摘要
选取常规用保护渣和高拉速用优化保护渣研究了其高温结晶性能与玻璃质渣膜回温结晶性能.研究表明,优化后的高碱度保护渣具有较高的结晶温度和较低的脱玻化温度,同等实验条件下析晶能力更强,结晶相主要为枪晶石(3CaO.2SiO2.CaF2),并且晶粒粗大,凝固组织中有大量空隙,渣膜表面粗糙度大,有利于增加渣膜热阻,更适合于高拉速生产.
The crystallization capability at high temperature and devitrification properties of glassy films in annealing of routine and optimized high-speed casting mold flux were studied. The results show that the optimized mold flux with high basicity has a higher crystallization temperature and a lower devitrified temperature;also,its crystal-forming abilitiy is much stronger in the same conditions. The main crystal phase of the optimized mold flux is Cuspidine(3CaO·2SiO2·CaF2)and it has larger crystalline particles. Moreover,there are a great number of gaps in the solidification structure,which can increase the roughness on the surface of flux films. Consequently,it can enhance the heat resistance of flux films and will be more suitable for high-speed casting.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2009年第S1期28-31,共4页
Journal of University of Science and Technology Beijing
关键词
中碳钢
结晶性能
脱玻化
medium-carbon steel
crystallization properties
devitrification
