250～320 mm连铸板坯堆垛缓冷过程仿真计算  

Simulation Calculation on 250～320 mm Casting Slab during Stacking Slow Cooling Process

作　　者：王卫华[1] 王文军[1] 刘洋[1] 陈霞[1] 

机构地区：[1]首钢技术研究院,北京100043

出　　处：《特殊钢》2013年第1期13-15,共3页Special Steel

摘　　要：L245、D36、X70等钢种连铸板坯生产流程为铁水预处理-100 t转炉-LF-RH-250～320 mm×2000 mm板坯连铸。当铸坯人炉温度为650～700℃,因AlN在晶界析出,在轧制过程钢板易出现爪裂,当铸坯入炉温度控制在500～550℃则可避免钢板爪裂。通过ANSYS有限元软件,对板坯堆垛温度场和降温速率进行数值模拟。模型计算结果表明,250 mm和320 mm厚铸坯分别堆垛12 h和24 h后,可使堆垛中心铸坯表面温度达到600℃以下,现场实测值与模拟结果相同。The casting flow sheet for slab of L245, D36 and X70 etc steel grades is metal pretreatment-100 t converf- er-LF-RH-250 - 320 × 2 000 mm slab casting. As temperature of charging casting slab is 650 - 700 ℃ , because of A1N precipitates at grain boundary the claw-cracks of steel plate easily occur, and as the temperature of charging slab is con- trolled at 500 -550 ℃ the claw-cracks of steel plate are avoided. The numerical simulation on temperature field and tem- perature dropping rate of staking slab has been carried out by ANSYS finite element method software. The model calculation results show that as 250 mm slab and 320 mm slab are respectively stacked for 12 h and 24 h, the surface temperature of slab at centre of stacking is less than 600 ℃, and the measured value at production situation conforms to the simulation result.

关 键 词：连铸坯 堆垛缓冷 热送 有限元 数值模拟 

分 类 号：TF777.1[冶金工程—钢铁冶金]