连铸矫直过程板坯角部横向裂纹数值分析  

Numerical Analysis of Transversal Crack on Slab Corner in Straightening During Continuous Casting

作　　者：王悦新[1] 喻海良[1] 刘相华[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《钢铁研究学报》2009年第12期14-16,共3页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50534020);国家973计划资助项目(2006CB605208-1)

摘　　要：连铸过程中板坯角部可能出现横向裂纹，这些裂纹严重影响着连铸坯的质量和产量。采用显式动力学有限元方法对连铸矫直阶段连铸板坯表层金属应力变化规律进行了模拟。分析了角部应力的变化规律，并对矫直过程中连铸板坯应力分布对角部横向裂纹的影响进行了讨论。研究发现在连铸过程扇形段6～8段处连铸坯内弧侧表面出现较大的拉应力，可能促使裂纹扩展。研究结果对指导连铸生产具有重要的实际意义和理论意义。The transversal cracks might appear on slab corner positions during continuous casting, which severely affect the quality and quantity of products. The behavior of slab in the straightening period during continuous casting, and the stress distribution on slab surface and the change regularity of stress on slab corner were obtained by dominant kinetics finite element method, finally the influence of stress distribution on slab on the initiation of transversal cracks on slab corner was discussed. Results show that the tensile stress appears on slab surface of inner arc side when the slab passes through the stage 6--8 during continuous casting. The research results are good for guiding the production.

关 键 词：连铸 横向裂纹 有限元 

分 类 号：TF777[冶金工程—钢铁冶金]