Kurniawan, Kukuh Ardiansani (2016) Pengaruh Temperatur Dan Waktu Tahan Proses Aging Terhadap Struktur Mikro Dan Ketahanan Korosi Pada Baja Tahan Karat Saf 2507 Super Duplex. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
2712100013-undergraduate-theses.pdf - Published Version Download (3MB) | Preview |
Abstract
Baja tahan karat super duplex SAF 2507 adalah material
yang memiliki kombinasi antara sifat mekanik dan ketahanan
terhadap korosi. Namun, kedua properti tersebut dapat
berubah akibat munculnya fasa intermetalik. Tujuan dari
penelitian ini adalah untuk mengetahui pengaruh temperatur
dan waktu tahan proses aging terhadap perubahan struktur
mikro dan ketahanan korosi pada baja tahan karat SAF 2507
Super Duplex. Proses aging yang telah diberikan berpengaruh
pada struktur mikro dari baja tahan karat SAF 2507 Super
Duplex. Munculnya fasa-fasa intermetalik utamanya fasa
sigma (σ) sangat memengaruhi ketahanan korosi dari baja
tahan karat SAF 2507 Super Duplex. Pada baja yang tidak
diberi perlakuan ketahanan korosinya sangat baik ini terlihat
dari pengurangan massa dari hasil uji weight loss, sebesar
0.2mg, sedangkan pada baja SAF 2507 yang diberikan
perlakuan aging dengan temperatur 900°C dan waktu tahan 2
jam fasa sigma (σ) yang muncul sebanyak 47.44% dan seluruh
feritnya bertransformasi menjadi fasa austenit sekunder (γ’)
dan fasa sigma (σ) melalui reaksi eutektoid, akibatnya baja SAF
2507 tersebut mengalami pengurangan massa sebesar
433.10mg dengan Corrosion Rate sebesar 974.10 mpy.
===========================================================
Super Duplex Stainless Steel SAF 2507 has a unique
combination between mechanical properties and corrosion
resistance. However, the mechanical properties and corrosion
resistance change as appearance of some intermetallic phase. The
purposes of this research are to determine effect of various
temperature and holding time of aging process to SAF2507’s
microstructure and corrosion resistance. The aging process affects
the microstructure of Super Duplex Stainless Steel SAF 2507. The
appearance of intermetallic phases especially sigma phase greatly
affected the corrosion resistance of Super Duplex Stainless Steel
SAF 2507. On untreated SAF 2507, the corrosion resistant was
very good seen from mass reduction of 0.2mg, whereas in treated
SAF 2507 with temperature of 900°C and 2 hours of holding time
which brought out the sigma phase with amount of 47.44% and all
the ferrite phase completely transformed into secondary austenite
and sigma phase through eutectoid reaction. As the result, the mass
reduction of that SAF 2507 was about 433.10mg with value of
corrosion rate about 974.10mpy.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 620.112 23 Kur p |
| Uncontrolled Keywords: | temperatur aging, waktu tahan aging, struktur mikro, ketahanan korosi, SAF 2507 |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 01 Nov 2019 08:28 |
| Last Modified: | 01 Nov 2019 08:28 |
| URI: | http://repository.its.ac.id/id/eprint/71545 |
Actions (login required)
 |
View Item |