高活性钛熔体与BaZrO3耐火材料界面反应机理  

Interfacial Reaction Between High Reactivity Titanium Melt and BaZrO_3 Refractory

作　　者：陈光耀[1] 程治玮 王树森 秦子威 鲁雄刚[1,2] 李重河 

机构地区：[1]省部共建高品质特殊钢冶金与制备国家重点实验室,上海市钢铁冶金新技术开发应用重点实验室,上海大学材料科学与工程学院,上海200072 [2]上海特种铸造工程技术研究中心,上海201605

出　　处：《硅酸盐学报》2016年第6期890-895,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51225401,51374142);国家“973”计划(2014CB643403);上海市科委基金(14JC1491400)资助

摘　　要：利用BaZrO_3坩埚结合感应加热技术熔炼钛合金,通过光学显微镜、扫描电子显微镜、X射线衍射仪以及原子发射光谱仪等分析了BaZrO_3耐火材料与熔体接触后微观形貌变化及BaZrO_3耐火材料与合金之间的相互熔解量,研究了BaZrO_3耐火材料与熔体界面的反应、组成元素在熔体中熔解量随接触时间变化规律及与钛熔体界面反应机理。结果表明:熔炼低含钛量的钛合金,BaZrO_3耐火材料渗透层厚度约为20μm,随着BaZrO_3耐火材料与熔体接触时间增加,氧元素在熔体中熔解量逐渐降低,锆含量则并未出现明显变化,说明BaZrO_3耐火材料不与钛熔体发生界面反应;熔炼高含钛量钛合金时,BaZrO_3耐火材料侵蚀层厚度约为2 000μm,锆和氧在熔体中熔解量逐渐升高,说明高钛含量熔体与BaZrO_3耐火材料发生界面反应,反应过程中有BaO生成。Titanium alloy was melted in a BaZrO3 crucible by an induction melting process. The microstructure of BaZrO3 refractory and the mutual dissolution after melted at different time were analyzed by optical microscopy, scanning electron microscopy, X-ray diffraction and atomic emission spectrometry, respectively. The interfacial reaction between titanium melt and BaZrO3 refractory and the dissolve behavior of BaZrO3 at different time were investigated. The results show that the thickness of BaZrO3 refractory permeable layer is approximately 20um after melting a low-titanium content alloy. The oxygen content reduces and the zirconium content does not change when BaZrO3 refractory contacts with the time, indicating that the BaZrO3 refractory does not react with titanium melt. Meanwhile, the thickness of BaZrO3 refractory erosion layer is approximately 2 000um after melting a high-titanium content alloy. The oxygen and zirconium contents increase with increasing the contact time, showing that the BaZrO3 refractory reacts with titanium melt and BaO appears during the melting process.

关 键 词：锆酸钡 耐火材料 钛合金 钛含量 界面反应 

分 类 号：TQ17[化学工程—硅酸盐工业]