PENGARUH VARIASI MEDIA PENDINGIN QUENCHING TERHADAP KEKERASAN DAN STRUKTUR MIKRO BESI COR KELABU

NOVA RAHMAD, ARIF (2019) PENGARUH VARIASI MEDIA PENDINGIN QUENCHING TERHADAP KEKERASAN DAN STRUKTUR MIKRO BESI COR KELABU. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Gray cast iron is a good vibration damper or has high damping capacity. It is generally widely used as an engine base, connecting shaft and heavy equipment. This research was conducted to investigate the effects of cooling media on the hardness and microstructure of cast iron. This research was given a heat treatment with a heating temperature of 900º C, holding time of 20 minutes, then it was cooled quickly with a variation of the cooling media in the form of oil and water. The material used is gray cast iron. The results of gray cast iron hardness test get the lowest hardness value in raw material of 233,662 BHN and the highest hardness was obtained in water media quenching of 502, 146 BHN. Therefore, the water media is good to be used as quenching, because it is easily available, costs effective and can increase the hardness of material.

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