Thermodynamic Model for Calculating Activity of Nitrogen and Boron in Fe-C-B-N Molten Metal

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

作者机构：School of Metallurgy and Resource Anhui University of Technology Maranshan 243002 Anhui China School ofMetallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China 

出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)

年 卷 期：2009年第16卷第3期

页      面：15-19页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：Sponsored by National Natural Science Foundation of China and Baosteel (50674001) 

主　　题：molten metal coexistence theory action concentration activity 

摘      要：The solubility of nitrogen in Fe-C-B-N system was measured at 1 758 K,and the computational model on activity （action concentration） of nitrogen and boron was established based on phase diagram and the coexistence theory about metal melt structure model. Comparing the computed results with the experimental results,satisfactory conclusion can be obtained. The result shows that BN and B4C can exist in Fe-C-B-N molten metal at high temperature,which consequently restrains the nitrogen removal from the melt. However,B4C content is extremely low. Before graphite is precipitated,the influence of carbon on activity of nitrogen in melt is higher in ternary system than in binary system; however,this effect is contrary to that after graphite is precipitated.