Abstract
During hot rolling, steel is deformed at roll bite at temperature ranging typically from 850 to 1150 °C. Under severe cyclic mechanical and thermal loads and in presence of abrasive scale, wear of rolls is inevitable. The paper reviews adverse effect of roll wear on performance of the HSM. Factors responsible for higher wear rate of rolls have been studied. Some of the cases have been discussed to show influence of roll wear on HSM parameters like campaign size of rolling, specific roll consumption, surface quality of HR coils, etc. It has been demonstrated that rate of roll wear accelerates after reaching a critical production level. Campaign size of rolling can be optimised based on acceptable crown of HR strips. Anti-wear performance of Hi-Cr rolls is much superior to that of ICDP rolls and the former is recommended for initial finishing stands. Undoubtedly, roll consumption increases with increase in roll wear and also with frequent roll changes at lower campaign sizes. However, generation of surface defects like ridge and rolled-in-scale defect could not be related directly to campaign size of rolling or with higher wear of rolls.
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Acknowledgements
Authors are grateful to the managements of HSMs for allowing various studies in the mills. Thanks are due to co-workers of the authors who directly or indirectly helped in generating roll wear data. Contributions of various researchers whose works have been referred to in this paper are thankfully acknowledged.
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Pathak, P., Das, G., Jha, S.K. (2022). Influence of Roll Wear in Hot Rolling of Steel at Hot Strip Mills. In: Kumari, R., Majumdar, J.D., Behera, A. (eds) Recent Advances in Manufacturing Processes. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-3686-8_13
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DOI: https://doi.org/10.1007/978-981-16-3686-8_13
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