Ultrasonic Degassing, Grain Refinement, Micro-Alloying in Molten Aluminium, Zinc, Magnesium, Brass, Bronze, Copper, Glass and Steel.
Ultrasonic degassing & grain refinement of metal melts up to 1,800 ° C, can substantially improve the properties of castings, in particular, their microstructure and mechanical properties. Recently, new refinements to the technique using proprietary ultrasound technology provide significant benefits to industrial continuous casting, offering an alternative to argon degassing, replacement of standard master alloy additives, and substantial improvements to microstructure.
Here we will look at the mechanisms that underlie ultrasonic liquid metal interactions, in particular how they apply to ultrasonic degassing and grain refinement. Finally, we will look briefly at our ultrasonic technology as applied to industrial continuous casting.
Various techniques are available for enhancing the microstructure of aluminium alloys, for instance, there is a strong correlation between grain size and casting temperature; however, significant improvements can be achieved using ultrasonic treatment. Two mechanisms contribute to this process.
During the high-pressure cycle of the cavitation process, collapsing bubbles result in localised high temperatures and pressures. Temperatures can exceed 1000 K while pressures can exceed 400 MPa; rapid cooling rates also occur. The effects of this are twofold: many nucleation sites are formed inducing finer grain sizes, and the energies generated destroy dendritic structures that would otherwise form.
Global Specialists in Ultrasonic degassing in molten metals and glass!
With our new generation of high power NIMA ultrasonic generators, we are now able to treat large volumes of molten aluminium, magnesium, glass and other ferrous melts up to 1800 degrees Celsius. It is all about the choice of our next generation low frequency generator AND a new generation of in-house developed ceramics with non-wetting properties with a very high Young’s Modulus Elasticity!
What makes us unique?
- Twenty years of software development has been invested to create the first generation of powerful ‘no-standing-waves’ series of NIMA generators. Only our technology is able to treat large volumes of molten metals and glass.
- The combination with a proprietary ceramic sonotrode makes us unique as we now can treat large volumes.
World's Leaders in Industrial Ultrasonic Degassing & Grain Refinement!
Our worldwide presence ensures the timeliness, cost efficiency and compliance adherence required to ensure your production timelines are met.