Journal of Northeastern University(Natural Science) ›› 2025, Vol. 46 ›› Issue (4): 24-32.DOI: 10.12068/j.issn.1005-3026.2025.20230317

• Materials & Metallurgy • Previous Articles     Next Articles

Numerical Simulation of Floating Morphology of Copper Alloy Strip in Air Cushion Heat Treatment Process

Hao-qiang SHI, Jia-dong LI, Peng ZHAO, Yong LI   

  1. State Key Laboratory of Digital Steel,Northeastern University,Shenyang 110819,China. Corresponding author: SHI Hao-qiang,E-mail: shihaoqiang283@163. com
  • Received:2023-11-27 Online:2025-04-15 Published:2025-07-01

Abstract:

Based on the geometric model and experimental data of the pilot air cushion furnace at Northeastern University, a fluid-structure coupling model was established to investigate the factors affecting strip floating morphology in the air cushion furnace. The results show that the model can accurately simulate the floating morphology of copper strips in air cushion furnace under different influencing factors. Air cushion pressure, strip tension, and strip thickness are the main influencing factors of strip floating morphology: the deformation of the strip will decrease or increase significantly when the air cushion pressures above and below the strip surface are changed. When the tension of thin strip is doubled, the maximum deformation near the lower and upper nozzles of the strip is reduced to 1/2 of the original value. When the thickness of the strip increases by 0.5 mm, the maximum deformation of the strip decreases significantly under the same surface air cushion pressure. The temperature in the air cushion furnace is a secondary factor. The furnace temperature is different, but the air cushion pressures on the surface and under the strip are the same, and the strip deformation is approximately the same. The numerical simulation provides a new method and idea for studying the deformation mechanism of strip suspension in air cushion furnaces.

Key words: fluid-structure coupling model, air cushion pressure, floating morphology, strip tension, strip thickness

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