基于汽车大梁钢板坯数值模拟的连铸工艺优化与应用  

Optimization and application of continuous casting process based on numerical simulation of automobile beam steel slab

作　　者：于科哉 张攀 王国斌 徐李军[1,2,3] YU Kezai;ZHANG Pan;WANG Guobin;XU Lijun(National Research Center of Continuous Casting Technology,Central Iron and Steel Research Institute,Beijing 100081,China;Zhongda National Engineering&Research Center of Continuous Casting Technology Co.,Ltd.,Beijing 100081,China;Material Digital R&D Center of China Iron&Steel Research Institute Group,Beijing 100081,China)

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081 [2]中达连铸技术国家工程研究中心有限责任公司,北京100081 [3]中国钢研科技集团有限公司数字化研发中心,北京100081

出　　处：《连铸》2025年第1期111-119,共9页Continuous Casting

摘　　要：针对汽车大梁钢510L板坯的鼓肚变形和内部质量缺陷,建立板坯凝固传热模型,研究了不同拉速和比水量对板坯凝固进程和坯壳厚度的影响,分析了工艺优化前后轻压下工艺特征参数对铸坯心部质量缺陷的作用效果。基于凝固传热模拟分析及生产状况,将二冷比水量由1.01 L/kg增至1.41 L/kg,轻压下位置由3个扇形段优化为2个扇形段且调整压下量。结果表明,在第1段入口处板坯鼓肚变形量最大,工艺优化后在1段入口处坯壳厚度由39.05 mm增至40.78 mm,鼓肚变形量由0.69 mm降至0.51 mm;7、8段压下率增至0.94 mm/m和1.19 mm/m,铸坯整体内部质量大幅提升,中心偏析评级降至C类0.5级,疏松为0.5级。Aiming at the bulging deformation and internal quality defects of 510Lslab of automobile beam steel,a slab solidification heat transfer model was established to study the effects of different casting speeds and specific water flow on the slab solidification process and shell thickness,and the effect of soft reduction process characteristic parameters on the quality defects of slab core before and after process optimization was analyzed.Based on the simulation analysis of solidification heat transfer and production conditions,the specific water flow of secondary cooling was increased from 1.01L/kg to 1.41L/kg;the soft reduction position was optimized from three segments to two segments and the reduction amount was adjusted.The results showed that the bulging deformation of the slab is the largest at the entrance of the first segment.After the process optimization,the shell thickness at the entrance of the first segment increases from 39.05mm to 40.78mm,and the bulging deformation decreases from 0.69mm to 0.51mm.The reduction rates of the 7th and 8th segment increase to 0.94mm/m and 1.19mm/m,and the overall internal quality of the slab is significantly improved.The center segregation rating is reduced to C 0.5,and the porosity is 0.5.

关 键 词：数值模拟 凝固传热 轻压下 中心偏析 疏松 

分 类 号：TG3[金属学及工艺—金属压力加工]