Askara, Praditha Diksi (2016) Pengaruh Temperatur Aging Dan Waktu Tahan Post-Heat Pada Proses Copperizing Terhadap Kekerasan, Ketahanan Korosi , Serta Struktur Mikro Baja Aisi 1006. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Baja karbon sudah cukup memuaskan untuk digunakan
untuk kebutuhan dalam industri. Pennambahan Cu pada baja
struktur telah dilakukan untuk meningkatkan ketahanan korosi.
Penelitian ini dilakukan penambahan Cu melalui proses difusi
pada permukaan baja menggunakan metode copperizing. Setelah
itu diberikan proses tambahan yaitu pemanasan pada temperature
11000 C. Setelah itu dilakukan proses water quenching. Kemudian
dilakukan proses aging pada temperature yang divariasikan.
Struktur mikro sampel hasil copperizing adalah quasi-polygonal
dan acicular ferrite, Semakin tinggi temperature aging semakin
besar ukuran butir sampel, semakin lama waktu post-heat yang
diberikan semakin banyak acicular. Kekerasan maksimum berada
pada sampel dengan proses copperizing dan diberi post-heat 20
menit dan di-aging pada temperature 4000 C dengan nilai
kekerasan 192.77 HV. Laju korosi saja berkurang dengan adanya
proses copperizing karena pada sampel hasil copperizing
membentuk lapisan Cu2O yang menghambat laju korosi.
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Low carbon steel is already have many beneficial for
industrial need, but in some other way low carbon steel cannot
meet the requirement for used.. Each alloying elements give
different effect for steel. Cu in structural steel is proved to
strengthen its corrosion resistance. In this study addition of Cu is
done by diffusion process in steel’s surface. After the process
copperizing is given an additional process of heating at a
temperature 11000 C is done and continued with the process of
water quenching. Then aging process in to be done in some
temperature variation. The microstructure obtained after
copperizing process are acicular and quasi-polygonal ferrite. The
increasing of aging temperature caused the structure to grow and
reduce acicular ferrite content. The longer post-heat temperatur
the more acicular ferrite obtainned in steel. The highest hardness
obtained is at copperizing sampel with 20 minutes post-heat
followed with 4000 C aging temperature, the value is 192.77HV.
Corrosion rate of steel decrease in copperized sample, it is caused
by Cu2O layer formed in the sample’s surface.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 660.284 4 Ask p |
| Uncontrolled Keywords: | difusi, copperizing, microallying, copper |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 04 Nov 2019 03:59 |
| Last Modified: | 04 Nov 2019 03:59 |
| URI: | http://repository.its.ac.id/id/eprint/71577 |
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