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Analisis Kerusakan pada Chain Link Apron Feeder Muhammad Surya Netrane Jagad Jagad; Nurhabibah Paramitha Eka Utami; Diah Kusuma Pratiwi
Jurnal Rekayasa Mesin Vol. 21 No. 2 (2021): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v21i2.140

Abstract

The use of an Apron feeder with a carrying capacity of 90 tons with a motor with a power of 55 KW and engine speed of 1500 RPM as a container for coal unloading results in train cars and then distributed to a belt conveyor for 24 hours. Based on Standard Operating Procedures (SOP), the apron feeder can accommodate 8 train carriages for 120 minutes of unloading coal. This process initiates the possibility of fatigue in the Apron feeder component, namely the chain link. This study aims to determine the cause of chain link damage in terms of micro structure and strength to the value of hardness by using chain link analysis samples from PT. Acid Hill. Metallographic testing showed the presence of a banded structure in the new sample and the presence of a martensite phase in the damaged sample material, causing the material to become stronger but brittle.
Analisis Kerusakan pada Bushing Apron Feeder abraham hutabarat; Nurhabibah Paramitha Eka Utami; Diah Kusuma Pratiwi
Jurnal Rekayasa Mesin Vol. 21 No. 2 (2021): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v21i2.135

Abstract

The mining industry, especially coal mining, has a transportation and delivery process from one location to another. In the transportation process, there are usually obstacles caused by damage to components that can hinder the delivery process. One of the transportation equipment that often fails is the Apron Feeder. The work process that works continuously and repeated loading can damage the components on the Apron Feeder, one of the components that are often damaged is the Bushing. This study aims to analyze and determine the causes of damage to the Apron Feeder Bushing. The method of this research is by looking at the microstructure of the material, the hardness value of the material, seeing surface defects using a dye penetrant. With the results obtained, namely the number of defects in the form of scratches and porosity in good Bushings which can be the cause of damage to the Bushings and on damaged Bushings, there is martensite which shows that the Bushing is deformed and brittle which results in operations which can be the cause of damage to the Bushing and the results of XRF testing ( X-Ray Fluorescence) the composition of the material on the Bushing is made of AISI 4140 where there is a difference in composition in the original specification of the material, namely SCM 415.
Pengaruh Pencelupan Panas Terhadap Umur Patah dan Laju Korosi ASTM A36 Dalam Aluminium 7xxx Nurhabibah Paramitha Eka Utami; Diah Kusuma Pratiwi
Jurnal Rekayasa Mesin Vol. 20 No. 1 (2020): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v21i1.213

Abstract

The hot dipping method is one of the most commonly chosen measures to protect material from corrosion. The main objective of this study was to analyze the effect of hot dipping time variation in Aluminum 7xxx on corrosion resistance and fracture life of ASTM A36 by conducting corrosion testing, weight reduction measurements and fatigue test analysis. Corrosion test results show that the specimen with a hot dipping time of 2 minutes has a lower corrosion rate and less weight reduction. Observation of age fracture in 1ยบ stress level using Torsee's Torsion Repeated and Bending Fatigue Machine shows that specimens with hot dipping time of 2 minutes in Aluminum 7xxx have a higher fatigue toughness value than specimens with hot dipping time of 1 minute in Aluminum 7xxx and non hot dipping specimens.