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Finite Element Analysis of Thermal Stresses on a Hearth Roll Surface Depending on Changes in the Neck Shape
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  • Journal title : Transactions of Materials Processing
  • Volume 25, Issue 3,  2016, pp.169-175
  • Publisher : The Korean Society for Technology of Plasticity
  • DOI : 10.5228/KSTP.2016.25.3.169
 Title & Authors
Finite Element Analysis of Thermal Stresses on a Hearth Roll Surface Depending on Changes in the Neck Shape
Na, D.H.; Lee, Y.;
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 Abstract
The hearth roll, which transfers the cold-rolled strip sheet in a Continuous Annealing Line (CAL), is always subjected to changes in the surface temperature and subsequently experiences thermal stress in service. These variations lead to the generation of thermal cracks on the hearth roll surface as well local plastic deformation. We performed finite element analysis to predict the thermal stress changes on the hearth roll surface and designed the collar shape of the hearth roll to minimize these thermal stresses. Results show that the hearth roll with a collar having an obtuse angle is much more effective than a hearth roll with collar having a right angle when the tangential stress, which is one of main causes leading to surface cracks, is compared for the various conditions. It was found that the tangential stress and the temperature on the surface of hearth roll can be reduced by 51.9% and 26℃ if the shape of roll on collar is re-designed.
 Keywords
Continuous Annealing Line;Hearth Roll;Thermal Stress;Finite Element Analysis;
 Language
Korean
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