摘要
根据IF钢连铸坯凝固钩的形成机理,通过建立二维纵向切片传热模型,模拟了凝固钩的演变行为;结合金相试验结果分析了连铸工艺参数对凝固钩深度的影响。结果表明,在初始凝固过程中,凝固钩中经历了形成、熔化及生长等阶段,在数学模拟条件下,当结晶器内由浸入式水口流出的钢液温度为1 555℃、拉速为1.3m/min时,在距离弯月面55.12mm处,即凝固钩生长达到稳定状态,其深度为2.368mm。当拉坯速度、结晶器内钢水温度、振动频率增加时,凝固钩深度均减小。凝固钩数学模拟结果符合实际生产。
A two dimensional longitudinal slice heat transfer model of the initial solid shell was built to simulate the hook growing behavior according to the hook formation mechanism in the IF steel slab.The effect of casting parameters on the hook depth was discussed by combining metallographic experiments results.The research results show that the initial solidification process of the hook undergoes the stages of forming,melting and growing.Under the mathematical simulation condition,when the temperature of the liquid steel in the mold flowing out from the SEN is1 555℃,the casting speed is 1.3 m/min and the shell runs away from the meniscus about 55.12 mm,the hook growth reaches a steady state,and the hook depth is 2.368 mm.The hook depth decreases with the increasing of the casting velocity,the oscillation frequency and the liquid steel temperature in the mold.The mathematical simulation result of the hook is basically consistent with the actual production practice.
作者
肖鹏程
赵茂国
朱立光
何生平
XIAO Peng-cheng;ZHAO Mao-guo;ZHU Li-guang;HE Sheng-ping(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063009,Hebei,China;Hebei Province High Quality Steel Continuous Casting Engineering Technology Research Center,Tangshan 063009,Hebei,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第7期49-55,共7页
Iron and Steel
基金
国家自然科学基金青年基金资助项目(51404088)
河北省自然科学基金资助项目(E2015209217)
关键词
IF钢
凝固钩
纵向传热模型
金相试验
连铸工艺参数
IF steel
hook
slice heat transfer model
metallographic experiment
casting parameter
