Shot peening is a technique that consists of high-speed (as fast as 100 meters per second), repetitive propelling of steel, glass or ceramic microbeads on a metal surface, modifying its mechanical properties and producing compressive residual stress layers. Upon impact of microbeads, with each particle functioning as a ball-peen hammer, the metal modifies its structure and increases its fatigue life up to 1000%, depending on the part geometry, part material, shot material, quality, intensity and coverage.
This process is widely used in industries like aviation, aerospace and automotive to replace tensile stresses on existing units or to increase service life of components such as gearboxes, drive/crank shafts, springs and turbine blades/components. Drive components (i.e. gears) are often subjected to shot peening in order to induce compressive stress, which considerably reduces the risk of fatigue cracks during operation.
Typically, there are two types of shot peening processes:
Shot peening requires absolute accuracy and repeatability, which is guaranteed with IST’s fully automatic, universal robot shot-peening system. Our shot peeners are also designed to set process parameters such as: