Influence of Tempering Time on the Microstructure, Hardness and Impact Toughness of Ductile Cast Iron

DOI

10.2991/978-94-6463-134-0_10How to use a DOI?

Keywords

Tempering; Microstructure; Cast Iron

Abstract

This study aims to obtain a suitable tempering time for ductile cast iron on microstructure, hardness, and toughness. The investigated ductile cast iron Y-block contains a carbon content of 3.45 wt%, silicon 2.6 wt%, manganese 0.635 wt.%, chromium 0.275 wt.%, nickel 1.58 wt.%, molybdenum 0.177 wt.%, and magnesium 0.1 wt% with a hardness of 41.5 HRC in the as-cast condition. In this experiment, the heat treatment was carried out with heating at 850 ℃ and holding time for 1 h. Then it was quenched with oil-cooling media and followed by a tempering process. Tempering at 350 ℃ was conducted with differences in holding times, 1 h, 2 h, and 3 h, respectively. The results show that a tempering with a holding time of 1 h had a hardness of 52.83 HRC and an impact energy of 1.90 J. Tempering with a hold time of 2 h had a hardness of 50 HRC and an impact energy of 2.28 J. And tempering for 3 h had a hardness of 46.3 HRC and impact energy of 2.80 J. From these results, it can be concluded that tempering time influences the mechanical properties of ductile cast iron. The longer the tempering time, the lower the hardness value and the higher the toughness. It can be attributed to fragmented carbides and graphite nodule evolution during heat treatment.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Herry Oktadinata
AU  - Sri Mulyati Latifah
AU  - Sastrawan Sastrawan
PY  - 2023
DA  - 2023/04/19
TI  - Influence of Tempering Time on the Microstructure, Hardness and Impact Toughness of Ductile Cast Iron
BT  - Proceedings of the 6th Mechanical Engineering, Science and Technology International conference (MEST 2022)
PB  - Atlantis Press
SP  - 99
EP  - 106
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-134-0_10
DO  - 10.2991/978-94-6463-134-0_10
ID  - Oktadinata2023
ER  -