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All Journal Rotasi SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Sistem : Jurnal Ilmu-Ilmu Teknik Jurnal Elkolind : Jurnal Elektronika dan Otomasi Industri Otopro Jurnal Pendidikan Teknik Mesin Undiksha Journal of Mechanical and Electrical Technology Jurnal Masyarakat Madani Indonesia Sewagati Journal of Evrimata: Engineering and Physics Welfare: Jurnal Pengabdian Masyarakat Journal of Community Engagement
Talifatim Machfuroh, Talifatim
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Journal : Otopro

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PENGARUH TEMPERATUR PEMANASAN DAN MEDIA PENDINGINAN PADA PROSES FLAME HARDENING TERHADAP NILAI KEKERASAN PADA BAJA S45C Machfuroh, Talifatim; Lostari, Aini; Ulum, Miftahul; Pramartaningthyas, Ellys Kumala
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p1-6

Abstract

Sprocket is one of the main components in two-wheeled vehicles that transfer the rotary force from the engine to the rear wheels of the motorcycle. Because of this main function, the sprocket wears out faster due to friction between the chain and the sprocket. Therefore, a heat treatment process is needed to improve the mechanical properties of steel to make it more resistant to friction. Based on this background, this research focuses on the effect of temperature and cooling media on the hardness level of the material that receiving heat treatment in the form of flame hardening. The material used is S45C steel. The heat treatment process is carried out on steel with heating temperatures of 750º C and 850º C. After being heated, the steel will be quenched quickly with cooling media in the form of fresh water and turalic oil 48 ISO VG 46. Next, the hardness analysis process is carried out on the test object. From the results of the hardness test, it was found that the highest average hardness value was produced by the test object which underwent a flame hardening process at a temperature of 850 oC with fresh water cooling medium, which was 335.333 HB. Fresh water cooling media tends to produce higher hardness values ​​than turalic oil. This is because the cooling rate of fresh water is faster than oil.
PENGARUH KECEPATAN PENGELASAN MIG TERHADAP KEKUATAN TARIK DAN PERUBAHAN STRUKTUR PATAHAN MAKRO PADA SAMBUNGAN ALUMINIUM Witono, Kris; Machfuroh, Talifatim; Agustriyana, Lisa; Rosady, Siti Duratun Nasiqiati
Otopro Vol 21 No 1 Nov 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v21n1.p6-12

Abstract

MIG (Metal Inert Gas) welding is a welding process that uses rolled electrodes which are the same as the base metal and uses a protective gas.  Aluminum is one of the most commonly used metals in the industrial world. Connecting aluminum by welding is a challenge in itself because of its high heat conductivity. This is why a lot of research has been carried out on welding aluminum. This research aims to investigate the effect of travel speed on the tensile strength and macro structure of welds from the robotic welding process. The research was carried out using experimental methods and observing the macro structure of the fracture results. The research results, it was found that changes in welding speed (travel speed) in the aluminum MIG welding process showed a decreasing trend in maximum tensile strength. The highest tensile strength was obtained at the TS variation of 40 mm/minute, while at TS 70 mm/minute the tensile strength was lower. The higher the welding speed, the lower the resulting tensile strength. This is due to reduced heat applied which affects weld penetration and metal joining. A lower welding speed results in better penetration and higher tensile strength, but a speed that is too slow can cause overheating and damage the metal micro structure. The macro structure of the fracture, it was found that higher welding speeds cause fractures that tend to be brittle with defects such as porosity, which can also reduce tensile strength
Co-Authors Aini, Fica Aida Nadhifatul Amalia, Zakiyah Bagasworo, Fiqqo Azis Eka Perkasa, Rilis Ekasari, Silvia Rahmi Eko Yudiyanto Ellys Kumala Pramartaningthyas, Ellys Kumala Erni Yudaningtyas Etik Puspitasari, Etik Farida, Nike Nur Fatkhur Rohman Fica Aida Nadhifatul Aini Ghufron, Wildanul Khabib, Achsanul Khambali, Khambali Kris Witono Lisa Agustriyana Lostari, Aini Miftahul Ulum Monasari, Ratna N. R., Siti Duratun Nadhifatul Aini, Fica Aida Nicky Suwandhy Widhi Supriyanto Nurhadi Nurwicaksana, Wahyu Aulia Perkasa, Rilis Eka Riskitasari, Septyana Sari, Nurlia Pramita Satworo Adiwidodo Siti Duratun Nasiqiati Rosady Siti Duratun Nasiqiati Rosady Susastro, Susastro Yayi Febdia Pradani