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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS Journal of Applied Engineering and Technological Science (JAETS) Jurnal Polimesin
Cecep Ruskandi
Politeknik Manufaktur Bandung
Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Pendekatan Hukum Stokes Pada Proses Terjadinya Slag Untuk Meningkatkan Efektifitas Pembersihan Cairan Logam Pada Proses Peleburan Besi Cor Muhammad Rizki Gorbyandi Nadi; Cecep Ruskandi; Ari Siswanto; Eko Koswara
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 2 (2022): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i2.57997

Abstract

Tujuan dari penelitian ini adalah untuk meningkatkan efektifitas pembersihan slag pada proses peleburan besi cor. Penelitian ini menghasilkan perhitungan kecepatan terminal slag muncul ke permukaan tanur induksi berdasarkan pendekatan Hukum Stokes pada masing-masing slag yang muncul saat proses peleburan besi cor. Setiap pengecoran besi cor diambil tiga buah sampel berdasarkan waktu tercepat pada slag yang sangat ringan, waktu terlambat yang dimiliki oleh slag terberat dan waktu ekstrem sebagai pembanding. Hasil dari setiap sampel dilakukan pengujian karakterisasi seperti bentuk, ukuran dan komposisi kimia pada setiap sampel yang kemudian disesuaikan dengan perhitungan yang telah dibuat. Karakterisasi dianalisa dengan menggunakan X-ray diffraction, Scanning micrsocope elektro dan energy dispersive spectroscopy micro analysis. Hasil menunjukkan bahwa pendekatan hukum stokes untuk memprediksi slag mencapai permukaan mendapatkan hasil yang sesuai bahwa seluruh slag mencapai permukaan pada waktu t = 230 s. Slag yang muncul pada waktu t = 300 s merupakan slag yang terbentuk akibat interaksi cairan dengan permukaan yang bukan merupakan slag yang terjadi dari raw material yang digunakan. Penelitian ini berhasil untuk meminimalisir terbentuknya slag pada setiap pengecoran besi cor menggunakan tanur induksi.
Hardening of bucket teeth made from creusabro 8000 steel by using the induction hardening method Darma Firmansyah Undayat; Cecep Ruskandi; Ari Siswanto
Jurnal POLIMESIN Vol 21, No 3 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i3.3672

Abstract

Excavators are often used in mining projects such as for penetrating, excavating, dredging, gouging, and crushing mineral rocks. Bucket teeth are an excavator component that is often being replaced due to failure. The most common failure mode that occurred in bucket teeth was wear on the tip or front section of it. To reduce the wear of the bucket teeth material then its hardness should be increased. As the hardness value increases, the resistance to wear increases. The bucket teeth were made of Creusabro 8000 steel and a hardening process was then carried out on the front section of the bucket teeth components by using an induction furnace. The power used in the induction furnace varies from 28, 35, 42 and 49 kW (kilowatts) and the holding time varies between 3 and 5 minutes. The heat treatment process used oil as a cooling medium. The analysis was carried out to determine the area that experienced an increase in hardness and its occurred microstructure. Microstructure examination was carried out with an optical microscope, and hardness test by using a Vickers microscopy. It can be concluded from the result of the analysis that the large area experienced an hardness increase is directly proportional to the electric current magnitude and holding time. The microstructure has changed from fine pearlite to martensite thus hardness of Bucket Teeth can be increased up to 100% of the initial hardness.
Optimizing Low-Pressure Die Casting of A356 Aluminum Alloy Wheel Rims: A Novel Side Core With Integrated Cooling System Roni Kusnowo; Hanif Azis Budiarto; Cecep Ruskandi; Sophiadi Gunara; Ery Hidayat; Muhammad Nahrowi; Emma Dwi Ariyani
Journal of Applied Engineering and Technological Science (JAETS) Vol. 6 No. 1 (2024): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v6i1.5122

Abstract

This study explores the development of a novel side core design with an integrated cooling system for the low-pressure die casting (LPDC) of A356 aluminum alloy wheel rims in Indonesia. The objective is to reduce cycle time and minimize casting defects. The methodology involves 3D modeling using SolidWorks and simulations performed with MAGMAsoft to evaluate filling and solidification behavior, air pressure, and air entrapment. Notably, this is the first application of a cooling system in Side cores within the Indonesian automotive industry, motivated by the need to improve production efficiency and product quality, as current manufacturing processes suffer from long cycle times and high defect rates. Simulation results show a significant reduction in cycle time by 72 seconds, improving both efficiency and product quality. This study demonstrates the effectiveness of integrating cooling systems into side cores to enhance the LPDC process.
Co-Authors Ari Siswanto Darma Firmansyah Undayat Eko Koswara Emma Dwi Ariyani, Emma Dwi Hanif Azis Budiarto Hidayat, Ery Muhammad Nahrowi Nadi, Muhammad Rizki Gorbyandi Nadi Roni Kusnowo Sophiadi Gunara