【作者】 孙海波； 李烈军；

【Author】 Sun Haibo;Li Liejun;School of Materials Science and Energy Engineering, Foshan University;School of Mechanical and Automotive Engineering, South China University of Technology;

【机构】 佛山科学技术学院材料科学与能源工程学院； 华南理工大学机械与汽车工程学院；

【摘要】 连铸过程中,钢液浇铸过热度对铸坯内部柱状晶与等轴晶区的相对大小有重要影响,进而影响着铸坯内部致密度和宏观偏析。结合前人研究成果,总结了连铸过程中不同工作区域,如中间包、浸入式水口和结晶器区域,内钢液过热度控制技术及其机理,系统分析并评述了不同低过热度控制技术的优劣势,提出了旋流水口加结晶器电磁搅拌新型交替搅拌浇铸技术,为进一步改善铸坯内部质量提供了研究方向。更多还原

【Abstract】 The teeming superheat degree of molten steel has a significant influence on the ratio between columnar and equiaxed crystals of strand in a continuous casting(CC) process, and then affects the internal soundness and macro-segregation of strand. Based on the previous research results,the control technology and mechanism of low superheat teeming technologies at different operating area, such as, tundish, submerged entry nozzle, and mould region, in the CC process were reviewed. The strengths and weaknesses analysis on the different low superheat teeming technologies were assessed. A novel alter stirring mode in the mould cavity generated by a combination of SFN and M-EMS for bloom continuous casting was proposed, which may be a new research direction to further improve the strand internal quality.更多还原