Ultrasonic Metal Melting Equipment - Used for Casting
Introduce:
The ideal ingot structure is one with uniform and fine equiaxed grains on the entire cross-section of the ingot. This is because equiaxed grains have low anisotropy, uniform deformation during processing, excellent performance, and good plasticity, which is conducive to casting and subsequent plastic processing. The most ideal method to obtain such an organization is currently to use ultrasonic metal melt equipment to refine the melt through ultrasonic treatment.
Principle:
Ultrasonic metal solution equipment can act on crystallizers to improve the surface quality of castings. Ultrasonic vibration of the crystallizer can be used for small billets, large billets, and slabs, without negative sliding when using ultrasonic vibration. When casting small and large billets, applying ultrasonic vibration to the crystallizer can result in a very smooth casting surface.
Effect:
1. Removing impurities: It is very difficult for tiny inclusions in metal melt to float up, and only when they gather together will it make floating easier. Using ultrasonic metal melt equipment to add ultrasonic waves to the solution, ultrasonic standing waves can successfully stratify and aggregate the inclusion powder in the metal melt, thereby causing it to float up.
2. Degassing: Ultrasonic waves have a significant effect on the removal of gases from metal melt, and the elastic vibration of ultrasonic waves can completely degas the metal melt within a few minutes. When ultrasonic vibration is introduced into a molten metal, cavitation occurs due to the rupture of the continuity of the liquid phase, resulting in the formation of voids and the concentration of gases dissolved in the molten metal. The elastic vibration of ultrasonic waves promotes the generation of bubble cores and causes them to continuously grow until they reach a size that can be smoothly discharged from the molten metal.
3. Improving the quality of castings: Ultrasonic metal solution equipment can act on crystallizers to improve the surface quality of castings. Ultrasonic vibration of the crystallizer can be used for small billets, large billets, and slabs, without negative sliding when using ultrasonic vibration. When casting small and large billets, applying ultrasonic vibration to the crystallizer can result in a very smooth casting surface.
4. Grain refinement: During the production of castings using ultrasonic vibration solidification method, ultrasonic waves generate positive and negative alternating sound pressure during propagation, forming a jet. At the same time, due to nonlinear effects, acoustic and micro acoustic flows are generated. Ultrasonic cavitation generates high-speed micro jets at the interface between solids and liquids. The cavitation effect in ultrasonic liquids can cut and destroy dendrites, impact the solidification front, increase stirring and diffusion effects, and achieve purification of tissues, refinement of grains, and homogenization of tissues. In addition to the mechanical damage caused by vibration, another important role of ultrasonic vibration solidification is to increase the effective undercooling of the metal liquid, reduce the critical nucleation radius, thereby increasing the nucleation rate and refining the grains.
Advantage:
1. High temperature resistance - can withstand temperatures up to 800 ℃
2. Corrosion resistance - using high-strength titanium alloy tool heads
3. Good effect - direct and significant interaction between micro molecules
4. Easy to install - through standard flange docking installation, there is no need to change existing production equipment and process flow.
