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ANALISIS KERUSAKAN PADA BUSHING APRON FEEDER

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Penilaian

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In the mining industry, especially in coal mining, there is a process of loading and unloading from the train carriage to the Belt Conveyor using an Apron Feeder which can accommodate a load of 90 tons. The delivery process is usually hampered due to damage to components, damage is avoided because it can cause losses in the form of safety threats and other losses. The continuous work process and repeated loading can cause the components of this tool to be damaged, one example of which is often damaged is the bushing. Based on the background that has been explained, research related to the analysis of damage to the apron feeder bushing was carried out, the aim was to analyze and determine the causes of damage to the bushing through the value of hardness, microstructure, and see surface defects in the material. The method in this research is carried out by starting a literature study in the form of books, journals, and scientific works to support the research carried out. To determine the mechanical properties of the material, a Brinell hardness test was carried out using a Brinell hardness tester and using the JIS Z 2202 test standard, and a Dye Penetrant Test was carried out to determine if there were defects in the form of porosity, cracks, and the like on the bushing surface, and metallographic testing was carried out to look at the microstructure. For hardness and microstructure testing, specimens are divided into three types, namely: good specimens, damaged specimens, and annealed specimens where the specimen is heated using a furnace at a temperature of 900 C, then allowed to stand in the furnace with a holding time for 1 hour and cooled together. furnace for 24 hours. For Vickers hardness and metallographic testing, the specimens are cut into smaller pieces and then mounted to simplify the testing process. From the Dye Penetrant Test, there are surface defects in the form of scratches and porosity found on the surface of good specimens and damaged specimens, this can be the cause of damage to the bushing. From the results of the Vickers hardness test, good bushing specimens show an average VHN value of 160.58437 N/mm2, then the damaged specimen shows an average VHN value of 255.82869 N/mm2, then the annealed bushing shows an average VHN value. an average of 108.438601 N/mm2, this indicates that the damaged specimen has the highest hardness value because it has undergone deformation caused by operation and working conditions, while the lowest value is owned by the annealed specimen because the purpose of annealing is to release residual stresses and restore initial properties. material to its original state. For the observation of the microstructure using metallographic testing with magnifications of 200x, 500x, and 1000 times there is a lot of porosity in the specimens, both good, damaged, and annealed specimens, and martensite is found in sufficient quantities in damaged specimens which indicate that the specimen has undergone plastic deformation, and in annealed specimens it was found that the pearlite structure became larger which resulted in a softer material.

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Availability

Inventory Code	Barcode	Call Number	Location	Status
2107003075	T53795	T537952021	Central Library (Referens)	Available but not for loan - Not for Loan

Detail Information

Series Title

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Call Number

T537952021

Publisher

Inderalaya : Prodi Teknik Mesin, Fakultas Teknik Universitas Sriwijaya., 2021

Collation

xxvii, 41 hlm. : ilus. ; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

629.250 7

Content Type

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Media Type

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Carrier Type

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Edition

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Subject(s)

Mesin Kendaraan
Prodi Teknik Mesin

Specific Detail Info

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Statement of Responsibility

SEPTA

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