methodology used is a qualitative case study, with data collection through in-depth interviews, documentation studies and field observations. The results of the research are that there are obstacles in increasing the supply of motorbike spare parts, namely limited resources, be it money, time or labor. And Tiga Putra's workshop also has a strategy to increase spare parts inventory which can help with real-time inventory and plan reorders more efficiently. And there is also a spare parts inventory table so you can find out which spare parts orders are sold out within one year and require delivery.
Co-Authors Adianto Adianto Akip Suhendar Alfirano Alfirano Ana Ratna Wulan Anharudin Anharudin Arif Dwi Saputra Bintang Adjiantoro Budiarjo Budiarjo Diki Susandi Donny Fernando Efendi Mabruri Efrida Basri Efrida Basri Erma Perwitasari Ferdy Apriyansah Fredinan Yulianda Galih Senopati Harsiti Harsiti Ifan Ramadhan Iksal Iksal Ilham Aswad Kevin kevin Khaerul Wahidin Miranti Ariyani moch syaiful anwar Muhammad Azka Maulana Nurul Fawaz Nurwati Hadjib Ragil Wijianto Saleh Dwiyatno Satrio Herbirowo Soesy Asiah Soesilawaty SRI LESTARI Sri Rulliaty Suci Wulandari Suherman Suherman Sumanto Sumanto Sunaryo Sunaryo Sundjono Sundjono Surya Darma Batu Bara Tina Safaria Nilawati Vidila Rosalina