过共析帘线钢中碳氮化钛夹杂的析出与固溶

发布时间：2018-07-15 13:50

【摘要】：应用热力学方法研究了帘线钢凝固析出碳氮化钛(Ti(CxN1-x))夹杂的性质,以及钢坯加热过程碳氮化钛(Ti(CxN1-x))夹杂分解固溶的热力学条件,并通过实验研究了试样高温加热过程中碳氮化钛夹杂的固溶现象。研究表明:1)帘线钢C含量越高,凝固析出的碳氮化钛夹杂中的x值越高;2)帘线钢C含量越高,凝固过程碳氮化钛夹杂析出就越早,析出碳氮化钛夹杂时的凝固前沿温度越低;3)82A铸坯加热到1 087℃以上时,碳氮化钛夹杂具备分解和固溶的热力学条件;4)实验验证将钢样在1 150℃和1 250℃高温加热后,5μm以上的碳氮化钛夹杂分别下降了55%和70.3%,而试样在1 250℃高温加热后缓冷到1 000℃时发现2μm以下的小夹杂继续在分解,而5μm以上的大夹杂在增加。
[Abstract]:The properties of Ti (C _ XN _ (1-x) inclusion precipitated by solidification of cord steel and the thermodynamic conditions for the decomposition and solution of Ti (C _ XN _ (1-x) inclusions during billet heating were studied by means of thermodynamic method. The solid solution phenomenon of carbon-nitride inclusion during high temperature heating was studied by experiments. The study shows that the higher the C content of 1) cord steel, the higher the x value of titanium carbide inclusion precipitated during solidification, the higher the C content of C content in the steel), and the earlier the carbon and nitride inclusions are precipitated during solidification. The lower the solidification front temperature of titanium carbonitride inclusion is, the lower the solidification front temperature is when 82A billet is heated to more than 1087 鈩，

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