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All Journal SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal Teknik Industri : Jurnal Hasil Penelitian dan Karya Ilmiah dalam Bidang Teknik Industri
Hendryanto, Refdinal Latif
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Other

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Optimization of Hardness Improvement of Bucket Wheel Excavator (BWE) Trackplate Bushing Material Based on the Taguchi Method Hendryanto, Refdinal Latif; Hendryanto, Refaldy Yusuf; Arifin, Amir
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 22, No 1 (2024): December 2024
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v22i1.33221

Abstract

trackplate’s bushing material made of AISI 4340 steel through heat treatment designed using the Taguchi method. The heat treatment process includes several key parameters, namely austenitizing temperature, austenitizing time, quenching media, and tempering time, which are systematically evaluated to maximize the increase in material hardness. The experimental design employs the Taguchi method with an L9 orthogonal array to determine the optimal combination of parameters from four factors and three levels of variables, including austenitizing temperatures of 870°C, 900°C, and 925°C; austenitizing times of 25, 30, and 35 minutes; quenching media of water, salt water, and oil; and tempering times of 1.5, 2, and 2.5 hours. Hardness testing conducted using the Rockwell HRC scale shows that the optimal combination is achieved at an austenitizing temperature of 925°C, an austenitizing time of 35 minutes, salt water as the quenching media, and a tempering time of 2.5 hours. This combination successfully increases the material hardness to 56.9 HRC, representing an increase of 67.84% from the initial hardness of 33.9 HRC. S/N ratio analysis reveals that quenching media and austenitizing temperature significantly impact the increase in hardness. At the same time, tempering time plays a role in stabilizing the martensitic structure without reducing the achieved hardness. The results of this study demonstrate that the Taguchi method effectively determines the optimal heat treatment parameters for bushing materials, thus producing material hardness that meets the required technical specifications.Keywords: AISI 4340 Steel, bushing, hardness improvement, heat treatment, Taguchi method, S/N ratio analysis.
Penerapan Metoda RCM Dan Analisis FMECA Untuk Menentukan Interval Preventif Maintenance Dan Estimasi Biaya Perawatan Mesin Potong Plat YSD HGS 31/30 Hendryanto, Refdinal Latif; Hendryanto, Refaldy Yusuf; Basri, Hasan
JTI: Jurnal Teknik Industri Vol 9, No 2 (2023): DESEMBER 2023
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jti.v9i2.22987

Abstract

Satuan kerja Rekayasa Enjiniring dan Manufaktur PT. Bukit Asam Tbk bertanggung jawab atas keandalan fasilitas angkutan batubara dan peralatan. Peralatan seperti mesin potong plat YSD HGS 31/30, yang merupakan bagian penting dari proses fabrikasi, sering mengalami kerusakan pada bagian-bagiannya. Akibatnya, satuan kerja tidak dapat mencapai KPI (Key Performance Indicator). Tujuan penelitian ini adalah untuk menentukan nilai kritis dari komponen mesin potong plat dan rekomendasi perawatan terbaik. Analisis FMECA juga digunakan untuk menghitung biaya perawatan mesin, dan metode RCM digunakan untuk menentukan interval dan tugas perawatan. Hasil penelitian menunjukkan bahwa tugas perawatan pencegahan yang direkomendasikan untuk komponen motor induksi mencakup tugas perawatan on-condition dan restorasi yang direncanakan setiap dua belas bulan, sedangkan tugas perawatan on-condition dan restorasi yang direncanakan untuk gearbox diperlukan setiap empat bulan, dan tugas perawatan restorasi dan pembersihan hidrolik diperlukan setiap empat bulan. Hasil perhitungan biaya menunjukkan bahwa biaya perawatan mesin potong plat YSD HGS 31/30 adalah Rp. 105.683.700 per tahun. Kata kunci: Metode RCM, analisis FMECA, mesin potong plat, tugas perawatan pencegahan, biaya perawatan
Co-Authors Amir Arifin Hasan Basri Hendryanto, Refaldy Yusuf