Difference

Difference from shot blasting
Shot peening uses high-pressure air or compressed air as power, while shot peening typically involves high-speed rotation of a flywheel to eject steel sand at high speed. The shot blasting efficiency is high, but there will be dead corners, and the shot blasting is relatively flexible, but the power consumption is high.
Although the two processes have different spraying power and methods, they both aim to impact the workpiece at high speed, and their effects are basically the same. In comparison, shot blasting is more precise and easy to control accuracy, but its efficiency is not as high as shot blasting. It is suitable for small workpieces with complex shapes, and shot blasting is more economical and practical, easy to control efficiency and cost. The particle size of the shot material can be controlled to control the spraying effect, but there may be dead corners, Suitable for batch processing of workpieces with a single shape and surface.
The selection of two processes mainly depends on the shape of the workpiece and processing efficiency.
Differences from sandblasting
Both shot peening and sandblasting use high-pressure air or compressed air as power to blow it out at high speed and impact the surface of the workpiece to achieve cleaning effect, but the effect varies depending on the medium chosen. After sandblasting treatment, the dirt on the surface of the workpiece is removed, and the surface area significantly increases, thereby increasing the bonding strength between the workpiece and the coating/coating.
The surface of the workpiece after sandblasting treatment is metallic in its natural color, but due to its rough surface, light is refracted off, resulting in no metallic luster and a dark surface.
After shot peening, the dirt on the surface of the workpiece is removed, and the surface of the workpiece is kept in trace amounts, making it less likely to be damaged. The surface area has increased. Due to the fact that the surface of the workpiece is not damaged during the processing, the excess energy generated during processing will lead to surface strengthening of the workpiece substrate.
The surface of the workpiece after shot peening treatment is also of metallic natural color, but due to the spherical surface, some of the light is refracted, so the workpiece is processed in a matte effect.