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Sutrisno Sutrisno

Jurusan Teknik Mesin Politeknik Negeri Pontianak

Author-ID : 5341059

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Mathematics

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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

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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

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.

Analisis Pengaruh Panas pada Baja Kontruksi dengan Pendinginan Air Sungai dan Air Laut terhadap Kekuatan Mekanik Sutrisno Sutrisno; Azmal Azmal; Joni Rahmadi
Vokasi: Jurnal Publikasi Ilmiah Vol 17 No 1 (2022): Vokasi
Publisher : Politeknik Negeri Pontianak

Abstract: Housing, buildings and factories often fire, this can be caused by electric short circuits, explosions of gas stoves. Extinguishing fires can use river water or sea water. This research is expected to get an overview of data about tensile strength, hardness and mechanical properties due to changes in heat temperature and cooling with river water and sea water on steel construction materials with various operational conditions. The materials used are plain reinforcing steel (BJTP), deformed steel and profiled steel (IWF-400) heated in the heating kitchen with variations of 600 , 700 , 800 and 900 , cooled by river and sea water, carried out Vickers tensile strength and hardness test. The results of the tensile test of BJTP increased by 461.55 N/mm2, the highest cooling of river water was 9000C=345.15N/mm2(53.70%), the lowest was 600 =31.13 N/mm2 (4.84 %). The highest deformation was 900℃=345.15 N⁄mm2 (53.70 %), the lowest was 600 =31.13N/mm2 (4.84 %). The highest IWF-400 was 900 =101.32 N/mm2 (18.93 %), the lowest was 600 =10.85 N/mm2(2.03%). Vickers BJTP hardness test is the highest for cooling river water 900 =35.06 HV (41.32%), the lowest is 600 =2.16 HV (2.55%). Deform 900 = 47.28 HV (53.63%), the lowest 600 =3.88 HV (4.40%). IWF-400 900 =15.52 HV (18.89 %), the lowest 600 =1.66 HV (2.02%). As the temperature increases by cooling seawater and river water, the tensile strength and hardness of the vickers also increase

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