Influence of Basicity of Mold Flux on its Crystallization Rate

被引：29
作者：
Hanao, Masahito [1 ]
机构：
[1] Sumitomo Met Ind Ltd, Res & Dev Labs, Kamisu, Ibaraki 3140255, Japan
来源：
ISIJ INTERNATIONAL | 2013年 / 53卷 / 04期
关键词：
continuous casting; mold flux; crystallization; CCT diagram; crystallization temperature; crystallization rate; viscosity; confocal laser microscope; IN-SITU OBSERVATION; RADIATIVE HEAT-TRANSFER; FILM; CONDUCTIVITIES; SOLIDIFICATION; OXIDES;
D O I：
10.2355/isijinternational.53.648
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Crystallization of mold flux was observed with confocal laser microscope. Crystallization temperature, CCT curve and crystallization rate were evaluated from the observed images. The evaluated results were compared between two kinds of mold flux, and influence of basicity on crystallization rate was discussed. Crystallization temperature increased with basicity. Crystallization rate also increased with basicity, but its dependency on cooling rate was differed by basicity. The difference could be explained by the viscosity of mold flux at crystallization temperature. Crystallization rate has clear relation to the viscosity at crystallization temperature, and the rate increased with decrease of the viscosity. Two kinds of mold flux were unified in this relationship. Crystallization is controlled with basicity in terms of not only equilibrium but also kinetics through viscosity.
引用
收藏
页码：648 / 654
页数：7
相关论文
共 38 条
[1]  
Bagha S., 1988, 3RD INT C MOLT SLAG, P235
[2]   ''In-situ'' real time observation of planar to cellular and cellular to dendritic transition of crystals growing in Fe-C alloy melts [J].
Chikama, H ;
Shibata, H ;
Emi, T ;
Suzuki, M .
MATERIALS TRANSACTIONS JIM, 1996, 37 (04) :620-626
[3]   Thermal resistance at the interface between mold flux film and mold for continuous casting of steels [J].
Cho, J ;
Shibata, H ;
Emi, T ;
Suzuki, M .
ISIJ INTERNATIONAL, 1998, 38 (05) :440-446
[4]   Heat transfer across mold flux film in mold during initial solidification in continuous casting of steel [J].
Cho, JW ;
Emi, T ;
Shibata, H ;
Suzuki, M .
ISIJ INTERNATIONAL, 1998, 38 (08) :834-842
[5]  
Dobashi S., 1972, CHEM GLASS, P37
[6]  
Fukuda J., 1992, CAMP ISIJ, V5, P281
[7]   Influence of Na20 on phase relation between mold flux composition and cuspidine [J].
Hanao, M ;
Kawamoto, M ;
Watanabe, T .
ISIJ INTERNATIONAL, 2004, 44 (05) :827-835
[8]  
Hanao M., 2008, CAMP ISIJ, V21, P822
[9]   Flux film in the mold of high speed continuous casting [J].
Hanao, Masahito ;
Kawamoto, Masayuki .
ISIJ INTERNATIONAL, 2008, 48 (02) :180-185
[10]   Influence of Mold Flux on Initial Solidification of Hypo-Peritectic Steel in a Continuous Casting Mold [J].
Hanao, Masahito ;
Kawamoto, Masayuki ;
Yamanaka, Akihiro .
ISIJ INTERNATIONAL, 2012, 52 (07) :1310-1319
1234