(東北大學 材料與冶金學院，沈陽 110819)
摘 要: 建立板坯連鑄結晶器三維熱力耦合有限元模型，通過比較結晶器銅板寬面彎月面處橫截面的溫度、熱應力及變形分布，考察結晶器新型冷卻結構對銅板熱-力學行為的影響規(guī)律。結果表明：在彎月面處寬面熱面，新型銅板的最高溫度較傳統(tǒng)銅板的低60 ℃，最大熱應力小85 MPa，且新型銅板與傳統(tǒng)銅板最大變形分別為0.21 mm和0.29 mm；新型銅板和傳統(tǒng)銅板彎月面處寬面熱面溫度、熱應力和法向變形波動幅度分別為12 ℃和67 ℃，33 MPa和113 MPa以及0.02 mm和0.09 mm。因此，新型結構銅板溫度、熱應力和變形量分布均勻性和合理性比傳統(tǒng)的有明顯改善，更適合裂紋敏感性鋼種的澆鑄。
關鍵字: 連鑄結晶器；銅板；冷卻結構；熱-力學行為；有限元模型
（School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:A three-dimensional thermo-mechanical coupled finite element model was established, the temperature, von Mises stress and displacement distribution of new cooling structure mold were compared, the effect of the new cooling structure mold on copper plate thermo-mechanical behavior was studied. The results show that in wide hot face of copper plate at meniscus, the highest temperature and the maximum von Mises stress of new mold are 60 ℃ and 85 MPa lower than those of traditional mold, respectively. Meanwhile, the corresponding maximum norm displacements of new and traditional molds are 0.21 mm and 0.29 mm, respectively. The fluctuation range of temperature, von Mises stress and displacement of new and traditional mold at location mentioned above are 12 ℃ and 67 ℃, 33 MPa and 113 MPa, 0.02 mm and 0.09 mm, respectively. Consequently, the temperature, von Mises stress and displacement distribution of new mold copper plate are more uniform and reasonable than those of traditional mold copper plate, indicating that the new mold copper plate is more suitable for the casting of cracking sensitive steel grade than traditional mold.
Key words: continuous casting mold; copper plate; cooling structure; thermo-mechanical behavior; finite element model
