PENGARUH PERLAKUAN PANAS HARDENING DENGAN MEDIA PENDINGIN OLI DAN AIR GARAM PADA BAJA AISI 1042 TERHADAP KEKERASAN DAN STRUKTUR MIKRO

Donny, Febriansyah (2026) PENGARUH PERLAKUAN PANAS HARDENING DENGAN MEDIA PENDINGIN OLI DAN AIR GARAM PADA BAJA AISI 1042 TERHADAP KEKERASAN DAN STRUKTUR MIKRO. S-1 thesis, 021008 Universitas Tridinanti.

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Abstract

AISI 1042 steel is a medium-carbon steel whose mechanical properties can be improved through heat treatment. This study aims to determine the effect of the hardening process using oil and salt-water quenching media on the hardness and microstructure of AISI 1042 steel. The hardening process was carried out at temperatures of 830°C and 840°C with a holding time of 15 minutes, followed by Rockwell C hardness testing and microstructural observation. The results showed that the untreated specimen had an average hardness of 7.9 HRC. After hardening, the average hardness values were 9.8 HRC at 830°C with oil, 37.4 HRC at 830°C with salt water, 11.8 HRC at 840°C with oil, and 39.6 HRC at 840°C with salt water. The highest hardness value was obtained at 840°C using salt water as the quenching medium. Microstructural observations showed that the untreated specimen consisted of ferrite and pearlite, while after hardening, structures interpreted as martensite were observed. Salt-water quenching produced higher hardness values than oil quenching. Therefore, the hardening temperature and quenching medium affect the hardness and microstructure of AISI 1042 steel. Keywords: AISI 1042 steel, hardening, oil, salt water, hardness, microstructure.

Item Type:	Thesis (S-1)
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Fakultas Teknik > S1 Teknik Mesin
Depositing User:	Tn DONNY FEBRIANSYAH
Date Deposited:	24 Oct 2026 01:42
Last Modified:	24 Oct 2026 01:42
URI:	http://repository.univ-tridinanti.ac.id/id/eprint/11548

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