ANALISIS PENGARUH VARIASI SUHU QUENCHING DENGAN OLI TERHADAP KEKERASAN DAN STRUKTUR MIKRO BAJA CHROME UNTUK APLIKASI HAMMER CRUSHER

Ramdani, Ramdani (2022) ANALISIS PENGARUH VARIASI SUHU QUENCHING DENGAN OLI TERHADAP KEKERASAN DAN STRUKTUR MIKRO BAJA CHROME UNTUK APLIKASI HAMMER CRUSHER. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Hammer crusher is used to crush raw material in the form of limestone taken from the mining site.This makes the hammer crusher an important component in the cement manufacturing process.Hammer crushers are often subjected to wear and tear, reducing the service life of the hammer crusher.The hardening process was carried out at the temperatures of 850°C, 900°C, and 950°C with the lasting time of 30 minutes, which was then quenched with oil cooling media to increase the hardness and find out the microstructure of chrome steel. The results of the study obtained an average hardness value (as-cast) of 26.07 HRC, the temperature of 850 °C got 27.59 HRC, the temperature of 900 °C got 26.63 HRC, and the temperature of 900 °C got 23.94 HRC.The highest hardness was obtained in specimens of temperatures of 850°C but the difference was not very significant.From the results of the microstructure test, there was a change in the grain boundary and the rounded morphology of carbide as the heating temperature increases.

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