How to Correctly Select Steel Shot and Steel Grit？

　　High quality is the primary key to selecting cost-effective abrasives. We choose high-quality steel shot and steel grit to ensure more kinetic energy is applied to the workpiece surface for effective cleaning and strengthening. It also needs a sufficiently long fatigue life to reduce wear and tear during use.

　　If the steel shot and steel grit are too soft, the cleaning speed will slow down, reducing work efficiency. During shot peening, overly soft steel shot cannot generate appropriate residual stress, and the force of low-hardness steel shot cannot be compensated for by increasing impact time. If the hardness is too high, it will produce an undesirable surface appearance, increase the probability of shot breakage, lead to excessive consumption, and cause significant wear on equipment, thus increasing maintenance costs. Therefore, appropriate hardness is also important.

　　The microstructure of steel shot and steel grit should resist deformation when acting on the working surface, reducing energy loss and increasing or decreasing fatigue life. The microstructure should contain minimal brittle carbides; otherwise, the steel shot and steel grit will crack prematurely, increasing consumption.

　　Steel shot and steel grit should contain as few physical defects as possible that would lead to wear and cracking. Due to the manufacturing processes used, steel shot and steel grit will always contain some physical defects. Appropriate procedures should be implemented during production to control and reduce the proportion of defective particles.