Abstract
The properties of titanium carbonitride Ti(CxN1−x) inclusions precipitated during solidification of tire cord steels and the thermodynamic conditions for their decomposition and solid solution during billet heating were investigated using a thermodynamics method. The solid solution of Ti(CxN1−x) inclusions during high-temperature heating was also studied experimentally. The results revealed that: (1) the higher the content of carbon in the tire cord steel is, the greater the value of x in the Ti(CxN1−x) inclusions is; (2) the higher the content of carbon in the tire cord steel is, the earlier the Ti(CxN1−x) inclusions precipitated during the solidification process and the lower the solidification front temperature is during precipitation; (3) when an 82A steel sample was heated to 1087 °C, the Ti(CxN1−x) inclusions possess the thermodynamic conditions of decomposition and solid solution; and (4) when 82A samples were heated to 1150 and 1250 °C, the total number of Ti(CxN1−x) inclusions larger than 5 μm in diameter decreased by 55.0% and 70.3%, respectively. In addition, although smaller inclusions with diameter less than 2 μm continued to decompose when the sample was heated at 1250 °C for 2 h and then cooled to 1000 °C in the furnace, the number of inclusions larger than 5 μm in diameter increased.
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Foundation Item: Item Sponsored by Science Research Plan of Wuhan Science and Technology Bureau of China (201210321098)
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Yu, Cf., Xue, Zl. & Jin, Wt. Precipitation and solid solution of titanium carbonitride inclusions in hypereutectoid tire cord steel. J. Iron Steel Res. Int. 23, 338–343 (2016). https://doi.org/10.1016/S1006-706X(16)30054-1
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DOI: https://doi.org/10.1016/S1006-706X(16)30054-1