Study on the influence of vibration parameters in the twin-roll strip vibration cast-rolling process

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...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2020-06, Vol.108 (9-10), p.3141-3157
Main Authors: Sun, Minghan, Zhu, Zhiwang, Zheng, Likang, Guo, Shipeng, Du, Fengshan
Format: Article
Language:English
Subjects:
Alloying elements
Aluminum base alloys
CAE) and Design
Computer simulation
Computer-Aided Engineering (CAD
Dendritic structure
Engineering
Industrial and Production Engineering
Mathematical models
Mechanical Engineering
Media Management
New technology
Nucleation
Original Article
Parameters
Strip
Temperature distribution
Thermal simulation
Vibration
Vibration analysis
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Summary: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.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-020-05432-5