%A 1517041107 Agus Supriadi
%T ANALISIS PENGARUH KONSENTRASI LARUTAN AIR GARAM (NaCl)
PADA SAAT PROSES QUENCHING TERHADAP STRUKTUR MIKRO
DAN KEKERASAN BAJA KARBON ST 37 ( C = 0, 303 %)
%X Telah dilakukan penelitian terkait analisis pengaruh konsentrasi larutan air garam
(NaCl) pada saat proses quenching terhadap kekerasan dan struktur mikro pada baja
karbon ST 37 (C = 0,303 %). Penelitian ini dilakukan dengan metode hardening
dengan pemanasan awal Pre-heating pada suhu 600 oC selama 30 menit dan
austenisasi pada suhu 850 oC selama 25 menit. Selanjutnya sampel di quenching pada
media larutan garam 0%, 5%, 10%, dan 15%. Dengan pengujian menggunakan
metode Spark-OES diketahui bahawa sampel memiliki konsentrasi unsure karbon
sebesar 0,303%. Pada penelitian yang dilakukan diketahuikon sentrasi larutan garam
berpengaruh 71,73% terhadap kekerasan dan 45,03% terhadap ketangguhan baja
karbon menengah. Selain itu proses hardening yang diakukan mengakibatkan
transformasi fasa dari ferrit (?) dan perlit menjadi martensit.

Kata kunci: Hardening, pre-heating, quenching, ferrit, martensit
Research has been carried out related to the analysis of the effect of the concentration
salt solution (NaCl) during the quenching on hardness and microstructure of ST 37 (C
= 0, 303 %) carbon steel. This research was conducted by using the hardening method
with pre-heating at 600 oC for 30 minutes and austenizing at 850oC for 25 minutes.
Furthermore, the samples were quenched in salt solution media of 0%, 5%, 10%, and
15%. By testing using the Spark-OES method, it is known that the sample has a
carbon element concentration of 0.303%. In the research, it was found that the
concentration of salt solution had an effect of 71.73% to the hardness and 45,03% to
the toughness of medium carbon steel. In addition, the hardening process resultes in a
phase transformation from ferrite (?) and pearlite to martensite.

Keyword: Hardening, pre-heating, quenching, ferrit, martensite
%C UNIVERSITAS LAMPUNG
%D 2021
%I FAKULTAS MATEMATIKA ILMU PENGETAHUAN ALAM
%L eprints60098