The Influence of Rare Earth Elements on Phase Transformation in 25Mn Steel During Continuous Heating

The influence of rare earth elements on continuous heating transformation of 25Mn steel was investigated by using differential scanning calorimetry combined with microstructure analysis. The transformation kinetics were obtained from experiment results and the Kissinger equation. It was found that t...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2018-11, Vol.49 (11), p.5271-5276
Main Authors: Yan, Honghong, Hu, Yong, Zhao, Dawen
Format: Article
Language:English
Subjects:
Austenite
Characterization and Evaluation of Materials
Chemistry and Materials Science
Differential scanning calorimetry
Ferrosilicon
Heating
Impact strength
Materials Science
Metallic Materials
Microstructure
Nanotechnology
Phase transitions
Rare earth elements
Structural Materials
Surfaces and Interfaces
Thin Films
Trace elements
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Summary:The influence of rare earth elements on continuous heating transformation of 25Mn steel was investigated by using differential scanning calorimetry combined with microstructure analysis. The transformation kinetics were obtained from experiment results and the Kissinger equation. It was found that the addition of 0.3 pct (mass fraction) rare earth ferrosilicon alloy resulted in an increase in the values of austenite onset temperature (Ac 1 ) and austenite finish temperature (Ac 3 ), and the phase transformation activation energy increased by 149 kJ/mol. At the same time, for the modified 25Mn steel, the microstructure and the impact toughness were improved.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-018-4891-x