Prediction of Work-Piece Constitutive Equation in Hot Rolling of Strip

Document Type: Persian

Authors

1 M.Sc. Student, Chemical and Materials Engineering Department, University of Alberta, Edmonton, Canada.

2 M.Sc. Student, Mechanical Engineering Department, University of Calgary, Calgary, Canada.

3 Assistant Professor, Dept. of Industrial and Manufacturing Engineering, Wichita State University, Wichita, Kansas, USA

Abstract

Dimensional control of the work-piece in steel industry is of important interest. The main aspects in overcoming the thickness control are variations in material strength due to variations in chemical composition, work-piece temperature, reduction and the strain rate applied to the work-piece. In this paper based on the main parameters affecting the rolling force an attempt been made to give a more accurate prediction for the flow stress in a steel rolling finishing mill. Predicted values of the model are compared with those of the experimental values which are shown to be in good agreements

Keywords


[1] Anderson J.G., Evans R.W., Modeling flow stress evolution during elevated temperature deformation of two low carbon steels, Iron making and Steelmaking, Vol. 23(2) 1996, pp. 130-135.

[2]   Avrami M., Kinetics of phase change: I. General theory, J. Chemical Physics, Vol.7, 1939, pp. 1103-1112.

[3] Roberts W.L., Hot rolling of steel, Marcel Dekker Inc., New York, 1983.

[4]  Mohamed F.A., Langdon T.G., The transition from dislocation climb to viscous glide in creep of solid solution alloys, Acta Metallurgic, Vol. 22 (6), 1974, pp. 779-788.

[5]     Frost H.J., Ashby M.F., Deformation Mechanism Maps, Pergamon Press, Oxford, 1982.

[6]    Park J. , Prediction of the flow stress and grain size of steel during thick-plate rolling, J. Materials Processing Technology, Vol. 113
(1-3), 2001, pp. 581-586.

[7]  Xu G., Wan L., Zhang X., Xue Z., Study on flow stress model of a micro alloyed high strength steel in CSP hot rolling, Materials Science Forum, PART 1, 2008, pp. 267-272 

[8]  Zener C., Hollomon H., Effect of strain rate upon plastic flow of steel, J .Applied Physics, Vol. 15 ,1944, pp.22-28.

[9]   Sellars C.M., Basics of modeling for control of microstructure in thermo- mechanical controlled processing, Iron making and steelmaking, Vol. 22 (6), 1995, pp. 459-464.

[10]   Wang S.R., Tseng A.A., Macro and Micro Modeling of Hot Rolling of Steel Coupled by a Micro Constitutive Relationship, Iron and Steelmaker, (I and SM) 23, 1996.

[11]                         Zheng C., Xiao N., Li D., Li Y., Microstructure   prediction of the austenite  recrystallization during multi-pass steel strip hot rolling: A cellular automaton modeling, Computational Materials Science, Vol. 44 (2), 2008, pp. 507-514.

[12] Inouye K., Studies on the hot working
strength of steels. Tetsu to Hagane,Vol. 41,  
1955, pp593-607.

[13]  Gunasekera J.S., Alexander J.M., Analysis of Rolling, CIRP Annals – Manufacturing Technology, Vol. 36 (1), 1987, pp. 203-206.

[14] Freshwater I.J., Simplified theories of flat rolling- I. The calculation of roll pressure, roll force and roll torque, Int. J. Mechanics. Science, Vol.38 (6), 1996, pp. 633-648.

[15]  Hitchcock H., Roll neck bearings, New York. App. I. ASME, 1935.

[16]  Kaplanov V. I. , PrisyazhnyiA. G., Simulation of contact friction in the hot rolling of steel sheet, Steel in Translation, Vol. 38(9), 2008, pp.714-718.