Effect Of Cooling Medium And Tempering On Microstructures And Hardness Of SK3 High Carbon Steel

Jumaidin, Ridhwan and Abdullah, Muhammad Ilman Hakimi Chua and Jopri, Iffa Marina and Hussin, Mohamed Saiful Firdaus and Hasan, Rafidah and Saleman, Abdul Rafeq and Idral, Febrian and Aziz, Alia Ruzana (2019) Effect Of Cooling Medium And Tempering On Microstructures And Hardness Of SK3 High Carbon Steel. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 63 (2). pp. 199-209. ISSN 2289-7879

Text EFFECT OF COOLING MEDIUM AND TEMPERING ON MICROSTRUCTURES AND HARDNESS OF SK3 HIGH CARBON STEEL.PDF Download (1MB)

Abstract

This paper presents a study on the effect of heat treatments i. e annealing, quenching, normalizing, and tempering on the characteristics of SK3 high carbon steel. The specimens were heated to austenitizing temperatures at 760C, 840C, 920C, 1000C and 1080°C, before cooled by using different cooling medium i.e. oil quenching, air cooling, and furnace cooling. Tempering process was conducted on the quenched specimen by reheating at 500°C and cooled to room temperature. Material characterization techniques such as hardness test and morphological investigation were carried out for all specimens. The heat treatment has significantly improved the hardness of the material. The quenched specimen (rapid cooling) shows the highest increment of hardness by 709%. This was followed by the normalized specimen (moderate cooling) and annealed specimen (slow cooling) which shows 425% and 170% of increment respectively. However, tempering treatment on the quenched specimen has shown a slight decrease in the hardness value. In terms of microstructure, the annealed specimen produced coarse grain size while the quenched specimen produced a fine grain size. The hardness of the specimen subjected to tempering process is lower than that of quenching process.

Item Type:	Article
Uncontrolled Keywords:	Annealing, Heat treatment, High carbon steel, Quenching, Tempering, Microstructures , Carbon Steel
Divisions:	Faculty of Mechanical and Manufacturing Engineering Technology
Depositing User:	Sabariah Ismail
Date Deposited:	04 Aug 2020 10:36
Last Modified:	04 Aug 2020 10:36
URI:	http://eprints.utem.edu.my/id/eprint/24270
Statistic Details:	View Download Statistic

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