合金钢中镁铝尖晶石夹杂物生成与转化热力学  

Thermodynamics on the formation and transformation of MgO·Al_2O_3 inclusions in alloy steel

作　　者：姜桂连[1,2] 李京社[1] 李向东[3] 王再飞[1] 林晓川[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]天津钢管集团有限公司炼钢厂,天津300301 [3]焦作大学,焦作454000

出　　处：《北京科技大学学报》2009年第S1期92-94,共3页Journal of University of Science and Technology Beijing

基　　金：中国博士后科学基金资助项目(No.20080430020)

摘　　要：通过FactSage 6.0热力学软件计算,研究了合金钢中镁铝尖晶石(MgO.Al2O3)形成和向低熔点复合夹杂物转化的热力学条件,以及钙处理对钢液成分和夹杂物成分的影响.研究结果表明:钢中生成镁铝尖晶石夹杂物需要镁的含量较低;当钢液中溶解钙的质量分数为1×10-6时,镁铝尖晶石会转化变成液态的复合夹杂物;随着钙加入量的增加,液态复合夹杂物中Al2O3和MgO的含量继续降低,CaO的含量继续增加,SiO2的含量较低,基本保持不变;随着钙加入量的增加,钢液中的氧含量会降低,镁含量增加.Thermodynamics on the formation and transformation of spinel inclusions in gas cylinder steel and the effect of calcium treatment on the compositions of molten steel and inclusions were studied by using Factsage 6.0 software. The results show that spinel inclusions will be produced even through the content of magnesium is very low,and the spinel inclusions will transform to liquid complex inclusions when the content of dissolved Ca in the molten steel exceeds 1×10-6. With the increase of calcium,on one hand,the contents of Al2O3 and MgO in the complex inclusion keep decreasing,and the content of CaO increases,but the content of SiO2 changes a little. On the other hand,the content of oxygen decreases,while the content magnesium increases.

关 键 词：合金钢 非金属夹杂物 镁铝尖晶石 热力学 

分 类 号：TF762.3[冶金工程—钢铁冶金]