Hariyanto, Gemilang Fajar (2020) Pengaruh Temperatur Reaksi Proses Thermo Reactive Diffusion Terhadap Pembentukan Lapisan Niobium Karbida Pada AISI 440C. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Thermo-reactive difusion (TRD) adalah proses suhu tinggi untuk memproduksi lapisan logam karbida keras pada substrat yang mengandung karbon. Dalam penelitian ini, pelapis niobium karbida (NbC) diberikan kepada martensitic steel AISI 440C. Penelitian ini akan mengeksplorasi pengaruh variasi temperatur proses TRD terhadap pembentukan lapisan niobium pada permukaan AISI 440C. Proses TRD dilakukan dengan metode powder pack berupa wadah baja tertutup yang mengandung campuran bubuk niobium sebagai paduan utama, alumina (Al2O3) sebagai innert filler dan amonium klorida (NH4Cl) sebagai aktivator. Kemudian spesimen ditutup dengan campuran tersebut dan dipanaskan dalam dapur listrik pada temperatur 800oC, 900oC, 1000oC dan 1100oC selama 6 jam. Hasil penelitian menunjukkan bahwa ketebalan lapisan niobium karbida meningkat seiring meningkatnya temperatur pemanasan proses thermo teactive diffusion dengan penahanan waktu yang sama. Nilai kekerasan spesimen yang diberikan proses thermo reactive diffusion mengalami kenaikan dengan naiknya temperatur pemansan. Akan tetapi laju pembentukan lapisan niobium karbida mulai mengalami penurunan pada temperatur pemanasan 1000oC. Hal ini terjadi dikarenakan makin berkurangnya kandungan karbon yang tersedia dari base material yang dapat berdifusi ke permukaan untuk berikatan dengan niobium.
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Thermo-reactive diffusion (TRD) is a high-temperature process for producing hard metal carbide coatings on carboncontaining substrates. In this study, niobium carbide (NbC) coatings were given to AISI 440C martensitic steel. This research will explore the effect of variations in the temperature of the TRD process on the formation of niobium layers on the surface of AISI 440C. The TRD process is carried out by a powder pack method in the form of a closed steel container containing a mixture of niobium powder as the main alloy, alumina (Al2O3) as an innert filler and ammonium chloride (NH4Cl) as an activator. Then the specimen is closed with the mixture and heated in an electric kitchen at temperatures of 800oC, 900oC, 1000oC and 1100oC for 6 hours. The results showed that the thickness of the niobium carbide layer increased with increasing heating temperature of the thermo teactive diffusion process with the same holding time. The hardness of specimens given the thermo reactive diffusion process increases with increasing heating temperature. However, the rate of formation of the niobium carbide layer began to decrease at a heating temperature of 1000oC. This happens because of the reduced carbon content available from the base material that can diffuse to the surface to bind with niobium.
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | thermo-reactive diffusion, Martensitic Stainless Steel, Pengerasan permukaan. |
Subjects: | T Technology > TS Manufactures > TS699 Powder coating of metals |
Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
Depositing User: | Hariyanto Gemilang Fajar |
Date Deposited: | 18 Dec 2024 01:59 |
Last Modified: | 18 Dec 2024 01:59 |
URI: | http://repository.its.ac.id/id/eprint/73933 |
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