Abstract
In this paper, the influence of vibration parameters on twin-roll strip vibration cast-rolling is studied. Through a comparison of vibration and nonvibration cast-rolling experiments with a 7075 aluminum alloy, it is found that the mechanical vibration introduced during the cast-rolling process can refine the grains and inhibit segregation. A thermal-flow-coupled numerical simulation model of the actual twin-roll strip vibration cast-rolling process is constructed to study the time-domain characteristics and frequency-domain characteristics of the flow field and temperature field in the molten pool, and the model is verified by experiments. The simulation results show that the disturbing effect of vibrations on the flow field in the molten pool can increase the nucleation rate by promoting dendrite fusing and inhibit the segregation of alloying elements. The vibration also affects the temperature field. During vibration cast-rolling, the height of the kiss point changes sinusoidally with time. Based on an analysis of the influence of the amplitude and vibration frequency on the temperature field and flow field, the optimal vibration parameters of the vibration cast-rolling process are determined and provide a foundation for the promotion and application of the new technology of vibration cast-rolling.
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Funding
The authors would like to thank the support from the Natural Science Foundation of Hebei Province (E2017203043), the National Natural Science Foundation of China (U1604251), and the Graduate Innovation Support Program of Yanshan University (CXZS201901).
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Sun, M., Zhu, Z., Zheng, L. et al. Study on the influence of vibration parameters in the twin-roll strip vibration cast-rolling process. Int J Adv Manuf Technol 108, 3141–3157 (2020). https://doi.org/10.1007/s00170-020-05432-5
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DOI: https://doi.org/10.1007/s00170-020-05432-5