PENGARUH VARIASI MEDIA QUENCHING PADA PROSES HEAT TREATMENT TERHADAP KEKERASAN DAN STRUKTUR MIKRO BESI COR NODULAR FCD-45

Bram Enrico, Constantin (2023) PENGARUH VARIASI MEDIA QUENCHING PADA PROSES HEAT TREATMENT TERHADAP KEKERASAN DAN STRUKTUR MIKRO BESI COR NODULAR FCD-45. Thesis thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Nodular cast iron is iron with almost the same level of ductility and is equivalent to steel, nodular cast iron is generally widely used as crankshafts, steel pipes, cylinder heads and gears. To obtain good mechanical properties, a qenching process can be carried out including using water, sea water and coolant as a variety of cooling media. The purpose of the quenching process is to increase the hardness of the metal and produce a microstructure on the metal. This research was conducted to determine the effect of variations in cooling media on the quenching process on the hardness and microstructure of nodular cast iron FCD-45. This research was given heat treatment with a heating temperature of 950°C and holding time 30 minutes then cooled rapidly with variations Cooling media in the form of water, sea water, and coolant. FCD-45 nodular cast iron test results obtained the lowest hardness value on raw material 52.05 HRC The highest hardness was obtained on coolant cooling media with a hardness of 85.87 HRC, whereas with water cooling media obtained a hardness of 77.51 HRC and with water media the sea gets a hardness of 84.99 HRC.

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