YUSMANIA, SAPNA (2022) PENGARUH VARIASI ENERGIZER PADA PACK CARBURIZING DENGAN MEDIA ARANG TEMPURUNG KELAPA TERHADAP SIFAT MEKANIK BAJA AISI 4340. Other thesis, UPN 'Veteran" Yogyakarta.
![[thumbnail of Daftar Isi.pdf]](http://eprints.upnyk.ac.id/style/images/fileicons/text.png) |
Text
Daftar Isi.pdf Download (17kB) |
|
Text
Daftar Pustaka.pdf Download (76kB) |
|
Text
Lembar Pengesahan.pdf Download (122kB) |
|
Text
skripsi sapna yusmania full (116180004).pdf Restricted to Repository staff only Download (5MB) |
|
Text
Cover.pdf Download (105kB) |
|
Text
Abstrak .pdf Download (16kB) |
Abstract
ABSTRAK
Perkembangan dunia industri di Indonesia semakin hari semakin
berkembang pesat terutama industri manufaktur. Salah satu baja yang digunakan
dalam kegiatan industri adalah baja AISI 4340 dengan kandungan karbon 0,3-0,85
% wt. Baja karbon dituntut buat memperbaiki sifat-sifatnya seperti ketangguhan,
keuletan, kekerasan bagian atas serta ketahanan terhadap gesekan. pada umumnya
untuk memperoleh sifat-sifat tadi maka perlu dilakukan proses perlakuan panas
(heat treatment) untuk meningkatkan kekerasan pada logam tersebut. salah satu
metode yang bisa diterapkan ialah melalui pack carburizing. Hasil dari pack
carburizing tersebut harus dilakukan beberapa pengujian, seperti uji tarik, uji
kekerasan dan uji impak untuk mengetahui seberapa kuat spesimen tersebut
menahan beban yang akan diberikan.
Dalam penelitian ini menggunakan 3 variasi perbandingan energizer
BaCO3 : Na2CO3 yaitu 40:60 (w/w)%, 50:50 (w/w)%, 60:40 (w/w)%. Dimensi
spesimen uji tarik sesuai dengan standart ASTM E-8 tipe 13a, uji impak sesuai
dengan standart ASTM E-23, uji kekerasan sesuai dengan standart ASTM E-18,
dan uji Struktur Mikro sesuai dengan standart E-3. Sampel diberikan kode seperti
kode spesimen A untuk komposisi 40:60 (w/w)%, kode spesimen B untuk
komposisi 50:50 (w/w)% dan kode spesimen C untuk komposisi 60:40 (w/w)%.
Berdasarkan hasil pengujian tarik menunjukkan bahwa spesimen C
memiliki nilai ultimate tensile strength yang lebih rendah dibandingkan dengan
spesimen lainnya, yaitu 333,43±30,22 MPa. Berdasarkan hasil pengujian impact
yang telah dilakukan dapat diketahui bahwa nilai energi impact terendah terdapat
pada spesimen C yaitu sebesar 4,32±0 joule dan nilai energi impact terbesar
terdapat pada spesimen tanpa perlakuan yaitu sebesar 15,80±0 joule. Hasil
pengujian kekerasan pada spesimen menunjukkan bahwa spesimen C memiliki
kekerasan yang tertinggi dibandingkan dengan kekerasan spesimen lainnya yaitu
sebesar 80,70 HRC sedangkan spesimen tanpa perlakuan sebesar 56,90 HRC.
Pada pengujian struktur mikro terjadi pertambahan fasa setelah dilakukan
perlakuan yaitu terbentuknya fasa martensit.
Kata kunci: Pack Carburizing,Kekuatan Tarik, Kekerasan,Impak,Struktur Mikro
ABSTRACT
The development of the industrial world in Indonesia is growing rapidly,
especially the manufacturing industry. One of the steels used in industrial
activities is AISI 4340 steel with a carbon content of 0.3-0.85% wt. Carbon steel
is required to improve its properties such as toughness, ductility, upper hardness
and resistance to friction. In general, to obtain these properties, it is necessary to
carry out a heat treatment process to increase the hardness of the metal. One
method that can be applied is through pack carburizing. The results of the
carburizing pack must be carried out several tests, such as tensile tests, hardness
tests and impact tests to find out how strong the specimen is to withstand the given
load.
In this study, 3 variations of the ratio energizer of BaCO3 : Na2CO3 were
used, namely 40:60 (w/w)%, 50:50 (w/w)%, 60:40 (w/w)%. The dimensions of the
tensile test specimen are in accordance with the ASTM E-8 type 13a standard, the
impact test is in accordance with the ASTM E-23 standard, the hardness test is in
accordance with the ASTM E-18 standard, and the Microstructure test is in
accordance with the E-3 standard. Samples were given codes such as specimen A
code for composition 40:60 (w/w)%, specimen B code for composition 50:50
(w/w)% and specimen C code for composition 60:40 (w/w)%.
Based on the results of the tensile test, it was shown that specimen C had a
lower ultimate tensile strength value than the other specimens, which was
333.43±30.22 MPa. Based on the results of the impact testing that has been
carried out, it can be seen that the lowest impact energy value is found in
specimen C, which is 4.32±0 joules and the highest impact energy value is found
in specimens without treatment, which is 15.80±0 joules. The results of the
hardness test on the specimen showed that specimen C had the highest hardness
compared to the hardness of other specimens, which was 80.70 HRC while the
untreated specimen was 56.90 HRC. In the microstructure test, there was an
increase in the phase after the treatment, namely the formation of the martensite
phase.
Keywords: Pack Carburizing,Tensile strenght, Hardness,Impact,Microstructure
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Pack Carburizing,Tensile strenght, Hardness,Impact,Microstructure |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 22 Aug 2022 08:18 |
| Last Modified: | 22 Aug 2022 08:18 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/30738 |
Actions (login required)
 |
View Item |