冷却结构对连铸结晶器铜板应力分布影响数值模拟.pdfVIP

冷却结构对连铸结晶器铜板应力分布影响数值模拟 孟祥宁 王卫领 朱苗勇 （东北大学材料与冶金学院，沈阳 110819 ） 摘 要 建立板坯连铸结晶器三维有限元热弹塑性结构模型，模拟分析铜板等效应力分布规律，并提出冷却结构优 化建议。研究表明：冷却结构和传热条件决定铜板热面特定力学行为规律，冷却结构尺寸并不改变铜板横截面应力 分布趋势。建议保证铜板耐磨性前提下，选择与铜热物性参数接近的金属材料替代镍，或在结晶器中部设计一定范 围铜镍过渡区域，以缓解应力突变；建议窄面斜深水槽上部设计加工成圆角或倒角，以削弱应力集中不利影响，弯 月面位置尤其如此。 关键词 板坯连铸 结晶器 冷却结构 铜板应力分布 有限元分析 Numerical Simulation on Effect of Cooling Structure on Stress Distribution of Copper Plates for Slab Continuous Casting Mold Meng Xiangning Wang Weiling Zhu Miaoyong (School of Materials and Metallurgy, Northeastern University, Shenyang, 110819) Abstract 3-D finite-element thermal-stress model of slab continuous casting mold is conducted to predict the equivalent stress distribution on copper plates in order to optimize cooling structure of mold. The results show that the special stress distribution of hot surface is mainly governed by cooling structure and heat-transfer conditions in mold, and the stress trend of cross-sections of copper plates is not changed with geometry of cooling structure. Under the premise of ensuring wear-resistant quality, it is wise to choose the metal with similar properties of copper to replace nickel or append a copper-nickel transition region in the middle mold, so the abrupt stress can be avoided. Also, a fillet or chamfer should be design in the upper slope water slots to release stress concentration, especially to those in meniscus, and the present design of cooling structure of mold is suitable, including slots depth and slope slots. Key words slab continuous casting, mold, cooling structure, stress distribution of copper plates, finite element analy