Ultrasonic Metal Melting Equipment - Grain Refinement

Introduction:

The finer the grain size of a metal, the larger the total interfacial area of the crystal, the more dislocations there are, and the more grains with different orientations that need to be coordinated, the higher the resistance of the metal to plastic deformation, and the higher its strength and hardness. The finer the grain size of a metal, the higher its plasticity and toughness. Because the finer the grains, the more grains there are per unit volume, and the more grains participate in deformation, the more uniform the deformation becomes, resulting in significant plastic deformation before fracture. The higher the plasticity, the greater the power consumption of the metal before fracture, and therefore the better its toughness.

In order to simultaneously improve the strength, hardness, plasticity, and toughness of metals, we need to carry out grain refinement treatment on metals, and ultrasonic metal melting equipment is undoubtedly an ideal choice.

Principle:

The cavitation effect is the only reason for grain refinement. When using ultrasonic vibration solidification method to produce castings, ultrasonic waves will generate positive and negative alternating sound pressure during propagation, forming a jet. At the same time, due to nonlinear effects, sound flow and micro sound flow will be generated. Ultrasonic cavitation will generate high-speed micro jet at the interface between solid and liquid. 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.

Advantages:

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.