An analytical model for the prediction of strip temperatures in hot strip rolling

Abstract In hot strip rolling, sound prediction of the temperature of the strip is vital for achieving the desired finishing mill draft temperature (FDT). In this paper, a precision on-line model for the prediction of temperature distributions along the thickness of the strip in the finishing mill is presented. The model consists of an analytic model for the prediction of temperature distributions in the inter-stand zone, and a semi-analytic model for the prediction of temperature distributions in the bite zone in which thermal boundary conditions as well as heat generation due to deformation are predicted by finite element-based, approximate models. The prediction accuracy of the proposed model is examined through comparison with predictions from a finite element process model.

[1]  Ogawa Shigeru,et al.  Two-dimensional Thermo-mechanical Analysis of Flat Rolling Using Rigid-plastic Finite Element Method , 1991 .

[2]  Sang Moo Hwang,et al.  Dimensional Analysis of Hot Strip Rolling for On-line Prediction of Thermo-mechanical Behavior of Roll—Strip System , 2005 .

[3]  M. Pietrzyk,et al.  Thermal-mechanical modelling of the flat rolling process , 1991 .

[4]  I. V. Samarasekera,et al.  Roll-bite deformation during the hot rolling of steel strip , 1992 .

[5]  O. Zienkiewicz,et al.  A general formulation for coupled thermal flow of metals using finite elements , 1981 .

[6]  C. Yun,et al.  Investigation of thermomechanical behavior of a work roll and of roll life in hot strip rolling , 1998 .

[7]  I. V. Samarasekera,et al.  Fundamental phenomena governing heat transfer during rolling , 1993, Metallurgical and Materials Transactions A.

[8]  Taylan Altan,et al.  Computer-Aided Analysis of the Deformations and Temperatures in Strip Rolling , 1978 .

[9]  Mitsuru Kitamura,et al.  Prediction of Microstructure Distribution in the Through-thickness Direction during and after Hot Rolling in Carbon Steels , 1992 .

[10]  Sang Moo Hwang,et al.  An integrated FE process model for precision analysis of thermo-mechanical behaviors of rolls and strip in hot strip rolling , 2002 .

[11]  Y. Sekimoto,et al.  Effects of Rolling Condition on the Surface Temperature of Work Roll in Hot Strip Mill , 1975 .

[12]  Sang Moo Hwang,et al.  Precision online model for prediction of strip temperature in hot strip rolling , 2004 .

[13]  Y. H. Kang,et al.  Finite Element Analysis of Temperatures, Metal Flow, and Roll Pressure in Hot Strip Rolling , 1993 .

[14]  A. Laasraoui,et al.  Prediction of Temperature Distribution, Flow Stress and Microstructure during the Multipass Hot Rolling of Steel Plate and Strip , 1991 .

[15]  Makoto Saeki,et al.  An Integrated Mathematical Simulation of Temperatures, Rolling Loads and Metallurgical Properties in Hot Strip Mills , 1991 .

[16]  S. Choi,et al.  Temperature distribution in the roll-gap during hot flat rolling , 1992 .

[17]  Ampere A. Tseng,et al.  A Numerical Heat Transfer Analysis of Strip Rolling , 1984 .