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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 Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Representamen Kieraha Medical Journal Vokasi
Dwi Handoko
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Nursing Public Health Social Sciences Transportation

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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%.
Co-Authors Agato Agato Alfeus Sunarso amina amina Amina, Amina Aripin Manurung Azmal Azmal Azmal Azmal Azmal, Azmal Dana Indra Sensuse darmayanti, dewi dewi darmayanti Dominikus Sulistiono Eko Widagdo Eligius Ilhamdi Fauzia Nur, Pita Larasati Luh Putu Ratna Sundari Masril Masril Muhamad Brilliant Sony Sunaryo Sri Yuniati Sriyanto - Sutrisno Sutrisno Sutrisno, Sutrisno Trihartono, Agus Uray Vicky Ramadhan Vivaldi Vivaldi