Pengaruh Flame Hardening Terhadap Kekerasan Permukaan Dengan Metode Pengujian Brinell Dan Struktur Mikro Besi Cor Nodular

Tobiin, Rizkina and , Ir. Agung Setyo Darmawan, M.T (2022) Pengaruh Flame Hardening Terhadap Kekerasan Permukaan Dengan Metode Pengujian Brinell Dan Struktur Mikro Besi Cor Nodular. Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Surface hardening in metals is one way to increase the hardness of the surface only. Metals that experience hardening of the surface will have hard properties on the surface, while in the middle / core of the metal will remain tough. The goal of the study was to determine the effect of flame hardening on surface hardness and microstructure on nodular cast iron material. In this study, the process of flame hardening was carried out, namely by heating nodular cast iron material to reach a temperature of about 850 °C using a type of carbursed flame from a mixture of oxygen and acetylene gas. Then quenching with a water cooling medium sprayed on the heated surface. Hardness testing is done by the brinell method, while metallographic testing uses optical microscopy and scanning electron microscopy (SEM). Results from metallographic testing can be known on the surface of the specimen that is affected by flame hardening dominated by martensite and perlite phases, then in the transition area there is a graphite phase in the form of clumps and rough perlite. Phase on areas that are not exposed to flame hardening consists of graphite that tends to be round in shape surrounded by ferrites and has a perlite matrix. In hardness testing, there can be an increase hardness in surface areas affected by flame hardening by 157 % of the hardness of the base metal. The average hardness in the parent metal was 263,26 BHN, while the average hardness in flame hardening-affected areas was 677,40 BHN.

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Nodular cast iron, flame hardening, hardness, microstructure
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	RIZKINA TOBIIN
Date Deposited:	15 Feb 2022 02:53
Last Modified:	15 Feb 2022 02:53
URI:	http://eprints.ums.ac.id/id/eprint/97235

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