Peening is a process for metal strengthening. To put it simply, surfaces are bombarded with small spherical objects, steel shots, or glass beads, and the process induces beneficial residual compressive stresses. Benefits from peening include increased durability and crack resistance.

Key features:

• Inducing Compressive Stress: With repeated impacts, a compressed surface layer occurs, which assists in resisting fatigue cracks and stress corrosion.
• Increasing Fatigue Life: Peening can enhance an object's ability to withstand cyclic loading. Objects used for cyclic loading are subjected to repeated stress, such as springs.
• Surface Hardening: The process slightly hardens the metal surface, improving wear resistance without affecting the core structure.

Peening is a very common process for the automotive, aviation, and manufacturing industries. It is often used to enhance the performance of critical parts: gears, springs, turbine blades, and structural components. Peening refines the surface and enhances crack resistance, which increases reliability and service life. New peening processes like shot peening, laser peening, and ultrasonic peening continue to advance with higher precision factors for high-performance engineering.