Somani, M., Porter, D., Karjalainen, L., Kantanen, P., Kömi, J. & Misra, D. (2019). Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning. International Journal of Materials Research, 110(3), 183-193. https://doi.org/10.3139/146.111744
Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning
|Author:||Somani, Mahesh C.1; Porter, David A.1; Karjalainen, Pentti1;|
1University of Oulu, Faculty of Technology, Centre for Advanced Steels Research, Oulu, Finland
2University of Texas at El Paso, Dept. of Metallurgical, Materials and Biomedical Engineering, El Paso, TX, USA
|Online Access:||PDF Full Text (PDF, 0.4 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023030730386
|Publish Date:|| 2023-03-07
In the direct quenching and partitioning (DQ&P) process,tough ultra-high-strength steel is made by combining thermomechanical processing with quenching and partitioning to obtain martensite toughened by thin films of retained austenite. The hot rolling stage with deformation and recrystallization between the rolling passes affects the state of the austenite before quenching and partitioning. This paper describes the static recrystallization kinetics of two steels with compositions suited to DQ&P processing, viz. (in wt.%) 0.3C-1Si-2Mn-1Cr and 0.25C-1.5Si-3Mn. The stress relaxation technique on a Gleeble thermomechanical simulator provided recrystallization times over a wide range of temperature, strain, strain rate and initial grain size. The higher levels of Si and Mn made the recrystallization kinetics less sensitive to strain, strain rate and temperature. The equations derived to describe the recrystallization kinetics can be used in the design of the rough rolling part of thermomechanical processing.
International journal of materials research
|Pages:||183 - 193|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
The funding of this research activity through the RFCS Grant Agreement RFSR-CT-2014-00019 is gratefully acknowledged.
© 2019, Carl Hanser Verlag, München. This work is licensed under the Creative Commons Attribution 4.0 International License.