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All Journal Metalurgi
Akhmad Herman Yuwono
Department of Metallurgy and Materials Engineering, Faculty of Engineering, University of Indonesia, Depok 16424
Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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STUDI PERBANDINGAN EFEK FOTOKATALISIS Fe2O3-TiO2 HASIL EKSTRAKSI ILMENIT BANGKA DAN P-25 DEGUSSA UNTUK APLIKASI PENGOLAHAN LIMBAH CAIR TPA CILOWONG[The Photocatalytic Effect of P-25 Degussa and Fe2O3-TiO2 Derived from Bangka- Indonesia Ilmenite Extraction for Waste Water Treatment of Leachate on the Landfill Cilowong] Latifa Hanum Lalasari; Akhmad Herman Yuwono; Firdiyono Firdiyono; Lia Andriyah; Elfi N; Sri Harjanto; Bambang Suharno
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (643.211 KB) | DOI: 10.14203/metalurgi.v27i3.235

Abstract

Effect of Heating Temperature and Die Insert Draft Angle on the Flowability of Hot Forged SCM435 Steel Nofrijon Sofyan; Maulana Heruwiyono; Akhmad Herman Yuwono; Donanta Dhaneswara
Metalurgi Vol 37, No 2 (2022): Metalurgi Vol. 37 No. 2 Agustus 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (806.556 KB) | DOI: 10.14203/metalurgi.v37i2.635

Abstract

The problem of flowability in a closed forging process for heavy equipment industry is still widely found and this may affect the quality of the resulting product. To obtain the solution for this problem, in this work, the effect of heating temperature and die insert draft angle on the characteristic of hot forged SCM435 steel used for undercarriage track roller has been examined. The workpieces were heated at temperature variations of 1150 °C, 1200 °C, 1250 °C and were hot forged at die insert draft angles of 3°, 5°, and 7° to form undercarriage track roller products. The mechanical properties of the products were characterized through hardness and dimension examination, whereas the microstructure was characterized using an optical microscope. The results showed that increasing the heating temperature and die insert draft angle resulted in good flowability. The best result was obtained from the heating temperature of 1250 °C at the die insert draft angle of 7°, with diameter and height of 191.2 mm and 53.6 mm, respectively. This characteristic of the obtained hot-forged product agreed with that of the specified forging design for the undercarriage track roller
Co-Authors Bambang Suharno Donanta Dhaneswara Elfi N Firdiyono Firdiyono Latifa Hanum Lalasari Lia Andriyah Maulana Heruwiyono Nofrijon Sofyan Sri Harjanto