Ultrasonic Low-Melt Metal Equipment - Grain Refining

Introduction:

To simultaneously improve a metal's strength, hardness, plasticity, and toughness, grain refinement is essential, FUNSONIC’s ultrasonic low-melt metal processing is undoubtedly an ideal option.
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‌ As is properly known, the finer the metallic grains, the large the whole intergranular area, the extra dislocations, and the greater grains with special orientations that want to be coordinated. This will increase the metal's resistance to plastic deformation, thereby enhancing energy and hardness. The finer the grain measurement of a metal, the greater its plasticity and toughness. This is due to the fact finer grains enable for extra grains per unit volume, which in flip approves for greater grains to take part in deformation, ensuring in extra uniform deformation and larger plastic deformation earlier than fracture. Higher plasticity also means greater power consumption before fracture, resulting in greater toughness.
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Principle:

‌ Cavitation is the sole cause of grain refinement. During ultrasonic solidification, ultrasonic waves generate alternating positive and negative sound pressure levels, forming a jet. Nonlinear effects also generate acoustic streaming and micro-acoustic streaming. Ultrasonic cavitation produces high-speed micro-jets at the solid-liquid interface. The cavitation effect of ultrasonic waves in liquids can sever and destroy dendrites, impact the solidification front, and enhance stirring and diffusion, resulting in microstructure purification, grain refinement, and structural homogenization. In addition to mechanically destroying dendrites through vibration, another important effect of ultrasonic solidification is increasing the effective undercooling of the molten metal, reducing the critical nucleation radius, thereby increasing the nucleation rate and refining the grain size.

Effect:

Grain refinement: During ultrasonic solidification, ultrasonic waves generate alternating positive and negative sound pressure levels, forming a jet. Nonlinear effects also generate acoustic streaming and micro-acoustic streaming. Ultrasonic cavitation produces high-speed micro-jets at the solid-liquid interface. The cavitation effect of ultrasonic waves in liquids can cut and destroy dendrites, impact the solidification front, and increase the stirring and diffusion effect, which can achieve the effects of purifying the structure, refining the grains, and making the structure uniform. In addition to the mechanical action caused by vibration to destroy dendrites, another important role of ultrasonic vibration solidification is to increase the effective supercooling of the metal liquid and reduce the critical nucleus radius, thereby increasing the nucleation rate and refining the grains.

Advantages:

1.High-temperature resistance—Can withstand temperatures up to 800°C
2.Corrosion-resistant—Uses high-strength titanium alloy tool heads
3.Effective—Micromolecular interaction creates direct and noticeable results
4.Easy installation—Connects to standard flanges, eliminating the need to modify existing production equipment or processes.