Influence of Vanadium Microalloying on Isothermal Transformation Behavior of Eutectoid Steel
- Authors: Zhen C.1,2, Xin-ping M.1,2, Si-qian B.1,3, Gang Z.1,3, Xiao H.1,3
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Affiliations:
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology
- Wuhan Branch of Baosteel Central Research Institute
- Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology
- Issue: Vol 120, No 10 (2019)
- Pages: 936-942
- Section: Structure, Phase Transformations, and Diffusion
- URL: https://journals.rcsi.science/0031-918X/article/view/168734
- DOI: https://doi.org/10.1134/S0031918X19100120
- ID: 168734
Cite item
Abstract
Abstract—The influence of vanadium as a microalloying element on the austenite decomposition behaviors and microstructure transformation of eutectoid steel were studied during isothermal cooling. Vanadium dissolved in γ matrix exhibited a negative effect on austenite decomposition to pearlite microstructure and led to a decrease in the lamellar spacing. Moreover, the results indicated that the dissolved vanadium segregated toward austenite grain boundaries and suppressed the formation of grain boundary ferrite. However, the precipitation of vanadium during the isothermal process led to a decrease in vanadium dissolved in matrix that indirectly promoted transformation to pearlite. The precipitates could act as nucleus for pearlite formation, which also accelerated the transformation. The lamellar spacing of pearlite increased as a result of carbon consumption of precipitates. The addition of nitrogen remarkably accelerated the transformation, because the chemical driving force for VN formation was significantly larger.
About the authors
Cai Zhen
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology; Wuhan Branch of Baosteel Central Research Institute
Email: caizhen198804@126.com
China, Wuhan, Hubei, 430081; Wuhan, 430080
Mao Xin-ping
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology; Wuhan Branch of Baosteel Central Research Institute
Email: caizhen198804@126.com
China, Wuhan, Hubei, 430081; Wuhan, 430080
Bao Si-qian
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology
Author for correspondence.
Email: caizhen198804@126.com
China, Wuhan, Hubei, 430081; Wuhan, 430081
Zhao Gang
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology
Email: caizhen198804@126.com
China, Wuhan, Hubei, 430081; Wuhan, 430081
Hu Xiao
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology
Email: caizhen198804@126.com
China, Wuhan, Hubei, 430081; Wuhan, 430081