PENGARUH PROSES HARDENING BAJA AISI 1040 DENGAN MEDIA PENDINGIN AIR GARAM DAN AIR LAUT TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO

Randy, Bangsawan (2026) PENGARUH PROSES HARDENING BAJA AISI 1040 DENGAN MEDIA PENDINGIN AIR GARAM DAN AIR LAUT TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO. S-1 thesis, 021008 Universitas Tridinanti.

[img] Text (BAB I)
BAB I.pdf - Published Version
Download (1MB)
[img] Text (BAB II)
BAB 2.pdf - Published Version
Restricted to Repository staff only
Download (324kB) | Request a copy
[img] Text (BAB III)
BAB 3 (2).pdf - Published Version
Restricted to Repository staff only
Download (292kB) | Request a copy
[img] Text (BAB IV)
BAB 4.pdf - Published Version
Restricted to Repository staff only
Download (319kB) | Request a copy
[img] Text (BAB V)
BAB 5.pdf - Published Version
Restricted to Repository staff only
Download (809kB) | Request a copy

Abstract

An experimental research method was employed. AISI 1040 steel specimens were heated to an austenitizing temperature of 850°C with a holding time of 30 minutes, then cooled using brine and seawater as quenching media. Subsequently, hardness testing (Rockwell C method), Charpy impact testing, and microstructural analysis using an optical microscope were conducted. The test data were analyzed descriptively and comparatively to determine the effect of each quenching medium on changes in material properties. The results indicate that brine produced a higher cooling rate than seawater, thereby leading to a more significant increase in the hardness of the AISI 1040 steel. The resulting microstructure was dominated by martensite—which was more abundant and finer—in specimens quenched in brine, whereas specimens quenched in seawater exhibited a mixture of martensite and bainite with a lower martensite fraction. Conversely, specimens quenched in seawater demonstrated superior toughness compared to those quenched in brine. Thus, the choice of quenching medium significantly influences the mechanical properties and microstructure of AISI 1040 steel following the hardening process. Keywords: AISI 1040 steel, Hardening, Quenching, Brine, Seawater, Hardness, Microstructure.

Item Type: Thesis (S-1)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Fakultas Teknik > S1 Teknik Mesin
Depositing User: Tn RANDY BANGSAWAN
Date Deposited: 11 Aug 2026 01:29
Last Modified: 11 Aug 2026 01:29
URI: http://repository.univ-tridinanti.ac.id/id/eprint/11141

Actions (login required)

View Item View Item
repository eprints is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.