工程科学学报2017，Vol.39Issue(2)：251-258,8.DOI:10.13374/j.issn2095-9389.2017.02.013
低碳钢连铸板坯表层凝固钩的特征
Subsurface hooks in continuous casting slabs of low-carbon steel
摘要
Abstract
Hook characteristics in continuous casting slabs of low-carbon steel under different casting conditions were investiga-ted. According to hook morphology, hooks were classified into different types. Distributions of bubbles and inclusions near hooks were analyzed, and the influence of casting parameters on hook depth was discussed. Bikerman' s equations and theory of meniscus solidifi-cation were used to explain the various hook morphology. Results show that on the basis of morphology hooks can be classified into four types, including whole-leaf type, double-hook type, truncated type and re-solidified type. The percentage of re-solidified type is the highest (46. 8%), and the percentages of whole-leaf type, truncated type and double-hook type are respectively 25. 3%, 7. 6% and 6. 3%. Studies demonstrate that the inclusion number near hooks is obviously higher than that in other zone, indicating floating inclu-sions in the mold can be captured by hooks. Comparing different casting parameters, the use of FC- Mold, the decrease of the sub-merged depth of the submerged entry nozzle ( SEN) and the increase of casting speed can reduce the hook depth. Calculated results of Bikerman's equation and theory of meniscus solidification can explain the formation mechanisms of different hook morphologies.关键词
低碳钢/连铸/板坯/振痕/凝固钩Key words
low-carbon steel/continuous casting/slabs/oscillation marks/solidified hooks分类
矿业与冶金引用本文复制引用
张旭彬,张立峰,王皓,王胜东,王强强,杨文..低碳钢连铸板坯表层凝固钩的特征[J].工程科学学报,2017,39(2):251-258,8.基金项目
国家自然科学基金资助项目(51274034,51334002,51404019) （51274034,51334002,51404019）
