Thermodynamic analysis of precipitation behavior of Ti-bearing inclusions in SWRH 92A tire cord steel

Lu Wang; Zheng-Liang Xue; Hang-Yu Zhu; Jia-Liu Lei

Results in Physics (Sep 2019)

Thermodynamic analysis of precipitation behavior of Ti-bearing inclusions in SWRH 92A tire cord steel

Lu Wang,
Zheng-Liang Xue,
Hang-Yu Zhu,
Jia-Liu Lei

Affiliations

Lu Wang: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Hubei Provincial Engineering Technology Research Center of Metallurgical Secondary Resources, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Zheng-Liang Xue: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Hubei Provincial Engineering Technology Research Center of Metallurgical Secondary Resources, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Corresponding authors at: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China.
Hang-Yu Zhu: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Corresponding authors at: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China.
Jia-Liu Lei: Metallurgy Engineering Department, School of Materials Science and Engineering, Hubei Polytechnic University, Huangshi 435003, Hubei, China

Journal volume & issue: Vol. 14

Abstract

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The thermodynamics of the precipitation behaviors of Ti-bearing inclusions (TiC, TiN, and TiCxN1−x) in SWRH 92A tire cord steel were analyzed. It was found that all three types of inclusions could not precipitate in the liquid-phase zone due to their low solubility products. However, calculated results showed that TiN and TiCxN1−x can precipitate in the mushy zone at the very late stage during the solidification process (solid fraction exceeding 0.98). The precipitation time of TiCxN1−x was a little earlier than that of TiN. The value of x (the molar ratio of TiC in TiCxN1−x) varied with different cooling rates and fell in the range of 0.1987–0.2152 under the calculated conditions. In addition, it was found that TiC can only precipitate in the solid phase (γ-Fe) at a starting temperature of 1241 K. The precipitation sequence of TiCxN1−x → TiN → TiC was determined. The results of this work may play an important role in understanding the precipitation behaviors of Ti-bearing inclusions in SWRH 92A tire cord steel. Keywords: Thermodynamics, Precipitation, Ti-bearing inclusion, Tire cord steel, SWRH 92A

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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