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All Journal E-SOSPOL Proceeding International Conference on Information Technology and Business Jurnal Konstruksia International conference on Information Technology and Business (ICITB) Turbo : Jurnal Program Studi Teknik Mesin Jusikom : Jurnal Sistem Komputer Musirawas Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Representamen Jurnal Ilmu Kedokteran dan Kesehatan TEKNOKOM : Jurnal Teknologi dan Rekayasa Sistem Komputer Manajemen Agribisnis: Jurnal Agribisnis AVERROUS: Jurnal Kedokteran dan Kesehatan Malikussaleh Jurnal Kesehatan Tambusai Jurnal Mesin Nusantara HOAQ (High Education of Organization Archive Quality) : Jurnal Teknologi Informasi Jurnal Pengabdian kepada Masyarakat Kieraha Medical Journal Jurnal Akuntansi dan Keuangan East Java Economic Journal Journal of Language, Literature, and Arts (JoLLA) Vokasi Cerdika: Jurnal Ilmiah Indonesia Asia Information System Journal Jurnal Ilmiah Informatika dan Ilmu Komputer CHAIN: Journal of Computer Technology, Computer Engineering and Informatics Journal of Information Technology, Software Engineering and Computer Science Ecoducation Journal of Software Engineering And Technology Journal of Vocational and Career Education Berbakti
Dwi Handoko
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Journal : Vokasi

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Analisa Parameter Arus Pemakanan terhadap Material Removal Rate dan Electrode Relative Wear Bahan Elektrode Cu, Brass Dn Grafit pada Mesin Edm Chimer Ez Dwi Handoko; Sutrisno Sutrisno; Azmal Azmal
Vokasi Vol 12 No 1 (2017): Vokasi
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (102.716 KB)

Abstract

Pada penelitian ini dilakukan analisa pengaruh parameter variasi arus terhadap keausan material elektrode/Electrode Relative Wear serta hubungannya terhadap laju pembuangan material / Material Removal Rate dari mesin EDM Chimer Ez. Arus yang digunakan 1,5; 3; 6; 8; 10 dan 12 amper. Sedangkan material elektrode menggunakan tembaga, kuningan, aluminium dan grafit serta benda kerja baja ST 60. Dari hasil yang di dapat secara umum, semakin tinggi arus yang digunakan angka keausan material elektrode semakin meningkat. Dari ketiga jenis logam kuningan, tembaga dan aluminium, logam kuningan memiliki angka laju keausan tertinggi dan yang terendah terjadi pada elektrode grafit. Kata Kunci: EDM, MRR, ERW, Elektrode
Pengaruh Variasi Jenis Katalisator Dan Holding Time Pada Proses Pack Carburizing Terhadap Perubahan Komposisi Karbon Dan Nilai Kekerasan Baja Karbon Rendah (Low Carbon Steel) St 37 Dwi Handoko; Vivaldi Vivaldi; Sutrisno Sutrisno
Vokasi Vol 16 No 1 (2021): Vokasi
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.625 KB) | DOI: 10.31573/vokasi.v16i1.316

Abstract

In this study, a pack carburizing process was carried out on low carbon steel using activated carbon, coconut shell charcoal and various catalysts in the form of ale-ale shells, eggshells, and beef bones. The method used is heating at an austenite temperature of 900 oC with a variation of holding time of 30, 60, and 90 minutes, then quenching using water, followed by hardness testing with the Vickers method and composition testing. The general result is that the three types of catalysts can accelerate the diffusion-reaction so that the carbon addition process occurs and the longer holding time can provide an opportunity for the carbon formed to transform from the pearlite microstructure to the austenite microstructure, and when quenching it forms the Martensite microstructure. Of the three types of catalysts that produced the highest hardness was an ale-ale shell, from the initial hardness 119 HV to 464 HV.
Pengaruh Variasi Temperatur Austenit Pengujian Jominy Test Pada Sifat Hardenability Baja ST 90 Azmal Azmal; Dwi Handoko; Masril Masril; Eligius Ilhamdi
Vokasi Vol 16 No 2 (2021): Vokasi
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (794.746 KB) | DOI: 10.31573/vokasi.v16i2.403

Abstract

The purpose of this research is to obtain information about the hardness value (hardening) and changes in microstructure as well as changes in the properties of the material at a temperature variation of 600℃ to 900℃. The method used in this study is an experimental method, where the material used is ST.90 steel, and Jominy testing. 5 samples were made at each temperature 22℃, 600℃, 700℃, 800℃, and 900℃ with the type of heat treatment in the hardening process. The test results for Vickers hardness decreased by an average of 33.99 HV or 31% and the carbon content decreased by an average of 0.19. or 48% of the normalizing process is not done. Based on the data above, it shows that the results of the Vickers hardness test and chemical composition with the hardening process of ST.90 steel, which are heated at 600℃, 700℃, 800℃, and 900℃ respectively, each temperature is reached and stopped with 60 minutes. In order for phase transformation to occur in all parts of the material, then the cooling process is carried out using the Jominy test, showing the mechanical strength, namely the Vickers hardness test decreases by 23% and the carbon content decreases at 37%.
Pengaruh Penambahan Serat Asbes Terhadap Sifat Refractory Brick Berbahan Kaolin dan Fly Ash Handoko, Dwi; Azmal, Azmal; Iyus, Iyus
Vokasi: Jurnal Publikasi Ilmiah Vol. 19 No. 1 (2024): Vokasi: Jurnal Publikasi Ilmiah
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/jv.v19i1.780

Abstract

Abstract: This study aims to determine the effect of adding asbestos to the production of refractory bricks with different material compositions, namely kaolin, fly ash, asbestos and standard water. The composition of kaolin and fly ash is given in equal percentages, varying according to the mass of asbestos, 0 (%), 10 (%), 15 (%), 20 (%), 30 (%). The tests carried out are thermal conductivity and mechanical properties, where these results become parameters for determining the best composition. The results of testing the compressive strength of refractory bricks showed that 0 (%) quartz sand composition had the largest compressive strength, namely 14.40 (Mpa), the impact test results for 0 (%) asbestos fiber composition had the largest value, namely 0.084 (Joule/mm2), while the results Heat conductivity testing showed that quartz composition 30 (%) had the lowest value, namely 0.373 K(W/mC), thus the addition of asbestos fiber can reduce heat conductivity but cause a decrease in the compressive and impact mechanical properties of refractory bricks. Keywords: Refractory bricks, refractories, kaolin, fly ash, asbestos
Co-Authors . Agato Abubakar, Ummuhani Adityasna, Hardi Adriani, Weni Yunisa Afrianto, Firman Ahmad Faizal Ahmad Syarifuddin Akhmad Jayadi Al Qusri, Muhammad Fariq amina amina Amina, Amina Ananda, Rizika Ardian Asyhari Arifin, Oki Arpan, Atika ASTUTI, TIARA WIDYA Atha Talitha Nabil Azmal Azmal Azmal Azmal Azmal, Azmal Bernadus Rico Brilliant, Muhamad Dana Indra Sensuse darmayanti, dewi dewi darmayanti Dimas Angga Negoro Dominikus Sulistriono Eko Widagdo Eligius Ilhamdi Elya Dianis Fadhullah, Arghan Fakhry Faino, Faino Fatin Aliah Phang Fauzia Nur, Pita Larasati Fitra, Jaka Fitriyah Fitriyah Govin Gautama Gregorius Lado Hariyanto, Annisa Dira Hartono, Susilo Hendri Purnomo Henry Kurniawan Istiqomah, Retno Iswanda, Dovian Iyus, Iyus Jain, Nurmala Kasdi Tri Aryada Luh Putu Ratna Sundari Manurung, Aripin Masrika, Nur Upik En Masril Masril Masy’ari, Masy’ari meilantika, Dian Muhamad Brilliant Nanda, Adi Prasetia Naufal, Alban Nur Qudus Nur Upik En Masrika Nurhasanah, Iis Ariska Nurul Aliya Oktaria, Herlini Panji Andhika Pratomo Permata, Rizka Prasetia Nanda, Adi Pujarianto, Pujarianto Ramadhan, Uray Vicky Refha Ardinata M.Noer Ristanto, Firgiawan Rodiyana, Rodiyana Rosyana Fitria Purnomo RR. Ella Evrita Hestiandari S Arahman, Rohid Sashikirana, Najla Resmala Sony Sunaryo Sri Yuniati Sriyanto - Sulistiono, Dominikus Sunarso, Alfeus Sutrisno Sutrisno Sutrisno, Sutrisno Syarifudin, Ahmad Sylvia, Sylvia Tantri Yanuar Rahmat Syah Thoha Muhajir Albaar, Thoha Muhajir Trihartono, Agus Unggul Kustiawan Vivaldi Vivaldi Yeri Sutopo yono, pri