Model of Calculating Activity of Nitrogen and Vanadium in Fe-C-V-N Molten Metal

作     者：PENG Jun WANG Shi-jun DONG Yuan-chi LIU Li-xia ZHOU Yun CHEN Er-bao 

作者机构：School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 Beijing China School of Metallurgy and Resource Anhui University of Technology Ma＇anshan 243002 Anhui China 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2008年第15卷第5期

页      面：19-23页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学] 

基　　金：National Natural Science Foundation of China and Baosteel Group Co of Shanghai (50674001) 

主　　题：metal melt coexistence theory action concentration activity 

摘      要：The solubility of nitrogen in the Fe-C-V-N system was measured at 1 708 K and the model of calculating activity （action concentration） of nitrogen （N） and vanadium （V） was derived according to the phase diagram and the coexistence theory of the metal melt structure. The solubility expression of nitrogen in the Fe-C-V-N system at 1 708 K was ωN =0. 058 194-0. 010 367ωc＋0. 005 543 4ωv. Comparing the computing results with the experimental resuits, a satisfactory conclusion could be obtained. The analysis of the Fe-C-V-N system using this model showed that VN was present in a high temperature metal melt, which would reduce the action concentration of nitrogen obviously. It was consequently disadvantageous to the removal of nitrogen from hot metal.