Thermomechanical Behavior in Continuous Bloom Casting with Different Mold Tapers  

作　　者：罗歆 陈永 沈厚发 

机构地区：[1]Key Laboratory for Advanced Materials Processing Technology,Department of Mechanical Engineering,Tsinghua University [2]Panzhihua Iron and Steel (Group) Corp.

出　　处：《Tsinghua Science and Technology》2008年第5期598-604,共7页清华大学学报（自然科学版（英文版）

基　　金：the Iron and Steel Research Joint Fund of the National Natural Science Foundation of China (No. 50474088);Baoshan Steel Complex of Shanghai in China

摘　　要：A two-dimensional finite element model was used to analyze the thermal and mechanical behavior during solidification of the strand in a continuous bloom casting mold. The coupled heat transfer and deformation were analyzed to simulate the formation of the air gap between the mold and the strand. The model was used to investigate the influence of mold taper on the temperature and stress distributions in the strand. The results show that the air gap mainly forms around the strand corner, causing a hotter and thinner solidifying shell in this region. The mold taper partially compensates for the strand shell shrinkage and reduces the influence of the air gap on the heat transfer. The mold taper compresses the shell and changes the stress state around the strand corner region. As the strand moves down into the mold, the mold constraint causes compressive stress beneath the corner surface, which reduces the hot tear that forms on the strand.A two-dimensional finite element model was used to analyze the thermal and mechanical behavior during solidification of the strand in a continuous bloom casting mold. The coupled heat transfer and deformation were analyzed to simulate the formation of the air gap between the mold and the strand. The model was used to investigate the influence of mold taper on the temperature and stress distributions in the strand. The results show that the air gap mainly forms around the strand corner, causing a hotter and thinner solidifying shell in this region. The mold taper partially compensates for the strand shell shrinkage and reduces the influence of the air gap on the heat transfer. The mold taper compresses the shell and changes the stress state around the strand corner region. As the strand moves down into the mold, the mold constraint causes compressive stress beneath the corner surface, which reduces the hot tear that forms on the strand.

关 键 词：heat transfer STRESS mold taper continuous casting finite element model 

分 类 号：TG249.7[金属学及工艺—铸造]