Shot Peening is a cold-working process in which the surface of a part is bombarded with small spherical media called shot. It is equivalent to a myriad of small hammer blows impinged over the entire surface indenting the surface and causing work hardening of the surface metal. Although shot peening is often confused with blasting, the two have vastly different results. Blasting is used to prepare the surface of a part for coating by removing surface contaminants. Peening is used to work-harden metal and to increase its fatigue strength. The greatest benefit to peening results from inducing compressive stresses on the surface metal which increases resistance to fatigue failures. Other benefits to shot-peening include increased resistance to corrosion fatigue, stress corrosion cracking, hydrogen assisted cracking, fretting, galling and erosion caused by cavitation.
Southwest United employs state of the art shot-peening technologies and is capable of shot peening components of diverse shapes and sizes in rigidly controlled environments. Southwest United engineers are available to assist by sharing their many years of shot peening training and experience.
View our shot peening facilities.