Abstract
Hot rolling is performed inside a heating furnace where the material is heated above its recrystallization temperature. As pinch rolls are located in this furnace and subjected to continuous high temperature, they are typically cooled with water to protect them from the harmful effects of the high atmospheric temperature. Despite cooling, cracks can develop on the surface of water-cooled rolls, which can result in fracture over time; further, high-temperature oxidation can cause the metal strip to stick to the roll, resulting in defects on the strip surface. To address these problems, we analyzed pinch rolls through mechanical stress, thermal stress, and high-temperature oxidation investigations with data measured from a production line in situ. Subsequently, solutions for improving the performance of the pinch rolls predicted from the calculations were applied to an actual hot rolling process.
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This work was supported by a Korea Institute for Advancement of Technology grant, funded by the Korea Government (MOTIE) (P0002019), as part of the Competency Development Program for Industry Specialists.
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Recommended by Associate Editor Tae June Kang
Yong-Joon Lee is a doctoral candidate at the Department of Materials Science and Engineering, Seoul National University, Seoul, Korea. He received his B.S. in Materials Science and Engineering from Korea University, Seoul, Korea and his M.S. in Materials Science and Engineering from Seoul National University. He is currently a project leader at POSCO.
Kyung-Woo Yi is a Professor at the Department of Materials Science and Engineering, Seoul National University, Seoul, Korea. His doctorate is from Seoul National University.
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Lee, YJ., Yi, KW. Alleviation of high-temperature oxidation and cracking of water-cooled roll for hot-rolling steel. J Mech Sci Technol 33, 5787–5796 (2019). https://doi.org/10.1007/s12206-019-1125-0
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DOI: https://doi.org/10.1007/s12206-019-1125-0