EFFECT OF QUENCHING AND TEMPERING ON MICRO STRUCTURE AND MECHANICAL PROPERTIES IN LATERITE STEEL

Published 30 Nov 2019 •  vol 132  • 


Authors:

 

Desiran Sembiring, Faculty of Mechanical Engineering Program of Technology University of Malaysia
Djoko Setyo Widodo, Faculty of Mechanical Engineering Program Technology University of Malaysia and Lecture at Universitas Krinadwipayana Jakarta, Indonesia
Bintang Adjiantoro, Metallurgical Research Center LIPI, Serpong PUSPIPTEK Complex

Abstract:

 

The need for high armor material has an impact on the use of laterite steel as an armor material. Therefore the increase of the mechanical properties in laterite steel needs to be done. One way to improve mechanical properties in steel is through quenching and tempering. The variables used in this study are variations in cooling media (water, oil, and air) and tempering temperatures (0°C, 100°C, and 200°C). This study used the experimental method using metallographic observations under optical microscopy, hardness value using Rockwell hardness method, tensile strength values using tensile testing machines and standard ASTM E8, as well as impact resistance values using the Charpy type impact testing machine and ASTM E23 standard.
The results showed that specimens from quenching with medium water at a tempering temperature of 100°C had the highest average hardness and tensile strength. This is due to the relatively high content of martensite. The highest impact resistance is owned by specimens from quenching oil followed by tempering at 100°C. In some specimens, there was a secondary hardening event or an increase in hardness after the tempering process and tempered martensite embrittlement event namely the impact resistance value which actually decreased after going through the tempering process.

Keywords:

 

quenching, tempering, microstructure, mechanical properties, laterite steel

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Citations:

 

APA:
Sembiring, D., Widodo, D. S., & Adjiantoro, B. (2019). Effect of Quenching and Tempering on Micro Structure and Mechanical Properties in Laterite Steel. International Journal of Advanced Science and Technology (IJAST), ISSN: 2005-4238(Print); 2207-6360 (Online), NADIA, 132, 35-46. doi: 10.33832/ijast.2019.132.05.

MLA:
Sembiring, Desiran, et al. “Effect of Quenching and Tempering on Micro Structure and Mechanical Properties in Laterite Steel.” International Journal of Advanced Science and Technology, ISSN: 2005-4238(Print); 2207-6360 (Online), NADIA, vol. 132, 2019, pp. 35-46. IJAST, http://article.nadiapub.com/IJAST/Vol132/5.html.

IEEE:
[1] D. Sembiring, D. S. Widodo, and B. Adjiantoro, “Effect of Quenching and Tempering on Micro Structure and Mechanical Properties in Laterite Steel.” International Journal of Advanced Science and Technology (IJAST), ISSN: 2005-4238(Print); 2207-6360 (Online), NADIA, vol. 132, pp. 35-46, Nov 2019.