Pengaruh Penambahan Kromium (Cr) Terhadap Sifat Kekerasan dan Struktur Mikro Paduan Fe-Cr-Ni melalui Proses Pengecoran dengan Menggunakan Electric Arc Furnace

Gunawan, Marvin Suganda (2016) Pengaruh Penambahan Kromium (Cr) Terhadap Sifat Kekerasan dan Struktur Mikro Paduan Fe-Cr-Ni melalui Proses Pengecoran dengan Menggunakan Electric Arc Furnace. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perubahan kekerasan dan struktur mikro paduan Fe-Cr-Ni yang ditambahkan krom telah dipelajari. Penambahan krom sebanyak 18, 20, 22, 24 %wt bertujuan untuk meningkatkan sifat kekerasan paduan. Dengan memiliki kekerasan yang tinggi, paduan dapat diaplikasikan di peralatan teknik seperti cryogenic vessels, heat exchangers, dan pipa. Pengaruh penambahan kromium pada paduan akan dikarakterisasi dengan Optical Emission Spectroscopy, kekerasan, metalografi, EDX, dan X-Ray Diffraction. Peleburan paduan dilakukan dengan menggunakan Electric Arc Furnace. Studi ini menghasilkan pembuatan Fe-Cr-Ni yang lebih cepat dibandingkan dengan studi sebelumnya. Penambahan krom pada paduan Fe-Cr-Ni mengakibatkan naiknya kekerasan serta komposisi krom pada paduan. Hasil paduan menunjukkan fasa austenite, dan karbida krom. Mikrostruktur paduan juga berubah dari ferrite dan pearlite, menjadi austenite dan karbida krom. ================================================================================ The transformation of hardness and microstructure of Chrome addition in Fe-Cr-Ni alloy was studied. 18,20,22,24 %wt Chrome was added to improve a hardness value of the alloy. By improving the hardness value, the alloy can be applied to engineering equipment such as cryogenic vessels, heat exchangers, and pipelines. The experimental alloy was melted in an electric arc furnace, and casted to a refractory brick. The transformation structures were characterized using Optical Emission Spectroscopy, Brinell hardness, metallography, EDX and X-Ray Diffraction. This study deliver a faster way to produce Fe-Cr-Ni alloy compared to previous research. Chrome additions improved the hardness value, as well as the chemical composition of the alloy. The microstructure of resulted alloy changed from chrome carbide,and pearlite to austenite, and chrome carbide phase.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 671.2 Gun p
Uncontrolled Keywords: Fe-Cr-Ni; Kromium; Kekerasan; Struktur mikro
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > (S1) Undergraduate Theses
Depositing User: Mrs Anis Wulandari
Date Deposited: 21 Jun 2017 06:05
Last Modified: 26 Dec 2018 08:24
URI: http://repository.its.ac.id/id/eprint/41798

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