连铸保护渣脱玻化行为研究  

Study on Devitrification Behavior of Continuous Casting Mold Flux

作　　者：朱立光[1] 李曜光 王杏娟[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北省现代冶金技术重点实验室,河北省高品质钢连铸工程技术研究中心,河北唐山063009

出　　处：《钢铁钒钛》2015年第4期94-100,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(51074063);国家自然科学基金(51404088)资助

摘　　要：连铸过程中,保护渣玻璃体渣膜回温脱玻化现象对铸坯向结晶器的传热有着重要的影响。通过运用SHTTⅡ型熔化结晶温度测试仪并结合扫描电镜和XRD分析,探究了保护渣玻璃体渣膜的脱玻化规律,为进一步研究保护渣脱玻化行为对结晶器传热的影响打下基础。试验结果表明:玻璃体保护渣在回温过程中发生了脱玻化现象,析出晶体主要是枪晶石;随着升温速度的升高,保护渣发生脱玻化温度升高;随着温度的升高,脱玻化结晶率先升高后有所降低;随着恒温设定温度的升高,发生脱玻化的孕育时间减少;随着玻璃体渣膜处理温度的升高,渣膜表面粗糙度增大,内部空洞增多。In order to investigate devitrification behavior of continuous casting mold flux in the process of annealing,glassy flux was annealed by single hot thermocouple technique,and then observed by scanning electron microscope and XRD. It is found out that the devitrified phenomenon occurred from the glassy flux during annealing and the main crystal phase is cuspidine. Temperature of devitrification increases with increasing annealing rate. When treating temperature is increased,degree of crystallization increases first then decreases. Increasing the steady temperature causes the shorter incubation time. With treating temperature of glassy flux film increase,the roughness on the surface of flux film increases,and the number of void increases.

关 键 词：连铸 保护渣 渣膜 热丝法 回温处理 脱玻化 

分 类 号：TF777[冶金工程—钢铁冶金]