An integrated thermal model of hot rolling

During the heavy plate rolling process, different production steps, i.e., roll passes, descaling passes, and air cooling periods, influence the temperature evolution of the plate. All these relevant aspects are covered by a one-dimensional thermal model proposed in this paper. Experiments were conducted in a rolling mill under realistic rolling conditions to parametrise and validate the model. Using pyrometer measurements, a simple model adaption strategy is developed, which can cope with uncertainties in the initial temperature profile. The model provides accurate predictions of the temperature evolution of the plate during the whole rolling process from the plate’s exit of the furnace to the last pass. Thus, it can be used for scheduling the production process. Based on the model, an observer can be designed.

[1]  Sumitesh Das,et al.  A Probabilistic Approach to Model Interfacial Phenomena during Hot Flat Rolling of Steels , 2006 .

[2]  Siamak Serajzadeh,et al.  Prediction of temperature distribution in the hot rolling of slabs , 2002 .

[3]  S. X. Zhou,et al.  An integrated model for hot rolling of steel strips , 2003 .

[4]  I. V. Samarasekera,et al.  The thermal and metallurgical state of steel strip during hot rolling: Part I. Characterization of heat transfer , 1991 .

[5]  P. Wide,et al.  Finding a representative emissivity value by using grey box technique , 2003, Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412).

[6]  I. V. Samarasekera,et al.  The thermal and metallurgical state of steel strip during hot rolling: Part II. Factors influencing rolling loads , 1991 .

[7]  J. M. Coulson,et al.  Heat Transfer , 2018, A Concise Manual of Engineering Thermodynamics.

[8]  I. V. Samarasekera,et al.  Mathematical modelling of heat flow and deformation during rough rolling , 1993 .

[9]  M. J. Wheeler.  Heat and Mass Transfer , 1968, Nature.

[10]  W. Rohsenow,et al.  Nucleate pool-boiling heat transfer. I: review of parametric effects of boiling surface , 2004 .

[11]  Terry Sheppard,et al.  Prediction of temperature evolution by FEM during multi-pass hot flat rolling of aluminium alloys , 2001 .

[12]  Siamak Serajzadeh,et al.  Modelling the work-roll temperature variation at unsteady state condition , 2003 .

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

[15]  Rafael Colás,et al.  A model for heat conduction through the oxide layer of steel during hot rolling , 2000 .

[16]  M. N. Özişik,et al.  Finite Difference Methods in Heat Transfer , 2017 .

[17]  Jonas Lagergren.  Friction evaluation in hot strip rolling by direct measurement in the roll gap of a model duo mill , 1997 .

[18]  Andreas Kugi,et al.  Modelling and experimental model validation for a pusher-type reheating furnace , 2009 .

[19]  J. W. Thomas.  Numerical Partial Differential Equations: Finite Difference Methods , 1995 .

[20]  M. Lebouché,et al.  Controlled cooling of a hot plate with a water jet , 2002 .

[21]  J. Meseguer,et al.  Thermal radiation heat transfer , 2012 .

[22]  Rafael Colás,et al.  Modelling heat transfer during hot rolling of steel strip , 1995 .

[23]  Jong Wook Choi,et al.  Convective Heat Transfer Coefficient for High Pressure Water Jet , 2002 .

[24]  J. W. Thomas.  Numerical Partial Differential Equations , 1999 .

[25]  Siamak Serajzadeh,et al.  Modelling the temperature distribution and microstructural changes during hot rod rolling of a low carbon steel , 2002 .

[26]  Hiroshi Nishimura,et al.  Analysis of Slab Temperature Change and Rolling Mill dine Length in Quasi Continuous Hot Strip Mill Equipped with Two Roughing Mills and Six Finishing Mills , 1981 .

[27]  J. K. Brimacombe,et al.  Heat transfer in the hot rolling of metals , 1995 .

[28]  A. Kugi,et al.  A mathematical model of a slab reheating furnace with radiative heat transfer and non-participating gaseous media , 2010 .

[29]  Chun-Hui Luo,et al.  Modeling the frictional boundary conditions in a rolling process , 1996 .

[30]  Jing Wang,et al.  Study on film boiling heat transfer for water jet impinging on high temperature flat plate , 2001 .

[32]  M. P. Phaniraj,et al.  Thermo-mechanical modeling of two phase rolling and microstructure evolution in the hot strip mill - Part I. Prediction of rolling loads and finish rolling temperature , 2005 .

[33]  K. Spitzer,et al.  Effect of oxide layers on spray water cooling heat transfer at high surface temperatures , 2008 .

[34]  Ampere A. Tseng,et al.  Macro- and micro-modelling of hot rolling of steel coupled by a micro-constitutive relationship , 1995 .

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

[36]  Frank P. Incropera,et al.  Local jet impingement boiling heat transfer , 1996 .

[37]  R. Scholz,et al.  Measurements of spray water cooling heat transfer coefficients under oxide scale formation conditions , 2006 .

[38]  Zone-Ching Lin,et al.  Three-dimensional heat-transfer and thermal-expansion analysis of the work roll during rolling , 1995 .

[39]  Yanagi Kenichi.  Prediction of Strip Temperature for Hot Strip Mills , 1976 .

[40]  C. M. Sellars,et al.  Physical simulation of interfacial conditions in hot forming of steels , 2009 .

[41]  Yasuo Sugitani,et al.  Heat Transfer in Spray Cooling on Hot Surface , 1979 .

[42]  C. G. Sun,et al.  Prediction of Roll Thermal Profile in Hot Strip Rolling by the Finite Element Method , 2000 .