1. Shot blasting size

The larger the shot blasting is, the greater the impact kinetic energy is, and the greater the shot blasting intensity is, but the coverage of shot blasting is reduced. Therefore, smaller shot blasting shall be selected as far as possible while ensuring shot blasting strength. In addition, the shot size is also limited by the part shape. When there is a groove on the part, the shot blasting diameter shall be less than half of the inner circle radius of the groove, and the shot blasting particle size is usually between 6-50 meshes.

           2. Hardness of shot blasting

When the shot blasting hardness is higher than the part hardness, the change of its hardness value will not affect the shot blasting strength. When the shot blasting is softer than the part, if the hardness value of shot blasting decreases, the shot blasting strength also decreases.

3. Shot blasting speed

When the shot blasting speed increases, the shot blasting strength also increases, but when the speed is too high, the shot blasting damage increases.

4. Injection angle

When the shot blasting jet is perpendicular to the surface to be shot blasted, the shot blasting intensity is high, so shot blasting treatment should be generally maintained in this state. If small angle shot peening is required due to the shape limitation of parts, the size and speed of shot peening shall be appropriately increased.