薄带中纳米级含Ti氧硫复合夹杂物复合机理研究  

COMPLEX MECHANISM OF NANO-SCALE Ti-CONTAINING OXIDE-SULFIDE COMPLEX INCLUSIONS IN STRIP

作　　者：孙菲菲[1] 陈洁云[1] 赵丹[1] 郑少波[1] 翟启杰[1] 李慧改[1] 

机构地区：[1]上海大学上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《上海金属》2015年第5期47-51,共5页Shanghai Metals

基　　金：973项目(No.2011CB012902);国家自然科学基金(No.51104099)资助

摘　　要：利用透射电子显微镜(TEM)对含Ti氧硫复合夹杂物进行成分和结构测定,利用Aziz模型计算钢液凝固时固液界面的溶质分布规律,并辅以热力学计算确定复合夹杂物的析出顺序。结果表明:含Ti氧硫复合夹杂物的形态为壳层结构:TiO2为核心,Fe2SiO4在核心外进行包裹,MnS附着析出在包裹膜上;钢液凝固时非金属元素在固液界面前沿的溶质分配较金属元素更易受影响;含Ti氧硫复合夹杂物在凝固时各物质的析出顺序为TiO2→Fe2SiO4→MnS。The composition and structure of Ti-containing complex inclusions were investigated by TEM. Solute distribution in front of SZL interface during steel solidification was calculated by Aziz model, and the precipitation sequence of inclusion was confirmed with thermodynamics calculation. The results showed that Ti-containing oxide-sulfide complex inclusions were core-shell structure, with TiO2 core, Fez SiQ wrapped outside and MnS attached on the package. Solute distribution of nonmetal elements was easier to be affected than metal elements during fast solidification. The precipitated sequence of Ti-containing complex inclusions was TiO2→Fe2SiO4 →MnS.

关 键 词：薄带 纳米级复合夹杂物 非平衡溶质分配 热力学 

分 类 号：TG142.41[一般工业技术—材料科学与工程]