D0L:10.13374.issn1001-053x.2012.12.012 第34卷第12期 北京科技大学学。报 Vol.34 No.12 2012年12月 Journal of University of Science and Technology Beijing Dec.2012 冷却结构对连铸结晶器铜板热变形的影响 孟祥宁四 王卫领朱苗勇 东北大学材料与治金学院，沈阳110819 ☒通信作者，E-mail:mengxn@smm.neu.cdu.cn 摘要建立了板坯连铸结晶器三维有限元热弹塑性结构模型，计算了铜板变形及结晶器冷却结构对其影响规律.冷却结构 和热力载荷决定了铜板热面变形行为，铜板变形量取决于冷却结构几何参数，并在铜镍分界处有较小变形突变：宽面热面中 心线最大变形出现在弯月面下100mm处，窄面最大变形出现在弯月面和冷却水槽末端，且铜镍分界两侧变形曲线有明显的曲 率波动：铜板加厚5mm,最大中心线变形可增加0.05mm,镍层对中心线变形影响不明显，lmm的厚度变化仅在窄面引起最大 0.01mm的下降，冷却水槽对中心线变形影响也较小，水槽加深2mm,最大中心线变形减少0.02mm. 关键词连铸：结品器：变形：热分析：有限元法 分类号TF777 Effect of cooling structure on the deformation of copper plates for slab continu- ous casting molds MENG Xiang-ning,WANG Wei-ling,ZHU Miao-yong School of Materials and Metallurgy,Northeastern University,Shenyang 110819,China Corresponding author,E-mail:mengxn@smm.neu.edu.cn ABSTRACT A three-dimensional finite-element thermal-stress model of slab continuous casting molds was conducted to predict the deformation of copper plates and the effect of cooling structure on the deformation.It is found that the deformation behavior of copper plates is mainly governed by cooling structure and thermal-mechanical conditions,the deformation amount is related to the geometry of the cooling system,and a small deformation mutation occurs in the copper-nickel boundary.The maximum deformation at the hot surface centricity of the wide face locates at 100 mm below the meniscus,but that of the narrow face locates at the meniscus and the terminal of water slots.There are significant curvature fluctuations on both sides of the copper-nickel boundary of the narrow face.The maximum deformation at the hot surface centricity increases up to 0.05 mm with a thickness increment of 5mm for copper plates,and the impact is not obvious from the nickel layer and water slots:the maximum deformations are only depressed 0.01 and 0.02 mm with the increments of 1 mm nickel layer thickness and 2 mm water slot depth,respectively. KEY WORDS continuous casting:molds;deformation:thermoanalysis:finite element method 连铸钢水的凝固显热和潜热大量散失于一次冷 范围内，其仍是决定润滑、摩擦、传热和坯壳凝固等 却区，使结晶器承受巨大热负荷，并导致结晶器铜板 过程行为的关键，甚至还是锥度设计的重要依 产生弹性、塑性变形及高温蠕变，不仅因热疲劳缩短 据.因此，揭示特定温度载荷下结晶器铜板变形 结晶器使用寿命，还造成结晶器壁与初凝坯壳接触 规律并分析冷却结构参数影响对高品质钢连铸和结 状态发生变化，直接影响结晶器治金效果).尽管 晶器治金理论研究均至关重要.以往许多研究关注 受到紧固螺栓约束和冷却水冷却，这种热变形量相 凝固坯壳收缩变形6)，基于对金属凝固和裂纹形 对较小，但在弯月面渣道宽度处于10-2~10-1mm 成机理等的阐述，为冷却机制和锥度优化提供参考， 收稿日期：201109-11 基金项目：国家杰出青年科学基金资助项目(50925415)：国家自然科学基金资助项目(51004031)：高等学校博士学科点专项科研基金资助项 目(20100042120012)：中央高校基本科研业务费资助项目(N090402022)第 34 卷 第 12 期 2012 年 12 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 34 No． 12 Dec． 2012 冷却结构对连铸结晶器铜板热变形的影响 孟祥宁 王卫领 朱苗勇 东北大学材料与冶金学院，沈阳 110819  通信作者，E-mail: mengxn@ smm． neu． edu． cn 摘 要 建立了板坯连铸结晶器三维有限元热弹塑性结构模型，计算了铜板变形及结晶器冷却结构对其影响规律． 冷却结构 和热力载荷决定了铜板热面变形行为，铜板变形量取决于冷却结构几何参数，并在铜镍分界处有较小变形突变; 宽面热面中 心线最大变形出现在弯月面下 100 mm 处，窄面最大变形出现在弯月面和冷却水槽末端，且铜镍分界两侧变形曲线有明显的曲 率波动; 铜板加厚 5 mm，最大中心线变形可增加 0. 05 mm，镍层对中心线变形影响不明显，1 mm 的厚度变化仅在窄面引起最大 0. 01 mm 的下降，冷却水槽对中心线变形影响也较小，水槽加深 2 mm，最大中心线变形减少 0. 02 mm． 关键词 连铸; 结晶器; 变形; 热分析; 有限元法 分类号 TF777 Effect of cooling structure on the deformation of copper plates for slab continu￾ous casting molds MENG Xiang-ning ，WANG Wei-ling，ZHU Miao-yong School of Materials and Metallurgy，Northeastern University，Shenyang 110819，China  Corresponding author，E-mail: mengxn@ smm． neu． edu． cn ABSTRACT A three-dimensional finite-element thermal-stress model of slab continuous casting molds was conducted to predict the deformation of copper plates and the effect of cooling structure on the deformation． It is found that the deformation behavior of copper plates is mainly governed by cooling structure and thermal-mechanical conditions，the deformation amount is related to the geometry of the cooling system，and a small deformation mutation occurs in the copper-nickel boundary． The maximum deformation at the hot surface centricity of the wide face locates at 100 mm below the meniscus，but that of the narrow face locates at the meniscus and the terminal of water slots． There are significant curvature fluctuations on both sides of the copper-nickel boundary of the narrow face． The maximum deformation at the hot surface centricity increases up to 0. 05 mm with a thickness increment of 5 mm for copper plates，and the impact is not obvious from the nickel layer and water slots; the maximum deformations are only depressed 0. 01 and 0. 02 mm with the increments of 1 mm nickel layer thickness and 2 mm water slot depth，respectively． KEY WORDS continuous casting; molds; deformation; thermoanalysis; finite element method 收稿日期: 2011--09--11 基金项目: 国家杰出青年科学基金资助项目( 50925415) ; 国家自然科学基金资助项目( 51004031) ; 高等学校博士学科点专项科研基金资助项 目( 20100042120012) ; 中央高校基本科研业务费资助项目( N090402022) 连铸钢水的凝固显热和潜热大量散失于一次冷 却区，使结晶器承受巨大热负荷，并导致结晶器铜板 产生弹性、塑性变形及高温蠕变，不仅因热疲劳缩短 结晶器使用寿命，还造成结晶器壁与初凝坯壳接触 状态发生变化，直接影响结晶器冶金效果［1--3］． 尽管 受到紧固螺栓约束和冷却水冷却，这种热变形量相 对较小，但在弯月面渣道宽度处于 10 － 2 ～ 10 － 1 mm 范围内，其仍是决定润滑、摩擦、传热和坯壳凝固等 过程 行 为 的 关 键，甚至还是锥度设计的重要依 据［3--5］． 因此，揭示特定温度载荷下结晶器铜板变形 规律并分析冷却结构参数影响对高品质钢连铸和结 晶器冶金理论研究均至关重要． 以往许多研究关注 凝固坯壳收缩变形［6--7］，基于对金属凝固和裂纹形 成机理等的阐述，为冷却机制和锥度优化提供参考， DOI:10.13374/j.issn1001-053x.2012.12.012