板坯连铸倒角结晶器温度场和应力场有限元模拟  

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

出　　处：《首钢科技》2012年第6期7-11,18,共6页Shougang Science and Technology

摘　　要：研究了利用ANSYS有限元软件，以断面尺寸为250mm×2000mm的连铸板坯为计算对象，对不同尺寸的倒角结晶器温度场以及直角结晶器和倒角尺寸为35mm×35mm的倒角结晶器温度场和应力场进行比较计算。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；相比直角连铸坯，倒角连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，连铸坯z向应力最大值降低19．2％，角横裂纹出现的可能性显著降低。In virtue of ANSYS FEM software and as the 250 mm × 2 000 mm slab is the counting object, this paper investigates the chamfering-mould temperature filed with different sizes and compares the temperature and strain fields calculating results between the right-angle mould and 35 mm × 35 mm chamfering-mould. The calculation results show that the lowest temperature of chamfered part reaches 918 ℃ when the chamfer dimension is 35 mm ×35 mm, the minimum temperature of the corner separates from the brittle zone gradually from the high temperature side of high- temperaturetensile curve. Comparing the rectangularslab, the chamferingslab comer stress concentration is completely eliminated. That＇s to say, with the use of the chamfering-mold, the maximum value of Z stress of slab reduces 19.2%, and the occurrence possibility of transverse comer crack is sharply 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：TF341.6[冶金工程—冶金机械及自动化]