二冷配水优化对钛微合金钢铸坯质量的影响  

Influence of secondary cooling water distribution optimization on quality of titanium microalloyed casting slab

作　　者：孙风杰 黄伟丽 陈伟 王杏娟 李耀 牛跃威 SUN Fengjie;HUANG Weili;CHEHN Wei;WANG Xingjuan;LI Yao;NIU Yuewei(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063000,Hebei,China;Technology Center of Delong Steel Co.,Ltd.,Xingtai 054009,Hebei,China;Hebei Hot Rolled Strip Technology Innovation Center,Xingtai 054009,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063000 [2]德龙钢铁有限公司技术中心,河北邢台054009 [3]河北省热轧板带钢技术创新中心,河北邢台054009

出　　处：《连铸》2023年第4期17-22,共6页Continuous Casting

基　　金：国家自然科学基金资助项目(51974133);河北省自然科学基金资助项目(E2019209543)。

摘　　要：基于德龙公司钛微合金钢DL350铸坯中心裂纹、三角区裂纹和产品伸长率不足的问题。通过二冷配水优化制度结合冶金限制准则建立了铸坯传热模型,进行了二冷配水优化的研究;采用ANSYS仿真模拟0.9~1.2 m/min下不同比水量铸坯的温度。结果表明,模拟和试验能够良好吻合,并且优化比水量后的铸坯质量得到了提升,依据拉速关联配水法得出了不同拉速下0.9、1.0、1.1、1.2 m/min最适宜的比水量分别为0.68、0.73、0.77、0.80 L/kg。在生产上也验证了模拟的正确性,从优化后生产铸坯的低倍形貌来看,铸坯缺陷明显消除,铸坯的表面及内部质量均满足轧制等工艺需要,最终提升了产品的伸长率,满足了生产需要。Based on the problems of center crack,triangle crack and product elongation deficiency of DL350 billet of titanium microalloy steel of Delong Company,the heat transfer model of billet was established by the optimization system of secondary cooling water distribution combined with the metallurgical limit criterion,and the optimization of secondary cooling water distribution was studied.ANSYS simulation was used to simulate the temperature of different specific water volume at 0.9-1.2 m/min.The results show that the simulation and experiment are in good agreement,and the quality of casting billet with specific water volume is improved after optimization.According to the drawing speed correlation water distribution method,the optimal specific water volume of 0.9,1.0,1.1,1.2 m/min at different drawing speeds are 0.68,0.73,0.77,0.80 L/kg.In production,the correctness of the simulation is also verified.From the morphology of the low magnification for billet produced after optimization,the defects of the billet great elimination,the surface and internal quality of the billet meet the needs of rolling technology,and finally the elongation of the product is improved and the production needs are met.

关 键 词：铸坯缺陷 数学模拟 比水量 伸长率 钛微合金化 

分 类 号：TF777[冶金工程—钢铁冶金]