连铸坯液固相分数检测及液芯末端位置定位新方法  

New method for determination of liquid-solid fraction and liquid core end of continuous casting slab

作　　者：王兆峰[1,2] 姚曼[2] 王旭东[2] 李国斌[2] 刘宇[2] 施桂钱[2] 杨龙胜[3] 陆洪周 张晓兵[3] 

机构地区：[1]大连理工大学电子信息与电气工程学部,辽宁大连116024 [2]大连理工大学材料科学与工程学院,辽宁大连116024 [3]江苏沙钢集团,江苏张家港215625

出　　处：《大连理工大学学报》2013年第2期221-226,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(51004012);"八六三"国家高技术研究发展计划资助项目(2009AA04Z134);中国博士后科学基金资助项目(2012M520621)

摘　　要：为了准确测量二冷区内铸坯的液固相分数,精确预报铸坯的凝固终点,在理论解析、物理模拟和实验验证研究的基础上,提出了振动法检测连铸坯液固相分数和液芯末端位置的新方法,总结了激振力和受迫振动位移等信号的反馈规律,比较了振频和激振力对相位差的影响,并对检测方案总体思路的可行性进行了论证.研究结果为板坯凝固过程中液固相分数及凝固终点的在线检测提供了指导和参考.To accurately measure the liquid-solid fraction of casting slab in the secondary cooling zone and precisely predict the final solidifying end of casting slab, a novel method, which is called vibration method, is presented to detect the liquid-solid fraction and locate the liquid core end of continuous casting slab, based on theoretical analyses, physical simulation and experimental validation. The feedback patterns of exciting force signal and forced vibration displacement signal are concluded, the effects that vibration frequency and exciting force impact on the phase difference are compared. And the feasibility of detection scheme is proved. The research results provide guidance and reference for the on-line detection of liquid-solid fraction and final solidifying end of the slab.

关 键 词：凝固终点 理论解析 物理模拟 液固相分数 

分 类 号：TF777[冶金工程—钢铁冶金]