@thesis{thesis,
		author={Bagus Ilham  Pramudya},
		title ={PENGARUH TEMPERATUR DAN MEDIA PENDINGIN PADA 
PROSES HEAT TREATMENT TERHADAP SIFAT MEKANIS 
BAJA S45C UNTUK APLIKASI MATA POTONG 
PENCACAH PLASTIK},
		year={2022},
		url={http://repository.polman-babel.ac.id/id/eprint/621/},
		abstract={Plastic chopper blade or knife is a part that is used as a tool to cut waste plastic 
into small parts to be processed to the recycling stage. JIS S45C steel is used as an 
alternative material to replace plastic chopper blades. Researchers will vary the 
hardening temperature, namely 800°C, 840°C, 880°C with cooling media using salt 
water, oil, and sea water. then proceed with the tempering process at a temperature 
of 500°C. The mechanical properties in this research are hardness testing and 
toughness testing which aims to find the highest value to achieve cutting edge 
hardness. From the test results on the hardening process with salt water media 
which has the highest hardness at a temperature of 840°C of 50.56 HRC and a 
temperature of 880°C of 55.3 HRC. Then after being tempered at a temperature of 
500°C, the hardness decreased with a value of 34.01 HRC at a temperature of 
840°C with a toughness value of 0.5828 J/mm2 and 36.86 HRC at a temperature of 
880°C with a toughness value of 0.3922 J/mm2
 it can be concluded that in order to 
achieve a reference to the hardness value of the cutting edge of 46.9 HRC in salt 
water media with a hardening process it has been achieved it's just that the steel is 
brittle, whereas after tempering, the hardness value has not been reached. 
Keywords: Hardness, Knife, Toughness, S45C}
		}