Since the 30's of shot peening technology in twentieth Century. In the car on the drive shaft, has greatly improved the fatigue strength of the car, the surface treatment technology began to develop rapidly. Today, the valve spring of each car motor must pass through shot peening, although some will be slightly loss of shot peening surface material, but it ensures that the motor service life. This according to the need of using ordinary local material quality surface to improve the processing methods, the special properties of metal materials is very common.

At present, people of high quality ceramic materials are not shot peening optimization process, because the conventional shot peening can cause this ceramic material brittle fracture, which also shows that the fracture is not because of low intensity caused by. Compared with the metal, ceramic materials have essentially deformation and fracture properties of completely different, overload ceramics will suddenly fracture. On the surface, like shot peening process would only result in brittle ceramic damage, because in the shot peening process should not only make the surface of ceramic parts of local deformation, also can't let it break, it seems to be difficult to get the best of both worlds.