Pengaruh Kadar Carbon Dan Silikon (Carbon Equivalent) Terhadap Kekerasan, Struktur Mikro Silinder Liner BM 08 Proses Centrifugal Casting

Djanitra, Rhesa Budi (2008) Pengaruh Kadar Carbon Dan Silikon (Carbon Equivalent) Terhadap Kekerasan, Struktur Mikro Silinder Liner BM 08 Proses Centrifugal Casting. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Silinder liner merupakan komponen untuk melapisi bagian dalam dari silinder blok. Silinder liner berfungsi melindungi silinder blok dari gesekan ring piston, oleh sebab itu silinder liner harus keras dan tahan abrasi. Silinder liner diproduksi melalui proses pengecoran sentrifugal. Komposisi kimia sangat berperan penting dalam mempengaruhi nilai kekerasan, struktur mikro, maupun visual hasil machining, terutama kadar karbon dan silikon. Material yang digunakan adalah gray cast iron dengan standar JIS FC 25 (tensile strength 25 kg/mm²). Penelitian ini dilakukan dengan tujuan untuk menganalisis pengaruh kadar karbon dan silikon (Carbon Equivalent) terhadap kekerasan, struktur mikro, dan visualisasi produk hasil machining silinder liner BM 08, sehingga dapat menentukan komposisi yang paling tepat untuk proses pengecoran sentrifugal BM 08. Hasil penelitian menunjukkan bahwa variasi komposisi kimia yang paling tepat digunakan untuk pengecoran silinder liner BM 08 adalah variasi komposisi dengan persentase kadar karbon 3.1 <= C < 3.30 dan persentase Si: 2.2 <= Si <= 2.4, serta batas persentase carbon equivalent: 3.87 <= CE <= 3.99 dengan karakteristik grafit tipe A, matriks perlitik, kekerasan 216-294 BHN, serta nilai produk yang lebih ekonomis dan efisien.
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Cylinder liner is one of the products resulting from centrifugal casting. Centrifugal casting is a process of pouring liquid metal into a rotary mold. In application, the cylinder liner functions to protect the cylinder block, so it must have high wear resistance. Cylinder liners are produced using centrifugal casting methods. The chemical composition of the liquid metal greatly influences the quality of the cylinder liner product, including its hardness number and the visual appearance of the casting product. In this case, the material used is gray cast iron with JIS standard FC 25 (tensile strength 25 kg/mm²). This research aims to analyze the influence of Carbon Equivalent on the hardness, microstructure, and visualization of the BM 08 cylinder liner to determine the most appropriate composition for BM 08 centrifugal casting. The results show that the chemical composition variation for the BM 08 cylinder liner is 3.1 <= C < 3.30% and 2.2 <= Si <= 2.40%, with a carbon equivalent of 3.87 <= CE <= 3.99%, featuring type A graphite characteristics, a pearlitic matrix, a hardness number of 216-294 BHN, making the product more economical and efficient.

Item Type:	Thesis (Other)
Additional Information:	RSMt 671.35 Dja p
Uncontrolled Keywords:	kadar karbon, kadar silikon, struktur mikro, visual produk, Key word: carbon content, silicon content, hardness, microstructure, product visualization
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ212 Control engineering systems. Automatic machinery (General)
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	magang .
Date Deposited:	22 Sep 2026 08:20
Last Modified:	22 Sep 2026 08:20
URI:	http://repository.its.ac.id/id/eprint/144796

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