Pengaruh Thermal Cycle terhadap Ketahanan Abrasif dan Adhesi Pelapisan NiCrWCFe pada SS 304 dengan Metode Thermal Arc Spray

Susila, Panji Harga (2017) Pengaruh Thermal Cycle terhadap Ketahanan Abrasif dan Adhesi Pelapisan NiCrWCFe pada SS 304 dengan Metode Thermal Arc Spray. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pelapisan logam dengan metode thermal arc spray merupakan solusi untuk perlindungan material terhadap lingkungan khususnya pada boiler. Erosi pada superheater tube yang merupakan komponen dari coal fired-boiler disebabkan oleh partikel debu (fly ash) yang berasal dari pembakaran batu bara. Penelitian ini mensimulasikan kondisi atmosfer boiler yang beroperasi pada temperatur tinggi dengan suatu metode thermal cycle yang bertujuan untuk menganalisis pengaruh thermal cycle pada pelapisan NiCrWCFe dengan metode thermal arc spray terhadap struktur mikro dan sifat mekanik. Thermal cycle meningkatkan ketahanan abrasi lapisan dengan pengurangan berat hingga sebesar 0,0152 g/cm2 di 10-cycle dibandingkan dengan tanpa cycle sebesar 0,5310 g/cm2. Pada hasil SEM, thermal cycle menurunkan porositas hingga mencapai 2,358% di 10-cycle. Uji XRD dan EDS menampilkan terbentuknya senyawa oksida seperti CrO, FeO, dan FeCr2O4. Thermal cycle meningkatkan kekuatan adhesi lapisan dibuktikan dengan hasil uji pull-off di 10-cycle mencapai 11,24 MPa. Thermal cycle juga meningkatkan kekerasan mikro dan mencapai 883,7 Hv di 5-cycle tetapi thermal cycle juga menurunkan nilai kekasaran permukaan hingga pada 10-cycle mencapai 8,49 µm. ================================================================== Metallic coating with thermal arc spray method is a solution to protect materials from the environment, especially in boiler. Erosion occurred on superheater tube that is a component from coal-fired boiler caused by flying ash from coal combustion. The boiler atmosphere condition that operate at high temperature is simulated on this study with thermal cycle method and the purpose of this study is to analyze the effect of thermal cycle on NiCrWCFe coating with thermal arc spray method on it’s micro structure and mechanical properties. Thermal cycle increased the abrasive resistance of coating with the lowest weight loss results is at 10th-cycle with 0,0152 g/cm2 rather than without thermal cycle with 0,531 g/cm2. SEM result showed that thermal cycle decrease the porosity until 2,358% at 10th- cycle. XRD and EDS test showed that the coating formed oxide compound like CrO , FeO, and FeCr2O4. Thermal cycle increased the adhesive strength of coating, proved by pull-off test results at 10th-cycle reached 11,24 MPa. Thermal cycle also increased the micro hardness value that reached 883,7 Hv at 5th-cycle but thermal cycle also decreased the surface roughness until at 10th- cycle with 8,49 µm.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 671.73 Sus p
Uncontrolled Keywords: Boiler, Thermal Arc-spray, NiCrWCFe, Thermal Cycle
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: Panji Harga Susila
Date Deposited: 03 Nov 2017 03:23
Last Modified: 05 Mar 2019 04:13
URI: http://repository.its.ac.id/id/eprint/42622

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