氮在Fe-Cr-V液态高氮合金中的溶解行为

 采用MgO坩埚高频真空/加压感应炉在氮气压力04~10 MPa、温度1 570~1 640 ℃下，对加压感应熔炼Fe Cr V系高氮不锈钢进行了实验研究。结果表明，在30CaO 45Al2O3 25SiO2渣覆盖的情况下，氮在Fe 15Cr 10V、Fe 18Cr 10V、Fe 18Cr 15V和Fe 20Cr 20V液态合金中的溶解度分别为0595%、0736%、0776%和1020%，溶解度与氮分压的关系基本符合Sievert定律。渣对钢液吸氮和铝脱氧都起重要的作用，1 873 K、10 MPa氮气氛中，在30CaO 45Al2O3 25SiO2、40CaO 40Al2O3 20SiO2、40CaO 50Al2O3 10SiO2三种不同渣系作用下氮在液态Fe 18Cr 15V中的浓度分别是0776%、0849%和0884%。

Dissolution Behavior of Nitrogen in Liquid Fe-Cr-V High Nitrogen Alloy

Fe Cr V high nitrogen alloys melted in MgO crucibles using high frequency vacuum/pressurized induction furnace in 04-10 MPa nitrogen atmosphere at 1 570-1 640 ℃ have been investigated. The results showed that the solubilities of nitrogen in Fe 15Cr 10V, Fe 18Cr 10V, Fe 18Cr 15V and Fe 20Cr 20V liquid alloys with 30CaO 45Al2O3 25SiO2 as top slag were 0595%, 0736%, 0776% and 1020% respectively. Nitrogen dissolution in these liquid stainless steels follows the Sievert′s Law. The slag composition has important effects on nitrogen dissolution and the aluminum deoxidation in liquid stainless steels. At 1 873 K, in the 10 MPa nitrogen atmosphere, the concentrations of nitrogen in liquid Fe 18Cr 15V alloy with the top slag of 30CaO 45Al2O3 25SiO2, 40CaO 40Al2O3 20SiO2 and 40CaO 50Al2O3 10SiO2 were 0776%, 0849% and 0884% respectively.