超低碳IF钢脱氧合金化过程中夹杂物的行为  

Behavior of inclusions in ultra-low carbon IF steel during deoxidation and alloying process

作　　者：于会香[1] 潘明 杨德新 YU Hui-xiang;PAN Ming;YANG De-xin(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2020年第6期46-53,共8页Iron and Steel

基　　金：国家重点研发计划资助项目(2017YFB0304000,2017YFB0304001);中央高校基本科研业务费专项资金资助项目(FRF-AT-18-008)。

摘　　要：为深入了解超低碳IF钢在脱氧合金化过程中夹杂物的行为,用高温电阻炉开展试验模拟实际生产中铝脱氧钛合金化过程,通过密集取样,详细研究了该过程中夹杂物的转变。研究发现,加铝前,钢中夹杂物主要为球形的FeOx;加铝后,最先生成浅灰色的球形Al2O3,然后向椭球形或单体块状Al2O3转变,随后迅速聚合形成不规则状Al2O3,最终聚合成簇群状Al2O3,整个过程大约在加铝后2min内完成;加钛后,钢液中形成3种类型的Al-Ti复合类夹杂物,但在加钛大约4min后便会转化为稳定的Al2O3相。整个脱氧合金化过程中,氧含量和夹杂物的量呈下降的趋势,钢液的洁净度逐渐提高。In order to deepen insight on the inclusions behavior in the ultra-low carbon IF steel during the deoxidation and alloying process,laboratory experiments were carried out to simulate the corresponding industrial process using a Si-Mo heated high-temperature furnace,and the inclusions were studied in detail by densely sampling during the experiment.It was found that before adding Al,the inclusions in the molten steel were mainly spherical FeOx.After adding Al,the light-black sphere Al2O3 formed firstly,then transformed into spheroidal or bulk shaped Al2O3,followed by the irregular Al2O3 rapidly,and finally cluster Al2O3 formed by aggregating.The whole transformation of Al2O3 was completed within around 2 min after adding Al.After adding Ti,three types of Al-Ti complex inclusions formed.However,they would transform into stable Al2O3 around 4 min after adding Ti.The total oxygen content and the amount of inclusions showed a decreasing trend during the deoxidation and alloying process,and the cleanliness of molten steel improved gradually.

关 键 词：超低碳IF钢 夹杂物 脱氧合金化 演变机理 

分 类 号：TF761.2[冶金工程—钢铁冶金]