Analisis Mikrostruktur dan Sifat Mekanik Pelapisan Flame Spray dengan Variasi Rasio NiCrBSi/SiC dan Post-Heat pada Stainless Steel 304

Luthfi, Billy Muhammad (2024) Analisis Mikrostruktur dan Sifat Mekanik Pelapisan Flame Spray dengan Variasi Rasio NiCrBSi/SiC dan Post-Heat pada Stainless Steel 304. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pelapisan flame spray dengan NiCrBSi merupakan salah satu metode yang murah dan mudah untuk pelapisan material untuk pencegahan dari kegagalan permukaan logam pada waterwall tube dikarenakan fireside erosion. Penambahan SiC menjadi material yang dapat dijadikan sebagai penguat material pelapis, karena sifat ketahanan thermal, kekerasan dan ketahanan aus yang cocok diaplikasikan pada tube yang umumnya berbahan dasar stainless steel 304. Dalam pengaplikasiannya diperlukan post-heat yang bertujuan untuk membentuk struktur dan sifat mekanik yang optimal. Pada penelitian ini pelapisan NiCrBSi dilakukan dengan mencampurkan NiCrBSi dan SiC dengan berbagai rasio komposisi (wt%) 0, 10, 20 dan 30. Lalu, spesimen di lakukan post-heat dengan temperatur 890 °C dan 970 °C. Pengujian yang dilakukan adalah uji metalografi, SEM, XRD, kekerasan mikro, adhesi dan kekuatan aus. Mikro struktur yang dihasilkan dengan tanpa post-heat cenderung menghasilkan porositas yang tinggi, dengan adanya inklusi dan partikel unmolten dibanding dengan perlakuan post-heat yang partikel saling berikatan dan pada interfase-nya terdapat lapisan intermetalik. Hasil pelapisan dengan penambahan SiC justru meningkatkan nilai kekerasan dan menurunkan kekuatan adhesi dengan rata-rata 818,5 HV dan 4,57 Mpa, lalu dengan perlakuan post-heat 890 °C dan 970 °C cenderung menurunkan kekerasan mencapai 704,06 HV dan 695,16 HV, dengan peningkatan kekuatan adhesi mencapai 5,80 dan 9,86 MPa. Kelajuan aus (mm3/N.m×10-6) dengan penambahan SiC memperoleh nilai dengan rata-rata 2,0739; post-heat 890 °C dan 970 °C adalah 1,894 dan 1,488. Dari hasil penelitian agar memperoleh hasil pelapisan NiCrBSi/SiC optimal dimana dengan penambahan SiC pada material pelapis perlu dilakukan post-heat dengan temperatur 890 °C.
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Flame spray coating with NiCrBSi is one of the cheap and easy methods for coating materials to prevent metal surface failure on waterwall tubes due to fireside erosion. The addition of SiC is a material that can be used as a reinforcement of coating materials, because of the properties of thermal resistance, hardness and wear resistance that are suitable for application to tubes that are generally made of stainless steel 304. In its application, post-heat is required which aims to form optimal structure and mechanical properties. In this study, NiCrBSi coating was carried out by mixing NiCrBSi and SiC with various composition ratios (wt%) of 0, 10, 20, and 30. Then, the specimens were post-heated with temperatures of 890 °C and 970 °C. The tests carried out are metallography, SEM, XRD, microhardness, adhesion, and wear strength tests. Microstructures produced without post-heat tend to produce high porosity, with inclusions and unmolten particles compared to post-heat treatment where particles are bonded to each other and at the interphase there is an intermetallic layer, the coating results with the addition of SiC actually increase, namely the hardness value and decrease the adhesion strength with an average of 818,5 HV and 4,57 MPa and then with post-heat treatment 890 °C and 970 °C tend to decrease the hardness reached 704,06 HV and 695,16 HV, with an increase in adhesion strength reaching 5,80 and 9,86 MPa. The wear speed (mm3/N.m×10-6) with the addition of SiC yields a value with an average of 2,0739; The post-heat of 890°C and 970°C are 1,894 and 1,488.

Item Type: Thesis (Other)
Uncontrolled Keywords: NiCrBSi, Flame spray, SiC, Post-heat, Temperature, NiCrBSi, Flame spray, SiC, Post-heat, Temperatu.
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing.
T Technology > TA Engineering (General). Civil engineering (General) > TA418.42 Hardness properties and tests. Hardness--Testing.
T Technology > TA Engineering (General). Civil engineering (General) > TA418.9.C57 Coatings
T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials.
T Technology > TA Engineering (General). Civil engineering (General) > TA455.A34 Adhesives
T Technology > TA Engineering (General). Civil engineering (General) > TA491 Metal coating.
T Technology > TJ Mechanical engineering and machinery > TJ263.5 Boilers (general)
T Technology > TJ Mechanical engineering and machinery > TJ561 Surface
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: BILLY MUHAMMAD LUTHFI
Date Deposited: 02 Aug 2024 08:52
Last Modified: 02 Aug 2024 08:52
URI: http://repository.its.ac.id/id/eprint/111664

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