SUCHAIMI, MUHAMMAD (2017) PENGARUH JARAK NOZZLE DAN TEKANAN GAS PADA PROSES PELAPISAN FeCrBMnSi DENGAN METODE WIRE ARC SPRAY TERHADAP KETAHANAN THERMAL. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Low Temperature Hot Corrosion (LTHC) merupakan jenis hot corrosion yang terjadi pada temperatur 700-800°C dan biasa terjadi pada sudu-sudu turbin uap. Akibatnya material pada sudu turbin tersebut mengalami keretakan maupun penurunan efisiensi putaran. Perlindungan terhadap hot corrosion dengan cara memberikan penghalang antara substrat dengan lingkungan salah satunya menggunakan metode pelapisan permukaan logam yaitu wire arc spray. Penelitian ini bertujuan untuk menganalisis pengaruh jarak nozzle dan tekanan gas pada pelapisan FeCrBMnSi dengan metode wire arc spray terhadap ketahanan thermal. Dari parameter jarak nozzle dan tekanan gas yang digunakan, didapatkan parameter terbaik yaitu pada jarak 400 mm dan tekanan gas 3 bar yang mempunyai kekuatan lekat sebesar 22,58 MPa dengan persentase porositas 5,93% dan nilai kekasaran permukaan sebesar 16,36 μm. Sedangkan pada pengujian thermal cycle yang dilakukan dengan cara pemanasan dan pendinginan secara kontinyu, pada permukaan coating terbentuk senyawa oksida Fe3O4 yang menyebabkan perambatan retak dan delaminasi. Selain itu kekerasan lapisan coating meningkat akibat adanya senyawa precipitate boride (Fe9B)0,2.
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Low Temperature Hot Corrosion (LTHC) is type of hot corrosion which occured on 700-800oC and usually on turbine blades. So, as a result the material of turbine blades is crack and degredation of rotation efficiency. Hot corrosion protection with the use of barrier that separate substrate and environment is one of using metal surface coating, wire arc spray method. This study has a purpose to analyze the effect of nozzle distance and gas pressure on FeCrBMnSi coating process using wire arc spray method on thermal resistance. The parameter of nozzle distance and gas pressure are used, resulted the best parameter on distance 400 mm and gas pressure 3 bar which has the bond strength of 12,58 MPa with porosity percentage of 5,93% and roughness values of 16,36 μm. While the examination of thermal cycle which by heating and cooling continuously, on the coating surface is formed oxide compound (Fe3O4) which cause formed crack propagation and delamination. Beside that hardness of coating surface is increase which caused by precipitate boride (Fe9B)0,2
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Coating, Wire Arc Spray, FeCrBMnSi, Jarak Nozzle, Tekanan Gas, Ketahanan Thermal, SS 304, Nozzle Distance, Gas Pressure, Thermal Resistance |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | MUHAMMAD SUCHAIMI - |
| Date Deposited: | 26 Jan 2017 03:03 |
| Last Modified: | 05 Mar 2019 02:55 |
| URI: | http://repository.its.ac.id/id/eprint/1526 |
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