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Shot Peening

Shot Peening

The word "shot" from "shot peening" refers to a small particle of steel while the word "peening" means using a hammer to work a metal surface. Shot peening began in the 19th century when metal workers used hammers to strengthen steel plates. Since then the process has largely been used for vehicle leaf springs.
The surface of a heat treated (quenched or carburized quenching) part is worked until hardened by projecting a hard ball onto it, which achieves a high degree of residual compression stress.
Durability and resistance to fatigue and destructibility are enhanced by improving this residual compression stress. Shot peening is also useful for improving abnormal surface layers and preventing hydrogen embitterment.
Although it is the same process, here, a distinction should be drawn between the shot blasting and sound blasting used to remove surface accretions.

The ONEX Advantage

ONEX employs impeller type shot peening machines.
By projecting a large quantity of shot particles at high speed over a wide area, we are able to use shot peening treatment for mass-produced parts from small components to large parts.
We are fully capable of presenting the best solution for improving the mechanical properties of a part, such as strength of fatigue resistance, based on our wealth of distribution data on residual stress.