Abstract
In the current paper, a study into the mechanism of roll thermal fatigue crack propagation during hot rolling of long products is presented. A range of 2D implicit FEM models taking into account the complex thermal and mechanical interactions during rolling and cyclic cooling have been developed and used to predict how the stress state inside the roll contributes in a different manner to energy release at the crack tip, depending on the length of the initial crack. A stress intensity factor (SIF) approach has been used to derive the crack growth rate for a given roll material and roll cooling configuration. This work describes the methodology of predicting thermal fatigue crack growth using innovative modelling techniques and highlights the importance one needs to attach to operating conditions (roll cooling, roll coating, controlling oxide scale etc.) alongside the optimum selection of roll material for reduced surface degradation of current hot long product rolls.
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REFERENCES
Molinari A, Tremea A, Peliizzari M, Biggi A and Corbo G, High speed steels for hot rolls with improved impact and thermal fatigue resistance, Materials Science and Technology, 18, Dec (2002), pp 1574 – 1581.
Chang K K, Park J I, Ryu J H, Lee S, Correlation of microstructure and thermal-fatigue properties of centrifugally cast high-speed steel rolls, Met. and Mat. Trans. A, 35A, Feb (2004), pp 481–492.
Person, A., Hogmark, S. , Bergstrom, J. , Simulation and evaluation of thermal fatigue cracking of hot work tool steel, International Journal of fatigue, 26 (2004), p 1095-1107
Malm, S., Norstrom, L.A, in Metals Sci. (1979) no 9, p. 544 -550
Stevens, P G et al., Increasing Work-Roll Life by Improved Roll Cooling Practices, JISI, 1971, pp 1-11.
Ryu, Jae Hwa, Ryu, Han-Bin, Effect of thermal fatigue property of hot strip mill work roll materials on the rolled - in defects in the ultra-low carbon steel strips, ISIJ international, vol. 43 (2003), p. 1036-139
Brechet, Y., Magnin, T., Sornette, D., The Coffin –Manson law as a consequence of the statistical nature of the LCF surface damage, Acta Materialia, vol. 40, No. 9, p.2281-2287, 1992
Lieurade, H. P., Dias, A., Giusti, J., Wisniewski, A., Experimental simulation and theoretical modelling of crack initiation and propagation due to thermal cycling, High temperature technology, vol. 8, (1990), no. 2, p. 137 -145
Lundberg, Sven-Erick, Evaluation of deterioration mechanisms and roll life different roll materials, Steel Research, 64 (1993), no. 12, p. 597-603
Pellizzari, M; Molinari, A.; Straffelini, G.: Tribological behaviour of hot rolling rolls, Lubrication and Wear 259 (2005) 7/12, 1281-1289
Perez, A et al.: Computer simulation of the thermal behaviour of a work roll during hot rolling of steel strip, J. of Process. Techn., 153-154 (2004) 894-899
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Fedorciuc – Onisa, C., Farrugia, D. Investigations into Roll Thermal Fatigue in Hot Rolling. Int J Mater Form 1 (Suppl 1), 363–366 (2008). https://doi.org/10.1007/s12289-008-0070-8
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DOI: https://doi.org/10.1007/s12289-008-0070-8