Pengaruh Proses Copperizing Terhadap Struktur Mikro AISI 1006 Dengan Variasi Temperatur Pre-Heat Dan Immerse Time

Zailindra, Tio (2016) Pengaruh Proses Copperizing Terhadap Struktur Mikro AISI 1006 Dengan Variasi Temperatur Pre-Heat Dan Immerse Time. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pemaduan besi dengan tembaga diketahui mampu meningkatkan kekuatan dengan diimbangi dengan keuletan. Studi ini bertujuan untuk mengetahui efektifitas proses copperizing dibandingkan dengan metode pengecoran ataupun metalurgi serbuk dengan mengetahui presentase Cu yang mampu berdifusi, membedakan kondisi fisik Fe sebelum dan setelah copperizing, menganalisis pembentukan fasa dan perubahan ukuran butir akibat proses serta menganalisis pola persebaran Cu di dalamnya menggunakan variasi temperature pre-heat dan waktu celup. Raw material berupa AISI 1006 dipreparasi dengan membersihkan bagian permukaan, proses copperizing dimulai dilakukan melakukan preheat terhadap baja dengan variasi temperatur 800°C dan 900°C lalu dicelupkan ke dalam tembaga cair selama beberapa saat, waktu celup yang divariasikan antara lain 3 menit, 5 menit, dan 7 menit sedangkan pendinginannya dilakukan di udara. Pengujian yang dilakukan terhadap sampel meliputi: Pengamatan Makro, OES, XRD, SEM/EDX, dan pengamatan Metalografi. Berdasarkan Pengamatan makro seluruh spesimen membentuk lapisan Cu. Spesimen dengan pre-heat 800°C membentuk lapisan relative lebih renggang dibandingkan 900°C menghasilkan mampu mendifusikan Cu lebih baik hal tersebut juga ditunjang dari pengujian OES. Hasil XRD menunjukkan bahwa spesimen dengan pre-heat 800°C, Cu menghasilkan fasa tersendiri akibat komposisi yang melebihi batas kelarutannya di dalam Fe-α. Pengujian SEM/EDX membuktikan bahwa Cu terkonsentrasi pada bagian batas butir serta membentuk pola persebaran dari dari luar ke dalam. Perubahan ukuran butir juga terlihat setelah melakukan pengamatan metalografi serta perhitungan ukuran butir dengan metode intercept, hasilnya seiring dengan penambahan Cu maka ukuran butir semakin mengecil. ======================================================================================================================== Iron alloy with copper known to increase to offset the rise to power of tenacity. This study aims to determine the effectiveness of the copperizing process compared with the method of casting or powder metallurgy to determine the percentage of Cu were able to diffuse, distinguishing physical condition Fe before and after copperizing, analyzing the phase formation and changes in grain size due to process and analyze the pattern of distribution of Cu in it using a variation pre-heat temperature and immersion time. Raw materials such as AISI 1006 was prepared by cleaning the surface, the copperizing process begins conducted pre-heat to the steel with temperature variation of 800°C and 900°C and then dipped in molten copper for a few moments, a dye which varied between another 3 minutes, 5 minutes, and 7 minutes while cooling is done in air. Tests conducted on samples include: Observation Macro, OES, XRD, SEM / EDX, and observations Metallography. Based on the observation of macroscopic observation entire specimen form a Cu layer. Specimens with pre-heat to 800°C to form a layer of relatively more tenuous than 900°C produce Cu better able to diffuse it also supported from testing OES. XRD results showed that specimens with pre-heat to 800°C, Cu produces its own phase due to the composition exceeds the limit of solubility in Fe-α. Testing SEM / EDX prove that Cu is concentrated at the grain boundaries and form a distribution pattern from the outside to the inside. Changes in grain size was also seen after metallographic observation and calculation methods intercept grain size, the results are in line with the addition of Cu, the grain size is getting smaller.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 620.17 Zai p
Uncontrolled Keywords: Copperizing, Pre-heat, Immerse time, Difusi, Komposisi, Fasa, Ukuran butir.
Subjects: T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: Users 13 not found.
Date Deposited: 06 Sep 2017 02:37
Last Modified: 27 Dec 2018 04:31
URI: http://repository.its.ac.id/id/eprint/48794

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