中碳钢板坯保护渣玻璃质渣膜脱玻化  

Devitrification of Mold Flux Glassy Film for Medium Carbon Steel Slab

作　　者：赵紫锋[1] 张炯明[1] 王新华[1] 李宏[1] 

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：《钢铁研究学报》2009年第11期16-19,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金和上海宝钢集团公司联合资助项目(50774109)

摘　　要：连铸保护渣玻璃质渣膜回热脱玻化现象对渣膜的热阻有重要影响,对两种不同结晶温度的中碳钢板坯用保护渣制备玻璃质渣膜并在不同温度下进行了回热试验。结果表明,经过回热处理的玻璃质渣膜发生了脱玻化现象,析出晶体相主要为枪晶石;随着处理温度的提高,渣膜结晶度增加;高结晶温度的保护渣具有较强的脱玻化能力,且脱玻化温度较低;具有较高结晶温度的保护渣更易形成热阻较大的渣膜。The crystallization from glassy flux film for mold powder during annealing has an important influence of thermal resistance on mold flux film. The glassy flux films of two kinds of mold powder with different crystallization temperature for medium carbon steel slab casting were made and annealed at different temperature. The results show that the devitrified phenomenon concured for the glassy flux film during annealing and the main crystal phase is cuspidine （3CaO · 2SIO2 · CaF2）; The degree of crystallization increases as treating temperature rises; The powder for higher crystallization temperature has stronger crystallization capability during annealing and lower devitrifying temperature; The flux film formed from the mold powder with higher crystallization temperature has higher thermal resistance.

关 键 词：中碳钢 渣膜 回热处理 

分 类 号：TF777[冶金工程—钢铁冶金]