| Summary: | 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
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