低碳钢中第2相NbC<sub>x</sub>N<sub>1-x</sub>的x值

低碳钢中第2相NbC_xN_1-x的x值

摘要: 采用现有计算方法,对低碳钢中铌的碳氮化物NbC_xN_1-x中的x值进行了理论计算.计算结果表明,NbC_xN_1-x中的x值主要受成分和温度的影响,随钢中C含量增大、N含量减小而增大,随温度的升高而减小之.通过与相关实验结果比较发现:在一定的成分、温度范围内计算结果与之符合良好;对于超出该范围的Nb微合金化低碳钢,计算结果可作参考.给出了温度和范围成分分别为1050～1250℃和0.10%C-0.005%N-0.20%Nb～0.20%C-0.005%N-0.20%Nb.

Abstract: For NbC_xN_1-x in low-carbon microalloyed steels,x values in the formula are calculated by existing methods.As shown in the calculation results,the x values are mainly influenced by temperature and composition.The x values increase with increasing C content and decreasing N content,as well as decreasing temperature.It is indicated that in a certain range of composition and temperature,the calculation results is in good agreement with experimental data from related references.On the other hand,for the steel with composition over the range,the calculation results should be treated as a reference only.The ranges of temperature and composition are 1050 to 1250℃ and 0.10%C-0.005%N-0.20%Nb to 0.20%C-0.005%N-0.20%Nb,respectively.