Ashari, Azhar (2015) Studi Eksperimen Proses Interrupted Quenching Pada Friction Wedge Dengan Variasi Media Quenching. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
2113105008-Undergraduate-Thesis.pdf Download (2MB) | Preview |
Abstract
Friction wedge merupakan peredam kejut (damper) pada
bogie kereta api yang berfungsi untuk meredam hentakan yang
timbul saat kereta berjalan. Friction wedge bekerja dengan cara
bergesekkan dengan side frame yang telah diberi plat mangan.
Bahan dasar friction wedge adalah baja AISI 1340 yang dibentuk
melalui proses pengecoran. Peningkatan kekerasan dan
ketahanan aus dilakukan agar life-cycle dari friction wedge
panjang. Peningkatan kekekerasan dapat dilakukan melalui
proses quenching, salah satu modifikasi dari proses quenching
adalah proses interrupted quenching.
Proses perlakuan panas interrupted quenching dilakukan
pada benda uji friction wedge yang telah dibentuk sesuai standar
pengujian, dengan pemanasan dalam dapur sampai mencapai
temperatur austenisasi 830⁰C dan waktu tahan 2 jam. Proses
dilanjutkan dengan penahanan benda uji di media udara selama
20 detik. Setelah penahanan di udara, benda uji diquenching
pada media quenching masing-masing air, oli, dan polimer.
Pengujian yang dilakukan setelah proses interrupted quenching
antara lain, uji metallography, uji kekerasan, uji impak, dan uji
keausan.
Pada penelitian ini didapatkan bahwa media quenching air
adalah media quenching yang optimum pada proses interrupted
quenching, dengan peningkatan kekerasan sebesar 195% dari
benda uji as cast, peningkatan impact strength sebesar 3% dari
benda uji as cast, dan struktur mikro yang dominan adalah
v
martensite. Pengujian keausan yang digunakan pada penelitian
ini perlu dilakukan evaluasi.
====================================================================================================
Friction wedge is shock absorber (damper) on train’s
bogie that has function to absorb shock or impact when train
moves. Friction wedge works by rubbing with side frame that
coated with mangan’s plate. Base material of friction wedge is
AISI 1340 steel that made from casting. Hardness increment and
wear resistance is used to increase life-cycle of friction wedge.
Quenching process is used to increase hardness, one of the
modified quenching process is interrupted quenching.
Heat treatment of interrupted quenching is applied to
friction wedge that has made as test standards, by heating in
furnance until austenitized temperature 830⁰C and holding time 2
hours. After holding time, specimen is put on free air for 20
seconds. After that, specimen is quenched on quenching media
variant respectively water, oil, and polymer. Tests that used on
this study are, impact test, hardness test, metallography test, and
wear resistance test.
On this study, it is found that quenching water is optimum
quenching media for interrupted quenching process, with
hardness increement 195% from as cast, wear resistance
increement 25% from as cast, impact strength increement 3%
from as cast, and dominant micro structure is martensite. Wear
resistance test that used on this study need to be evaluated.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 671.36 Ash s |
| Uncontrolled Keywords: | friction wedge, bogie, interrupted quenching, media quenching |
| Subjects: | T Technology > TS Manufactures > TS699 Powder coating of metals |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 17 Dec 2019 06:45 |
| Last Modified: | 17 Dec 2019 06:45 |
| URI: | http://repository.its.ac.id/id/eprint/72399 |
Actions (login required)
 |
View Item |