文献类型：期刊文献

英文题名：Structure of Solidified Films of CaO-SiO2 -Na2O Based Low-Fluorine Mold Flux

作者：Zeng, Jianhua Long, Xiao You, Xinchen Li, Min Wang, Qiangqiang He, Shengping

第一作者：Zeng, Jianhua

通信作者：He, SP[1]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Met Engn, 1 Caiguan Rd, Guiyang 550003, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Guizhou, Peoples R China

第一机构：Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

通信机构：corresponding author), Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China.

年份：2019

卷号：9

期号：1

外文期刊名：METALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000459738500092)】；

基金：This research was funded by Natural Science Foundation of China, grant number 51874057 and U1660204.

语种：英文

外文关键词：mold flux; low fluorine; internal crack; surface roughness; slag film

摘要：As an essential synthetic material used in the continuous casting of steels, mold fluxes improve the surface quality of steel slabs. In this study, a CaO-SiO2-Na2O-based low-fluorine mold flux was solidified by an improved water-cooled copper probe with different temperatures of molten flux and different probe immersion times. The heat flux through solid films and the film structures were calculated and inspected, respectively. Internal cracks (formed in the glassy layer of films during solidification) were observed. The formation and evolution of those cracks contributed to the unstable heat flux density. The roughness of the surface in contact with the water-cooled copper probe formed as films were still glassy and the roughness had no causal relationship with crystallization or devitrification. Combeite with columnar and faceted dendritic shapes were the main crystal in the film.