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-, Taufiqullah
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PENGARUH WELDING REPAIR TERHADAP SIFAT MEKANIK PADA PENGELASAN GTAW BAJA DUPLEX UNS S32760 Juanda, Muhamad Nur; Oktadinata, Herry; -, 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 | Full PDF (3662.035 KB) | 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.
PENGARUH VARIASI POSISI PENGELASAN TERHADAP DISTORSI DAN SIFAT MEKANIK HASIL PENGELASAN BAJA SS400 MENGGUNAKAN METODE GMAW Hamdi, Iqbal; -, Taufiqullah; Oktadinata, Herry
Jurnal Ilmiah Teknik Mesin Vol 8 No 1 (2020): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2436.305 KB) | DOI: 10.33558/jitm.v8i1.1998

Abstract

Pengelasan merupakan metode penyambungan dua material atau lebih yang sering digunakan dalam bidang konstruksi. Metode pengelasan yang digunakan dalam penelitian ini adalah Gas Metal Arc Welding (GMAW) dengan logam pengisi ER70S-6. Pengelasan dilakukan dilakukan pada baja karbon rendah SS400 dengan ukuran panjang 200 mm, lebar 105 mm, dan tebal 12 mm. Tujuan penelitian ini adalah menyelidiki struktur mikro, distorsi, dan sifat mekanik sambungan las GMAW baja karbon rendah akibat variasi posisi pengelasan Posisi pengelasan 1G, 2G, dan 3G. Dari hasil penelitian diketahui bahwa posisi pengelasan 1G menghasilkan distorsi lebih besar dari pada posisi pengelasan 2G dan posisi pengelasan 3G. dimana pada posisi pengelasan 1G nilai distorsi terbesarnya adalah 5,42 mm dengan heat input 1.7 Kj/mm. sedangkan besaran distorsi yang terjadi pada posisi pengelasan 2G nilai distorsi terbesarnya adalah 2,39 mm dengan heat input 0.7 Kj/mm. Dari hasil analisis ditemukan bahwa perbedaan posisi pengelasan menghasilkan jumlah heat input yang berbeda, dengan peningkatan heat input akan meningkatkan besaran distorsi yang terjadi.
ANALISIS KETINGGIAN TOOL PUNCH RIVET TERHADAP HASIL RIVET ING CONTACT PADA SWITCH LAMPU REM MOTOR TIPE C8EA -, Cuncun; -, Paridawati; -, Taufiqullah
Jurnal Ilmiah Teknik Mesin Vol 8 No 2 (2020): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.447 KB) | DOI: 10.33558/jitm.v8i2.2185

Abstract

The product of CBEA Terminal B / B2 Assy is one of the C8EA type Switch components used for brake light switches on two-wheeled vehicles. In the manufacturing process often experience Contact Crack. Contact Crack problems occur in the rivet ing process. This study aims to reduce / eliminate the contact Crack problem, the method used is to conduct research on variations in the height of the punch in the rivet ing process. The initial height of the punch before the research is 49.10 mm, in this study the height of the punch to be examined is 48.60 mm, 48.70 mm, 48.80 mm, 48.90 mm and 49.00 mm. The results obtained for the most appropriate punch height are the height of 48.60 mm with the contact Crack ratio of 3/20, the size of the Crack & contact size entered into the standard, the flexural strength is still standard and the average hardness produced is 92.52 HV which is included in the maximum standard.
Co-Authors -, Cuncun Hamdi, Iqbal Herry Oktadinata Juanda, Muhamad Nur Paridawati -