倒角结晶器温度场应力场有限元模拟  

FEM Simulation for Temperature and Thermal Stress Field of Chamfering-Mold

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：《连铸》2013年第1期5-9,13,共6页Continuous Casting

摘　　要：为了有效、稳定地控制连铸坯角横裂纹缺陷,某厂对倒角结晶器进行了开发和应用工作,并取得了良好效果。利用商业有限元软件ANSYS,以断面250mm×2000mm的连铸坯为计算对象,对不同尺寸的倒角结晶器温度场以及直角结晶器和35mm×35mm倒角结晶器的温度场/应力场进行了比较计算。计算结果表明:当倒角尺寸为35mm×35mm时,倒角部位的最低温度达到918℃,角部最低温度从高温拉伸曲线的高温侧逐渐脱离了脆性区;与直角铸坯相比,倒角铸坯完全消除了角部的应力集中现象。即采用倒角结晶器后,铸坯z向应力最大值降低19.2%,角横裂纹出现的可能性极大降低。Development and application for chamfering-mold has been carried out in order to control the corner trans- verse crack defect of continuous casting slab effectively and steadily and the satisfactory effect has been acquired. By means of ANSYS FEM software, taking 250 mm× 2 000 mm continuous casting slab as object, the temperature field of chamfering-mould of different dimensions, thermal stress field of right-angle-mold and 35 mm × 35 mm chamfering-mold have been calculated. The calculation results show that the lowest temperature of chamfered part reached 918 ℃ when the chamfer dimension is 35 mm× 35 mm, the minimum temperature of the corner from high temperature tensile curve of the high temperature side is gradually separated from the brittle zone; comparing with rectangular-slab, the chamfering-slab corner stress concentration is completely eliminated. So if the chamfering- mold used the maximum z stress of slab is reduced by 19.2%, transverse corner crack occurrence possibility will be greatly reduced.

关 键 词：倒角结晶器 ANSYS 有限元 温度场 应力场 角横裂纹 

分 类 号：TF777[冶金工程—钢铁冶金]