Stork Turbo Blading uses laser cladding to improve erosion protection

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Stork Turbo Blading uses laser cladding to improve erosion protection

Stork has invested in laser cladding equipment to increase the lifespan of steam turbine blades. The implementation of erosion shields on leading edges makes blades more durable and decreases risk of failure.

    

One of our customers has requested that Stork applies erosion protection to the leading edges of a steam turbine type blade. Within Stork Turbo Blading  we have the knowledge and know-how to increase the lifespan of your steam turbine components, and decrease risk of failure.

Laser cladding is a form of fusion welding, used to bond several different metals together. The process uses a metallic powder such as cobalt, which melts locally when a laser is activated at the designated geometrical location. As a result, a layer of a different kind of metal is applied locally, with different mechanical properties such as hardness, tensile strength etc. wherever these properties are desired.

Stork Turbo Blading utilizes this state of the art technique to increase the longevity of turbo machinery components such as erosion protection of steam turbine blades and repair of turbine casings. Due to Stork’s manufacturing speed and flexibility, the process can be applied to many different components, according to customer specifications and within a limited timeframe.

ABSOLUTE PROCESS CONTROL

Stork’s laser cladding process can be accurately controlled by adjusting the desired parameters such as laser intensity, directional movements and layer thickness. For example, for Steam Turbine Blades a Cobalt-Chromium material (Stellite 6) is used to apply several millimeters at the designated location. The layer thickness can be adjusted to meet the desired specifications so they comply with the customer’s specification.

ADVANTAGES OF LASER CLADDING

Laser cladding has various benefits, which include:

  • Optimal process control
  • Adjustable Layer thickness
  • High accuracy
  • Fast repair times
  • 100% metallic adhesion
  • Minimal dilution with the base metal
  • Less heat input and distortion compared to welding
  • Better mechanical properties compared to traditional stellite brazing

DRAWBACKS OF LASER CLADDING

  • More heat in base material compared to traditional stellite brazing
  • Deformation needs to be controlled, strongly dependent on base material
  • More expensive in compared to traditional stellite brazing

IN CONCLUSION

Stork has and continues to invest in experience regarding erosion protection methods for turbo machinery components, and strives to implement the most high-tech production methods to ensure high product quality, good service and fast delivery times. Laser cladding is a welcome addition to our portfolio, as the process itself contributes to longevity and an increased product lifespan.

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