Studi Peningkatan Kekerasan Pada Permukaan Baja Karbon Menggunakan Metode Flame Hardening Dengan Variasi Temperatur Pemanasan 770°C, 870°C, Dan 970°C.

Rosidi, Muhammad Ali and , Patna Partono, S.T., M.T. (2024) Studi Peningkatan Kekerasan Pada Permukaan Baja Karbon Menggunakan Metode Flame Hardening Dengan Variasi Temperatur Pemanasan 770°C, 870°C, Dan 970°C. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Low-carbon steels generally contain less than about 0.25% of weight C. Heat treatment can be defined as a combination of hardening and cooling operations against a metal or its alloy in a solid state in a given time. The goal is to get a component with a hard surface but the inside remains sticky. The method of heat treatment and the practical surface treatment can be done using Flame hardening. Flame hardening or hardening with open flame is hardening performed by hardening the work object on the flame. The flame can use Gas + Air or Acetyline + O2. The aim of this study was to find out the influence of temperature variations of flame hardening on surface hardness and microstructure on low-carbon steel iron materials. With temperature variations of 770 °C, 870°C, and 970 ° C on each tested specimen then quenching with water cooling medium by submerging. Strength tests were performed using the rockwell method, while metallographic tests used optical microscopes. Observations of microstructure showed that each specimen obtained smaller ferrite particle sizes on the edge compared to the middle, and larger pearlitee particle dimensions on the sides than on the center, so that the strength was higher on the side than in the middle. It can also be proven from the rockwell violent test results. Next, the data obtained from the Rockwell hardness test (HRB) varies greatly. For untreated steel, the average hardness is 88.9 HRB, followed by 77.58 HRB at 770°C, 77.64 870 HRB and 79.16 HRB. The optimal hardness of steel E is 970 °C, while the lowest is found in steel under annealing.

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Baja karbon rendah, Flame hardening, Quenching, Struktur mikro, Kekerasan
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	MUHAMMAD ALI ROSIDI
Date Deposited:	19 Aug 2024 05:33
Last Modified:	19 Aug 2024 05:33
URI:	http://eprints.ums.ac.id/id/eprint/127025

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