加压感应熔炼Fe-Cr-V系高氮钢及其铝脱氧

Pressurized Induction Melting of Fe-Cr-V High Nitrogen Steels and Its Deoxidation With Al

真空/加压感应炉以1.0 MPa高纯氮(体积分数≥99.999%)为氮源熔炼了Fe-Cr-V高氮钢,分析了氮的溶解度与氮分压和铬、钒含量的关系。氮在Fe-Cr-V合金中的溶解服从Sievert定律,氮的溶解度随铬和钒含量的增加而增加。用Al和Fe-Al(铝的质量分数为50%)合金加顶渣对Fe-Cr-V合金进行了脱氧实验,Fe-Al合金加CaF2-CaO-Al2O3(各成分比例为1∶4∶1)顶渣40 min可使Fe-20Cr-1.93V合金的氧的质量分数降低到0.007 2%。

High nitrogen Fe-Cr-V alloys was melted in a vacuum/pressurized induction furnace using high purity nitrogen gas as the source of nitrogen. The relationships between nitrogen solubility and nitrogen pressure, contents of Cr and V were investigated. The dissolution of nitrogen in Fe-Cr-V alloys obeys the Sievert＇s law. Nitrogen solubility increases with the increase of concentration of Cr and V. The deoxidation experiments were carried out using Al or Fe-Al alloy with top slags. The oxygen content in an Fe-20Cr-1.93V alloys can be decreased to 0. 007 2% by using Fe-Al alloy with CaF2-CaO-Al2O3 top slags in 40 min.