Shot Peening

Shot peening is a method of cold working the surface of a metal components by the impact of a stream of spherical particles. The shot is propelled at the components surface by means of air or discharged by centrifugal force from an impeller wheel. When the shot particles strike a components surface, they cause the surface to plastically deform, with hammer head like impressions into the surface.

ABOUT THE SERVICE

IST’s shot peening service is unique - it is one of its kind, dedicated specifically to enhancing the fatigue performance of springs.  Over 40 years of research and experience of shot peening spring and non-spring components ensures that we use the optimum process parameters to achieve the best performance for your springs.

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THE BENEFITS

• Improves the life of the component

• Improves compressive stresses

• Removal of burrs and metal flashing

• Removal of scale

• Reducing the risk of surface cracks

Our service includes steel, glass and ceramic media, spring wire / section sizes from 0.3mm (0.012″) upwards plus full technical back-up all rigorously quality controlled to ISO 9001. Our post peening services include:

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• Low temperature heat treatment

• Temporary corrosion protection

• Pre-stressing to stablise dimensions

• Acid dip and passivation for stainless steel springs

• Fatigue testing to validate the efficiency of the shot peening process

• Duplex peening and strain peening available for suitable applications

Goodman diagrams showing the benefits of shot peening, with the life of the spring in its as-received condition expected to achieve 100,000 cycles in comparison to a shot peened spring exceeding 10,000,000 cycles.