Cr12N高氮钢冶炼过程中氮的控制  

Control of Nitrogen on Cr12N High Nitrogen Steel

作　　者：王书桓[1] 郭建龙[1] 赵定国[1] 李秋京[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北唐山063009

出　　处：《钢铁研究学报》2014年第11期16-19,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51304060);河北省自然科学基金资助项目(E2013209113)

摘　　要：在高温高压反应釜内冶炼Cr12N高氮钢,通过试验发现,在Cr12N的熔炼过程中,随着压力的提高,钢中的氮含量不断增加,钢锭中得到的固相中氮的饱和溶解度和Chipman等人的热力学模型计算得到的氮的饱和溶解度有一定的偏差,为了修正这个偏差,引进了Burton-Prim-Slichter方程,修正后得到液相中氮的饱和溶解度的修正值和计算值吻合得很好。计算了在Cr12N的冶炼过程中,防止气泡析出所需要的最小凝固压力为2.84 MPa,通过试验发现,在高的凝固压力下,钢锭的致密性和缩孔现象得到明显改善。Cr12Nhigh nitrogen steel was smelted in high voltage and vacuum vessel.Through the experiment,it can be found that with increasing the pressure,the nitrogen content of the steel increased and nitrogen solubility of solid phase of ingots had some bias with the calculated values of thermodynamic model proposed by Chipman et al.It introduced the equation of Burton-Prim-Slichter for correcting this bias.From this equation,It can be found that the correction values of saturated solubility of nitrogen in the liquid phase are in good agreement with the measured values.It also can be calculated that the minimum pressure for preventing bubble precipitation is 2.84 MPa in the solidification process of Cr12 Nand when solidification pressure is higher,the density and shrinkage of ingot has been significantly improved.

关 键 词：高氮钢 饱和溶解度 气泡 凝固压力 

分 类 号：TF76[冶金工程—钢铁冶金]