Precipitation and Solid Solution of Titanium Carbonitride Inclusions in Hypereutectoid Tire Cord Steel

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• 作者：Chen-fan YU ^{yuchenfan0808@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Zheng-liang XUE ; ^{xuezhengliang@wust.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Wu-tao JIN
• 关键词：hypereutectoid tire cord steel ; titanium carbonitride inclusion ; precipitation ; solidification ; solid solution ; billet heating
• 刊名：Journal of Iron and Steel Research, International
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：23
• 期：4
• 页码：338-343
• 全文大小：735 K

文摘

The properties of titanium carbonitride Ti(C_x N_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_x N_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 x in 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 82A steel sample was heated to 1087 °C, the Ti(C_xN_1–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(C_xN_1–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.