Prediction of the austenite-grain size of microalloyed steels based on the simulation of the evolution of carbonitride precipitates

Kinetic calculations of the evolution of carbonitride precipitates in low-alloy steels with Nb and Ti have been performed for different temperatures of austenitizing. Based on the data of the kinetic simulation of the ensembles of carbonitride precipitates, the expected size of the austenite grain h...

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Bibliographic Details
Published in:Physics of metals and metallography 2015-11, Vol.116 (11), p.1127-1134
Main Authors: Gorbachev, I. I., Pasynkov, A. Yu, Popov, V. V.
Format: Article
Language:English
Subjects:
Allowances
Alloys
Analysis
Carbonitrides
Chemistry and Materials Science
Diffusion
Evolution
High strength low alloy steels
Materials Science
Mathematical models
Metallic Materials
Phase Transformations
Precipitates
Precipitation
Simulation
Structure
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Summary:Kinetic calculations of the evolution of carbonitride precipitates in low-alloy steels with Nb and Ti have been performed for different temperatures of austenitizing. Based on the data of the kinetic simulation of the ensembles of carbonitride precipitates, the expected size of the austenite grain has been calculated using different models. The results obtained have been compared with experimental data. It has been shown that the best agreement with the experiment is achieved for the high-temperature region (1150–1250°C) when using the Gladman model (with the parameter Z = 2) with allowance for the polydispersity of the ensemble of precipitates.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X1511006X