Q355NE钢特厚板坯凝固过程模拟研究  

Study on Solidification Process Simulation of Q355NE Extra Heavy Steel Slab

作　　者：甄新刚 于科哉 张攀 徐李军[2,3] Zhen Xingang;Yu Kezai;Zhang Pan;Xu Lijun(Metallurgical Technology Department,Rizhao Steel Yingkou Medium Plate Co.,Ltd.;National Research Center of Continuous Casting Technology,Central Iron and Steel Research Institute;Material Digital R&D Center of China Iron&Steel Research Institute Group)

机构地区：[1]日钢营口中板有限公司冶金技术处 [2]钢铁研究总院连铸技术国家工程研究中心 [3]中国钢研科技集团有限公司数字化研发中心

出　　处：《宽厚板》2024年第1期1-7,共7页Wide and Heavy Plate

摘　　要：以(475×2000)mm断面的Q355NE钢特厚板坯为研究对象,通过射钉法和红外测温方法测量凝壳厚度及表面温度,将其作为凝固模型计算结果的验证。使用ProCAST软件进行凝固传热过程模拟,分析了不同拉速、过热度、比水量对铸坯温度场和凝固终点的影响规律。结果表明:与过热度和比水量的影响相比,拉速对其凝固终点、温度场影响较大,拉速每提高0.05 m/min,凝固终点平均后移4.54 m,铸坯完全凝固后的铸坯心部温度升高81℃左右;而比水量每降低10%,铸坯凝固终点后移0.33 m左右;过热度每升高5℃,铸坯凝固终点后移0.38 m左右。The thickness and surface temperature of the solidification shell measured by the Nail Shooting Method and infrared temperature measurement are used as the validation of the calculation results of the solidification model for the Q355NE extra heavy steel slab with a cross-section of(475×2000)mm.ProCAST software is used to simulate the solidification heat transfer process,and the effects of different casting speeds,superheat and specific water flow on the temperature field of the continuously cast slab and the solidification endpoint are analyzed.The results show that,compared with the effects of superheat and specific water flow,the casting speed is of a greater influence on the solidification endpoint and temperature field.For every 0.05 m/min increase in casting speed,the solidification endpoint is shifted back by about 4.54 m.The central temperature of the continuously cast slab after complete solidification increases by about 81℃.When the specific water flow decreases by 10%,the solidification endpoint of the continuously cast slab moves back about 0.33 m.With the superheat increasing by 5℃,the solidification endpoint of the continuously cast slab moves back about 0.38 m.

关 键 词：Q355NE钢特厚板坯 数值模拟 凝固终点 温度场 

分 类 号：TF777[冶金工程—钢铁冶金]