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Heat transfer in the hot rolling of metals

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Abstract

The heat-transfer coefficient (HTC) in the roll gap during the hot rolling of AA5XXX-series (aluminum-magnesium) alloys has been measured in a laboratory mill with the aid of thermocouples attached to the surface and embedded in the interior of test samples. The heat-transfer coefficient was calculated from the sample temperature response using an implicit finite-difference model over a range of temperatures, strain rates, and pressures. Values of 200 to 450 kW/m2 °C were obtained by backcalculation. A comparison of the results from this study with those measured in a previous investigation on two steel alloys has led to the development of an equation which characterizes the HTC as a function of the ratio of the rolling pressure to the flow stress at the surface of the workpiece. This relationship has been employed to explain the apparent differences in the heat-transfer behavior of different metals at similar rolling pressures.

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Authors and Affiliations

  1. The Centre for Metallurgical Process Engineering, The University of British Columbia, V6T 1Z4, Vancouver, BC, Canada

    C. O. Hlady (Research Engineer), J. K. Brimacombe (Alcan Chair in Materials Process Engineering and Director), I. V. Samarasekera Professor & E. B. Hawbolt Professor

  2. the Department of Metals and Materials Engineering, The University of British Columbia, V6T 1Z4, Vancouver, BC, Canada

    C. O. Hlady (Research Engineer), J. K. Brimacombe (Alcan Chair in Materials Process Engineering and Director), I. V. Samarasekera Professor & E. B. Hawbolt Professor

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  1. C. O. Hlady
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  2. J. K. Brimacombe
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  3. I. V. Samarasekera Professor
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  4. E. B. Hawbolt Professor
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Hlady, C.O., Brimacombe, J.K., Samarasekera, I.V. et al. Heat transfer in the hot rolling of metals. Metall Mater Trans B 26, 1019–1027 (1995). https://doi.org/10.1007/BF02654104

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  • DOI: https://doi.org/10.1007/BF02654104

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