An integrated mathematical model is proposed to predict the velocity field and strain distribution during multi-pass plate hot rolling. This model is a part of the mixed analytical-numerical method （ANM） aiming at predic- tion of deformation variables, temperature and microstructure evolution for plate hot rolling. First a velocity field with undetermined coefficients is developed according to the principle of volume constancy and characteristics of metal flow during rolling, and then it is solved by minimizing the total energy consumption rate. Meanwhile a thermal model coupling with the plastic deformation is exploited through series function solution to determine temperature distribution and calculate the flow stress. After that, strain rate field is calculated through geometric equations and strain field is derived by means of difference method. This model is employed in simulation of an industrial seven pass plate hot rolling process. The velocity field result and strain field result are in good agreement with that from FEM simulation. Furthermore, the rolling force and temperature agree well with the measured ones. The compari- sons verify the validity of the presented method. The calculation of temperature, strain and strain rate are helpful in predicting microstructure. Above all, the greatest advantage of the presented method is the high efficiency, it only takes 12 s to simulate a seven-pass schedule, so it is more efficient than other numerical methods such as FEM.
参考文献
| [1] | Kim J;Lee J;Hwang S M .An Analytical Model for the Pre diction of Strip Temperatures in Hot Strip Rolling[J].International Journal of Heat and Mass Transfer,2009,52(7/8):1864. |
| [2] | 刘才,崔振山.板材热轧热力耦合有限元模拟[J].机械工程学报,1998(04):35-39. |
| [3] | Vladimir Panjkovic .Model for prediction of strip temperature in hot strip steel mill[J].Applied thermal engineering: Design, processes, equipment, economics,2007(14/15):2404-2414. |
| [4] | Reza R;Siamak S .Three-Dimensional Modelfor Hot Rolling of Aluminum Alloys[J].Materials & Design,2007,28(08):2366. |
| [5] | Z.Y.Jiang;A.K.Tieu .A simulation of three-dimensional metal rolling processes by rigid-plastic finite element method[J].Journal of Materials Processing Technology,2001(1):144-151. |
| [6] | Kazutake Komori .Simulation of deformation and temperature in multi-pass three-roll rolling[J].Journal of Materials Processing Technology,1999(0):450-457. |
| [7] | 肖宏,谢红飚,毕恩复.板带热连轧过程力能参数、温度和组织变化的预报[J].钢铁,2003(09):35-38. |
| [8] | Jang Y S;Ko D C;Kim B M .Application of the Finite Ele- ment Method to Predict Microstructure Evolution in the Hot Forging of Steel[J].Journal of Materials Processing Technology,2000,101(01):85. |
| [9] | 张金玲,崔振山,王英杰.中厚板多道次热轧过程有限元连续模拟[J].上海交通大学学报,2009(01):65-70. |
| [10] | Hassan Sheikh .Thermal analysis of hot strip rolling using finite element and upper bound methods[J].Applied mathematical modelling,2009(5):2187-2195. |
| [11] | Serajzadeh S;Mahmoodkhani Y .A Combined Upper Bound and Finite Element Model For Prediction of Velocity and Tem- perature Fields During Hot Rolling Process[J].International Journal of Mechanical Sciences,2008,50:1421. |
| [12] | CUI Zhen-shan;ZHANG Jin-ling;LIU Juan .An Mixed Ana- lytical-Numerical Modeling for Plate Under Hot Rolling-Part I..Temperature Model[OL].http://www,paper,edu.cn/ inder php/default/releasepaper/content/200901 662 |
| [13] | 张金玲,崔振山,胡宏勋.多道次中厚板热轧过程的综合数值解析法模拟[J].上海交通大学学报,2008(01):32-36. |
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