HP295钢中含铈夹杂物形成的实验及热力学研究  

Experimental and Thermodynamic Study on Formation of Inclusions Containing Cerium in HP295 Steel

作　　者：王国承[1] 张立恒[1] 佟志芳[1] 杨少华[1] 宋伟 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]赣州铝业股份有限公司,江西赣州341100

出　　处：《中国稀土学报》2013年第2期161-168,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金青年科学基金项目(51004054);江西省教育厅青年科学基金项目(GJJ09519)资助

摘　　要：采用LaCrO3高温管式炉重熔HP295钢,向钢液中加入不同量的Ce进行脱氧,用SEM及EDS对钢中含Ce夹杂物进行分析,并对Ce-Al-O-S系进行热力学计算。实验结果显示,含Ce夹杂物主要为不规则的Ce2O3和近球形的Ce2O2S,大部分夹杂物尺寸小于5μm。热力学计算表明,含Ce夹杂物的形成主要受钢液中[O],[S]及[Al]S含量的影响,本实验条件下主要形成Ce2O3和Ce2O2S夹杂物;当钢液中Ce与Al的活度比≥0.08时,Al2O3可转变为CeAlO3夹杂物。The HP295 steel was remelted in the high temperature LaCrO3 tube furnace. The deoxidation experiments of liquid steel were carried out by adding different content of cerium. The inclusions of steel sample containing cerium were analyzed by SEM and EDS. Furthermore, the thermodynamics of Ce-Al-O-S system was calculated. The experimental results showed that the inclusions containing cerium were mostly irregular Ce2O3 and globular Ce2O2S, and the size of most of inclusions was less than 5 μm. The thermodynamic calculation indicated that the inclusions containing cerium are Ce2O3 and globular Ce2O2 S, and inclusions formation process was effected by content of [ O ], [ S] and [ Al]s in the current experimental conditions. The Al2O3 inclusion could be modified into CeAlO3 when the ratio of activity of Ce and Al was exceeding 0.08.

关 键 词：HP295钢 稀土铈 夹杂物 热力学 

分 类 号：TF114[冶金工程—冶金物理化学]