Effects of Spheroidized Microstructure on Bainite Nucleation in SAE 52100 Steel

DOI

10.2991/icmmcce-17.2017.206How to use a DOI?

Keywords

52100 steel; bainite ferrite; nucleation; cementite unit volume density; kinetics

Abstract

Annealed SAE 52100 steel samples with different spheroidized microstructures were austempered to produce a bainitic+martensitic duplex microstructure. The effects of the spheroidized microstructure on bainite ferrite (BF) nucleation during austempering were discussed. Results show that the proportion of lower bainite increased, and the BF plates initially widened and subsequently narrowed in the duplex microstructure with an increase in the unit volume density of the cementite particles ( v) in the spheroidized microstructure. An improved model was suggested to predict the bainite transformation including consummated b by considering the effects of v on BF nucleation. The model was validated with the experimental data of SAE 52100 steel.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - HongBo Yang
AU  - PeiWen Yao
AU  - Lei Yang
AU  - MingZeng Shao
PY  - 2017/09
DA  - 2017/09
TI  - Effects of Spheroidized Microstructure on Bainite Nucleation in SAE 52100 Steel
BT  - Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 2017)
PB  - Atlantis Press
SP  - 1161
EP  - 1166
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmcce-17.2017.206
DO  - 10.2991/icmmcce-17.2017.206
ID  - Yang2017/09
ER  -