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Media Nofri
Teknik Mesin Institut Sains dan Teknologi Nasional, Jakarta
Electrical & Electronics Engineering Engineering

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PERUBAHAN SIFAT MEKANIK BAJA KONSTRUKSI JIS G4051 S17C SETELAH DILAKUKAN HARDENING DAN TEMPERING Media Nofri
Bina Teknika Vol 11, No 2 (2015): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1029.661 KB) | DOI: 10.54378/bt.v11i2.107

Abstract

Material JIS G 4051 S 17 C including low carbon steel with alloy composition 0:15% C, 0.157% Si, 1.2% Mn, 0.01% P, of 0.02% S. Low carbon steels are widely applied for construction machinery. This study aimed to analyze the effects of the process of hardening and tempering on material hardness, impack and metallografi. Results of this research show the value of Brinell hardness will increase the hardening process with temperatures of 900 C, holding time 15 minutes and the coolant medium is water. Brinell hardness is HB 364.22, is due to the structure of ferrite and pearlite transformed to martensite. Impack results increased in the process of tempering with temperature 500 C, holding time 15 minutes are cooled with air. Impack toughness value of 0.447 Joule / mm2, is because the value of tenacity to grow up and hardness decreased in the coarse grain structure.
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