Shot peening – When Quality Matters

Add more value to your high-tech products and increase their lifetime, while protecting them against failures such as fatigue, fretting fatigue and stress corrosion cracking with our technology of shot peening.

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What is shot peening?

Shot peening is a cold working process used to produce a compressive residual stress layer and modify the mechanical properties of metals. It entails impacting a surface with shot (round metallic, glass, or ceramic particles) with a force sufficient to create plastic deformation. Peening a surface spreads it plastically, causing changes in the mechanical properties of the surface.

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Shot peening – basics: impact at high speed creates a dimple.

The main benefit of shot peening is the delay or prevention of cracks in highly tensile stressed alloy components.We can alter these undesirable manufacturing and operational tensile stresses to life enhancing residual compressive stresses therefore extending component life.

The process works by introducing the residual compressive stress in the surface of the component. The compressive stress helps to prevent crack initiation as cracks cannot propagate in the compressive environment generated by peening.

Compressive stresses are generated when the impact of each particle of shot on the component produces a small indentation. It follows that if the surface has been dented, then the material beneath the dent has been compressed. Peening generates not just one dent but many thousands over the surface. Eventually the component becomes encased in a compressively stressed layer.

The benefits of the process have been well proven, both with components operating in a highly stressed but relatively short lived environments, such as in Formula 1 motor racing and for critical parts with a much longer and more measured operating life in aero engines and structures for example.

Fields of application

for parts under extreme working loads and excessive wear

  • aircarft wing elements (
  • turbine blades
  • engine crankshafts
  • connecting rods and bearings
  • different types of springs
  • safety elements

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Advantages of the procedure:

  • reduction of the notch effet
  • augmenting tensile strenght up to 800%
  • up to 1000% longer life span

Examples of augmenting mechanical properties:

  • removing surface tension
  • higher element hardness
  • closing of suface pores

Do you need a shot-peening solution?

Call us or drop us an email to get started!

info@blasttehnik.com
+386 51 671 100