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

钢铁研究学报(英文版), 2009, 16(3): 15-19.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China

2.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

3.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

4.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

5.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

6.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

基金项目: 国家自然科学基金(50674001)

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

WANG Shi-jun ^1, , PENG Jun ^2, , DONG Yuan-chi ^3, , LIU Li-xia ^4, , ZHOU Yun ^5, , CHEN Er-bao ^6,

2.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

3.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

4.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

5.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

6.School of Metallurgy and Resource,Anhui University of Technology,Ma'anahan 243002,Anhui,China

Keywords： molten metal

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.

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

参考文献