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Herry Oktadinata
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Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH TEMPERATUR PADA PEMBENTUKAN BAJA KARBON RENDAH ASTM A36 UNTUK APLIKASI HANGER ROD Herry Oktadinata
Jurnal Ilmiah Teknik Mesin Vol 4 No 2 (2016): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/jitm.v4i2.720

Abstract

In this study tested the tenacity ASTM A36 carbon steel at high temperatures forming in the hanger rod as raw material, in order to obtain the relationship between the temperature of the formability. Research methods include chemical analysis and tensile testing room temperature and high temperature. Then do the formation ofhanger rod of carbon steel ASTM A36 diameter of 16, 20, 24 mm at a temperature of 600, 700, and 800 0C. Then test the hardness and microstructure observation. Tensile test results showed that the tensile strength and yield drops as temperature increases. Microstructure observation indicates the grain size at a temperature of 600 and 700 0C relatively the same, but at a temperature of 800 0C is much greater. Microstructure observation also shows that there are inclusions. Optimal results show that the formation of 600 and 700 0C better than at a temperature of 800 0C. While ductility at 700 0C is better than 600 0C. So the formation of rod hanger at 700 0C is recommended.
PENGARUH WELDING REPAIR TERHADAP SIFAT MEKANIK PADA PENGELASAN GTAW BAJA DUPLEX UNS S32760 Muhamad Nur Juanda; Herry Oktadinata; Taufiqullah -
Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2019): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/jitm.v7i2.1919

Abstract

Technological developments in the increasingly advanced industrial sector cannot be separated from the welding method, one of which is welding repair. Welding improvements can affect the mechanical properties and microstructure of the material used. This research was conducted to determine the effect of welding repair on UNS S32760 stainless steel duplex material using ER 2594 welding wire which was applied to a vacuum vessel tank. The process of welding original welding in sample 1 using a welding wire with a diameter of 2.4 mm receiving the largest heat input 1.394 kJ / mm. The welding repair process carried out on sample 2 using 2.4 mm diameter welding wire received the largest heat input 1.111 kJ / mm and in sample 3 also experienced welding repair using a welding wire of 2.00 mm receiving the largest heat input 1.347 kJ / mm. The impact test results showed a decrease in the toughness value in sample 2 and sample 3 which underwent welding repair. While the results of Vickers hardness testing increased in sample 2 and sample 3 which underwent a repair welding process, was directly proportional to the increase in heat input received in each sample. The microstructure in samples 2 and 3 changed the phase of Ferrite to Acicular Ferrite. In the HAZ and WL regions in sample 3 Ferrite Grain Boundary is also formed, where Grain Boundary-Ferrite is formed first in the transformation of Austenite to Ferrite, which usually forms along the Austenite boundary. In this research, welding repair process that has mechanical properties close to the mechanical properties of Base Metal is sample 2 which uses 2.4 mm diameter welding wire for welding repair.
Co-Authors Muhamad Nur Juanda Taufiqullah -