The difference between shot peening and shot blasting, sand blasting

The difference between shot peening and shot blasting

      Shot peening uses high-pressure wind or compressed air as power, while shot blasting generally uses high-speed rotating flywheel to throw steel grit at high speed. Shot blasting efficiency is high, but there will be dead ends, and shot peening is more flexible, but power consumption is large.

      Although the two processes have different injection dynamics and methods, they are all aimed at high-speed impact on the workpiece. The effect is basically the same. In comparison, the shot peening is finer and easier to control, but the efficiency is not as high as that of shot blasting. Complex small workpieces, shot blasting is more economical and practical, easy to control efficiency and cost, can control the particle size of the pellets to control the jetting effect, but there will be dead angles, suitable for batch processing of single workpieces. The choice of the two processes depends mainly on the shape and processing efficiency of the workpiece.

 The difference between shot peening and sand blasting

      Both shot peening and sand blasting use high-pressure air or compressed air as the power, and blow it out at high speed to impact the surface of the workpiece to achieve the cleaning effect, but the selected medium is different and the effect is different. After blasting, the surface of the workpiece is removed, the surface of the workpiece is slightly damaged, and the surface area is greatly increased, thereby increasing the bonding strength between the workpiece and the coating/plating layer.

      The surface of the workpiece after sandblasting is metallic, but since the surface is rough, the light is refracted, so there is no metallic luster and a dark surface.

Sandblasting and shot peening

     After the shot peening, the scale on the surface of the workpiece is removed, but the surface of the workpiece is not destroyed, and the excess energy generated during processing causes surface strengthening of the workpiece base.

     The surface of the workpiece after shot peening is also metallic, but since the surface is spherical, the light is partially refracted, so the workpiece is processed to a matt effect.