ժҪ 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 ��, 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 ��, the total number of Ti(CxN1-x) inclusions larger than 5 ��m in diameter decreased by 55. 0% and 70. 3%, respectively. In addition, although smaller inclusions with diameter less than 2 ��m continued to decompose when the sample was heated at 1250 �� for 2 h and then cooled to 1000 �� in the furnace, the number of inclusions larger than 5 ��m in diameter increased.
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 ��, 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 ��, the total number of Ti(CxN1-x) inclusions larger than 5 ��m in diameter decreased by 55. 0% and 70. 3%, respectively. In addition, although smaller inclusions with diameter less than 2 ��m continued to decompose when the sample was heated at 1250 �� for 2 h and then cooled to 1000 �� in the furnace, the number of inclusions larger than 5 ��m in diameter increased.
��������:The evolution and control ofTitanium inclusion in high strength tire cord steel
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E-mail: xuezhengliang@wust.edu.cn
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Chen- fan YU,Zheng- liang XUE,Wu- tao JIN. Precipitation and Solid Solution of Titanium Carbonitride Inclusions in Hypereutectoid Tire Cord Steel[J]. �й������ڿ���, 2016, 23(4): 338-343.
Chen- fan YU,Zheng- liang XUE,Wu- tao JIN. Precipitation and Solid Solution of Titanium Carbonitride Inclusions in Hypereutectoid Tire Cord Steel. Chinese Journal of Iron and Steel, 2016, 23(4): 338-343.
2016, Vol. 23 
