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All Journal Jurnal Ilmiah Teknik Mesin Tekinfo | Scientific Journal of Industrial and Information Engineering
Supriyanto Wibowo
Unknown Affiliation
Automotive Engineering Computer Science & IT Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISIS PENGARUH WAKTU TAHAN (HOLDING TIME) TERHADAP KEKERASAN BAJA AISI 4140 DENGAN METODE PACK CARBURIZING MEDIA ARANG BAMBU Danel Saputro; Gery Setiadi; Supriyanto Wibowo
Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (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.v7i1.1907

Abstract

Carburizing is a heat treatment process with the addition of carbon content to the metal surface. To obtain the microstructure and the desired properties of the metal can be obtained through the heating and cooling process at a certain temperature. To get a high hardness value after the carburization process of the workpiece, the quenching process is carried out, namely the rapid cooling process, so that the martensitic phase is obtained. AISI 4140 steel is one type of steel that is widely used in engine components such as piston pins. The piston pin is usually made of medium carbon steel AISI 4140. Based on its application this steel was developed with the aim of having mechanical properties especially hardness, strength and resistance to wear. This study tested the hardness of AISI 4140 steel before and after the solid carburizing process using 80% bamboo charcoal as carbon and 20% Barium Carbonate as a catalyst, with a holding time of 60, 90, and 120 minutes using oil quenching media. The results obtained showed an increase in the highest hardness value at the holding time of 120 minutes.
PENGARUH POLARITAS PADA KEKERASAN DAN STRUKTUR MIKRO LAS SMAW MATERIAL ST 40 ELEKTRODA E 6013 Fande Febrian N. F; Paridawati -; Supriyanto Wibowo
Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2018): 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.v6i2.1928

Abstract

The welding process on the steel causes mechanical properties such as residual stress and poorpenetration, this is because it can be caused by the use of polarity in welding because the theory forpolarity use is adjusted to the materialto be welded, thisresearch aims to know the the effect ofpolarity on ST 40 plate steel material with electrode E 6013. This method uses two methods ofwelding the first straight and second polarity method using reverse polarity method using reversepolarity method using ST 40 steel material (60 mm x 27,5 mm x 10 mm), then using hardnesstesting and microstruktur testing. The result of the research and calculation of known highhardness value 148,67 HR and for microstructure test result there is ferrite and perlite microstructure on raw material, and for welding area and HAZ grain area become more smooth due tohigh heat exposure so that the structure becomes finer, and the structure is formed ferrite andperlite with accicular ferrite lines. This to solve the problem when it is cracked or broken at thewelding area on the component convenyor between axle connecting with drive roll can be causeddue to incorrect use of polarity.
Analisa Kelayakan Investasi Pembangunan Fasilitas Pemanfaatan Alternatif Bahan Baku dan Bahan Bakar di PT. X Bekti Nugrahadi; Supriyanto Wibowo; Agung Widiyanto Fajar Sutrisno; Erna Indriastiningsih
Tekinfo: Jurnal Ilmiah Teknik Industri dan Informasi Vol 13 No 2 (2025)
Publisher : Program Studi Teknik Industri Universitas Setia Budi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31001/tekinfo.v13i2.2535

Abstract

Indonesia's manufacturing sector has grown, which affects the amount of waste produced. Waste must be managed by the companies that generate it; if they are unable to do so, the waste may be turned over to a third party. PT. X is a business that works in manufacturing, particularly in the cement sector. PT. X is dedicated to producing fuel, raw materials, and energy sources that are efficient in its production process. In order to meet the company's long-term plan goal of increasing the substitution of energy sources, raw materials, and fuel, facilities for using waste as raw materials and alternative raw materials must be built. The purpose of this study is to obtain the results of a feasibility study on the investment in the construction of these facilities. The data used in this study are primary data in the form of waste potential, company technical data, investment data, operational data and interviews as secondary data. The methods used in this study are Net Present Value (NPV), Payback Period (PP), and Internal Rate Of Return (IRR). The results of this study obtained a payback period value of 5 years 7 months, an NPV of 6,784,925,409 (NPV > 0), and an IRR of 15.85% so that the investment is feasible to continue.
Co-Authors Agung Widiyanto Fajar Sutrisno Bekti Nugrahadi Danel Saputro Fande Febrian N. F Gery Setiadi Indriastiningsih, Erna Paridawati -