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All Journal Rotasi Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) Journal of Environmental Engineering and Sustainable Technology Jurnal Ternak Tropika International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Wahyono Suprapto
Universitas Brawijaya
Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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ECO – INNOVATIVE CARBURIZING: ENHANCING STEEL ST 37 WITH ALABAN CHARCOAL AND EGGSHELL CATALYSTS Ahmad Robittah; Suprapto, Wahyono; Widodo, Teguh Dwi; Wirawan , Willy Artha; Sabitah, A’yan
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.13

Abstract

This study examines the enhancement of St 37 steel through an eco-friendly carburization process using Alaban charcoal and eggshell catalyst. The agriculture sector in South Kalimantan, Indonesia, depends largely on metal tools made from low-carbon steel, which need greater hardness and durability. Traditional carburization techniques are costly and often lead to uneven carbon distribution. This research investigates the use of Alaban wood charcoal and local duck eggshell waste as carburizing agents. The experiment involved varying the weight ratio of charcoal to eggshell powder, then carburizing at 950°C for two hours, followed by water quenching. The results indicated a notable increase in surface carbon content, diffusion depth, hardness, and microstructure of St 37 steel. The optimal combination, achieving the highest surface hardness of 947 HV and a carbon diffusion depth of 1.0 mm, was found at an eggshell catalyst concentration of 30%. All samples exhibited a microstructural change to martensite. These results demonstrate the potential of using agricultural waste to enhance steel properties, promoting more sustainable and cost-effective industrial practices.
Lap Joint Carbon Steel ST 37 and Aluminum 6061 with Friction Stir Welding (FSW) Setiawan, Widia; Darmadi, Djarot B.; Suprapto, Wahyono; Soenoko, Rudy
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2016: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/iseth.2361

Abstract

In this research, Aluminum 6061 and Carbon steel ST 37 sheet were lap joined by friction stir welding. A hardened medium carbonese steel (EMS 45) was used as rotary Probe. The microstructures of the joining inter-metallic compounds were observed by scanning electron microscopy, microstructure photograph, and micro-hardness tests. The joint strength was evaluated by shear stress tests. The experiment was performed with varied length of pin probe 6, 7, and 8 mm, equal rotational speed of 2500 rpm, and welding speed (15 mm/minutes). The Inter-metallic compounds of aluminums sheet was cut off the pin probe and the mixture on the Carbon steel ST 37. Intermetallic compounds were analyzed on its micro sructure in this region aluminum and carbon steel mixed, the value joint tensile shear 6.2KN.
Co-Authors Achmad Noerkhaerin Putra Agung Sugeng Widodo Ahmad Multazam, Ahmad Ahmad Robittah Alfeus Sunarso Anindito Purnowidodo Azam Muzakhim Imamuddin Devi Andriani Dicky Adi Tyagita Djarot B. Darmadi, Djarot B. Dwi Prasetyo Fauzi, Yusuf Rizal Imammuddin, Azam Muzakhim Moch. Agus Choiron Mochammad Junus Mohamad Irkham Mamungkas Pah, Jack Carol Adolf Pratikto Pratikto Pungky Eka Setyawan Putra, Muhammad Rezki Fitri Rudy Soenoko Rudy Soenoko Sabitah, A'yan Setiawan, Widia Slamet Wahyudi Sonief, Achmad As'ad Sonief, Achmad As’ad Sri Mulyo Bondan Respati Sudjito Soeparman Tawaf, Nanang Teguh Dwi Widodo Tjuk Oerbandono Windi Zamrudy Wirawan , Willy Artha Yudy Surya Irawan Yurianto Yurianto Yustian Bella