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A Numerical Study on Molten Pool Behavior and Ribbon Thickness Under Varying Casting Parameters in Planar Flow
Lijun Li1, Jianliang Sun2, Hongxin Ji2
1Advanced Technology and Materials Co., Ltd., China Iron and Steel Research Institute Group, Beijing 100081, China.
High roller speed and small nozzle slits are key for thinner amorphous alloy ribbons. This study quantifies how casting parameters like roller speed and ejection speed influence melt puddle geometry and ribbon thickness.
Area of Science:
- Materials Science
- Fluid Dynamics
- Computational Modeling
Background:
- Planar flow casting (PFC) is widely used for amorphous alloy ribbons.
- Previous 2D studies lacked systematic quantification of casting parameter influence on melt puddle geometry and ribbon thickness.
Purpose of the Study:
- To establish a coupled air-melt two-phase 2D Volume of Fluid (VOF) model.
- To systematically analyze the influence of key casting parameters on melt puddle behavior and ribbon thickness.
Main Methods:
- Developed a 2D VOF model incorporating continuity, momentum, and energy equations.
- Analyzed the effects of roller speed, ejection speed, ejection temperature, and nozzle slit width on casting outcomes.
Main Results:
- Increased roller speed (21-30 m/s) decreased detachment length (Ln) by 31% and puddle length (L) by 30%.
- Increased ejection speed (1.4-2.0 m/s), ejection temperature (1433-1733 K), and slit width (0.4-0.6 mm) significantly increased Ln (39.7-133%) and L (32.3-112%).
Conclusions:
- High roller speed, low ejection speed, and small nozzle slit width are critical for producing thinner amorphous ribbons.
- Optimizing these parameters is essential for reducing energy loss in amorphous alloy ribbons.
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