Studi Eksperimen Proses Interrupted Quenching Pada Friction Wedge Dengan Variasi Waktu Interrupted Quenching

Prastiwi, Neva Dwi (2015) Studi Eksperimen Proses Interrupted Quenching Pada Friction Wedge Dengan Variasi Waktu Interrupted Quenching. Diploma thesis, Institut Technology Sepuluh Nopember.

[img]
Preview
Text
2113105011-Undegraduate Thesis.pdf - Published Version

Download (3MB) | Preview

Abstract

AISI 1340 merupakan salah satu jenis baja paduan rendah yang memiliki komposisi kimia 0,43% C, 1,76% Mn, 0,035% P (max), 0,04% S (max), 0,27% Si. Aplikasi dari baja AISI 1340 digunakan dalam komponen kereta api yaitu friction wedge. Dalam hal ini, friction wedge berfungsi sebagai damper/peredam kereta, sehingga harus mempunyai sifat kekerasan dan ketahanan aus yang tinggi. Penelitian ini dilakukan dengan heat treatment interrupted quenching dimulai dengan pembentukan material menjadi bentuk spesimen uji impact dan uji keausan, dan dilakukan pemanasan dalam furnace hingga temperatur austenisasi 830 °C dengan waktu tahan 2 jam. Setelah proses austenisasi spesimen dikeluarkan dari dalam dapur dan ditahan di udara dengan masing-masing variasi waktu interrupted selama 5, 20 dan 30 detik untuk kemudian di quench dalam larutan pendingin oli. Setelah proses tersebut, material diuji kekerasan, uji metallography, uji impact dan uji keausan. Hasil dari penelitian didapatkan bahwa spesimen dengan variasi waktu interrupted 20 detik adalah waktu interrupted yang tepat. Hasil pengujian impact dan kekerasan menghasilkan peningkatan impact strength dan peningkatan kekerasan tertinggi yaitu dengan kenaikan 24,97 % dan 65,22 %. Berdasarkan hasil uji keausan, keseluruhan permukaan spesimen tidak aus seluruhnya, hanya pada tepi spesimen. Sehingga, pada pengujian keausan perlu dievalusi lebih lanjut. =========================================================================================================== AISI 1340 is one kind of low alloy steel which have a chemical composition of 0.43% C, 1.76% Mn, 0.035% P (max), 0.04% S (max), 0.27% Si. For applications from AISI 1340 steel friction wedge in train component. For this case, the function of friction wedge is for the damper of the train, so that must be have a hardness and high hardness characteristic. This study is done with heat treatment interrupted quenching started with warming on furnace until austenite temperature 830 °C with 2 hours’ time. And then from the austenite temperature the specimen taken out from the furnace and held in the air with each time interrupted variety for 5, 20, and 30 second and then quenched on the cold liquid in this case is oil. After that process, the hardness test, metallography test, impact test, and wear test is given to the materials. The result of this study is the specimen with 20 second interrupted time variety is the best interrupted time. The result of impact and hardness shown increasing of strength impact and hardness, highest value is 24, 97 % and 65, 22 %. According to the hardiness result, all of the specimen surface is not hardiness at all, just on the sides of the specimen. So in the hardiness result need more study and evaluation again.

Item Type: Thesis (Diploma)
Additional Information: RSM 671.36 Pra s
Uncontrolled Keywords: AISI 1340, friction wedge, interrupted quenching, impact strength, kekerasanpermukaan, laju keausan
Subjects: T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 21 Nov 2019 08:02
Last Modified: 21 Nov 2019 08:02
URI: http://repository.its.ac.id/id/eprint/71952

Actions (login required)

View Item View Item