碳热还原法制备氮化钒铁合金的性能表征研究

Characterization of Vanadium Ferronitride Alloys Prepared by Carbon Thermal Reduction

采用试验测试的手段对碳热还原法制备氮化钒铁合金的性能进行表征,分析氮化温度等参数对N/V比例和产品氮化率的影响。研究结果表明:随配碳系数增大,N/V先增大后降低;随碳化温度上升,N/V不断增大;随氮化温度上升,N/V先增大后下降。当氮化温度增加后,氮化率为先上升后下降,最优氮化温度为1450℃;当氮化时间增加,氮化率逐渐上升并到达稳定,最优氮化时间为15 h。氮化钒铁的物相类型包括Fe相、NV相与少量的OV相。Fe在氮化钒铁内形成了不均匀分布的形态,大部分存在于氮化钒组织相内。

The properties of ferrovanadium nitride alloys prepared by carbon-thermal reduction method were characterized and the influence of nitridation temperature and other parameters on N/V ratio and product nitridation rate was analyzed.The results show that:with the increase of the carbon coefficient,N/V increases first and then decreases;As the carbonization temperature increases,N/V increases.As the nitriding temperature increases,N/V first increases and then decreases.After nitriding temperature increase,nitriding rate is increased and first,the optimal nitriding temperature is 1450 ℃;When the nitridation time increased,the nitridation rate gradually increased and reached a stable state,and the optimal nitridation time was 15h.The phase types of ferrovanadium nitride include Fe phase,NV phase and a small amount of OV phase.Fe forms an inhomogeneous distribution in ferrovanadium nitride,and most of Fe exists in the phase of vanadium nitride.