SURFACE SHOT PEENING

Shot Peening, also known as glass bead blasting, is an advanced surface treatment that involves bombarding the material’s surface with small beads, usually made of metal or ceramics. This process not only cleans the surface but also improves its mechanical and aesthetic properties.

The process begins with a thorough washing and degreasing of the surface to remove any contaminants. Depending on the requirements, a chemical pickling stage may follow, which further cleans the material. After these steps, the actual shot peening is performed, directing a controlled stream of beads at the surface under appropriate pressure. Finally, passivation can be applied to enhance corrosion resistance.

Shot Peening is widely used across various industries. It is commonly applied in the food, chemical, and nuclear sectors, as well as in the manufacture of stainless steel and aluminum structures. This technique is also ideal for finishing components with complex shapes — such as molds, dies, or tools — where traditional mechanical methods cannot reach.

One of the key benefits of shot peening is the enhancement of the material’s resistance to stress corrosion. The process induces a compressive residual stress layer on the surface, counteracting micro-crack formation and extending the component’s lifespan. Shot peening also enhances the surface’s visual appearance, producing a uniform, satin finish — a feature that is particularly desired for decorative components.

Compared to sandblasting, shot peening is less abrasive and does not cause material erosion. This makes it an ideal solution for delicate surfaces that require precision without risk of damage. Shot peening also prevents iron contamination, which is vital when working with stainless steel and non-ferrous metals.

Shot Peening is an effective and versatile surface treatment method that combines mechanical cleaning with improvements in both mechanical and aesthetic properties. Thanks to its unique characteristics, it is employed in a broad range of industries, helping enhance the durability and appearance of the treated products.