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The properties of titanium carbonitride Ti(C_xN_(1-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(C_xN_(1-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 xin the Ti(C_xN_(1-x))inclusions is;(2)the higher the content of carbon in the tire cord steel is,the earlier the Ti(C_xN_(1-x))inclusions precipitated during the solidification process and the lower the solidification front temperature is during precipitation;(3)when an 82 Asteel sample was heated to 1 087℃,the Ti(C_xN_(1-x))inclusions possess the thermodynamic conditions of decomposition and solid solution;and(4)when 82 Asamples were heated to 1 150 and 1 250 ℃,the total number of Ti(C_xN_(1-x))inclusions larger than 5 μm in diameter decreased by55.0% and 70.3%,respectively.In addition,although smaller inclusions with diameter less than 2 μm continued to decompose when the sample was heated at 1 250℃for 2 hand then cooled to 1 000℃in the furnace,the number of inclusions larger than 5 μm in diameter increased.
The properties of titanium carbonitride Ti (C_xN_ (1-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 (C_xN_ ( 1-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 xin the Ti (C_xN_ (1- (2) the higher the content of carbon in the tire cord steel is, the earlier the Ti (C_xN_ (1-x)) inclusions is precipitated during the solidification process and the lower the solidification front temperature is during precipitation (3) when an As 82 sample was heated to 1 087 ° C, the Ti (C_xN_ (1-x)) inclusions possess the thermodynamic conditions of decomposition and solid solution; and (4) when 82 As samples were heated to 1 150 and 1 250 ° C, the total number of Ti (C_xN_ (1-x)) incl usions 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 1 250 ° C for 2 hand then cooled to 1 000 ℃ in the furnace, the number of inclusions larger than 5 μm in diameter increased.