At present, various technologies can be used to improve the microstructure and grain refinement of aluminum alloys. For example, there is a great correlation between the grain size of magnesium, zinc and copper and the casting temperature. However, the use of Aluminum Magnesium Ultrasonic Degassing can achieve significant improvement. There are two mechanisms contributing to this process. In the high pressure cycle of cavitation process, the collapse of bubbles leads to local high temperature and high pressure. The temperature can exceed 800 ℃ ， The pressure can exceed 400MPa; There will also be rapid cooling rates. This has two effects: many nucleation points are formed, resulting in finer grain size, and the energy generated destroys the dendritic structure that would have been formed.
Aluminum Magnesium Ultrasonic Degassing assisted industrial continuous twin roll casting machine transforms melt into aluminum strip for subsequent cold rolling operation. The process faces some challenges, especially the coarse columnar grains, chemical separation in the center of the strip, microstructure gradient and inhomogeneity. The breakthrough of industrial ultrasonic casting technology can solve these problems. In particular, the technology can greatly reduce the grain size, eliminate the central intermetallic pin and improve the uniformity. In addition, the process eliminates the need for argon degassing.
Compared with traditional methods, ultrasonic degassing and grain refinement have many advantages, which can greatly improve the performance of the final product and reduce the cost and environmental impact.
Results and application.
Improve metal homogenization, grain refinement and mixing of new alloys.
Excellent ultrasonic degassing effect (removing debris and wetting inclusions).
The microstructure and alloy properties of castings were improved.
Reduce the friction between tools (such as casting, drawing, extrusion, molding).
Improve surface treatment.
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