The new coating system

WECODUR

The Technology

The WECODUR technology is based on the development of an advanced laser cladding process and thus enables the economic production of thin, material-bound layers on metal workpieces with a multitude of material combinations. The WECODUR process chain consists of one or more coating process steps and the final finishing process. This enables the exploitation in series production for the first time.

The WECODUR coating benchmarks

Conventional
Laser deposition welding

  • Coating rate typically ≤ 0,5 m2/h
  • Layer thickness typically ≥ 0,5 mm
  • Rough, wavy surfaces approx. Pt 200 µm
  • Surface roughness Rz ≥ 50 µm
Konventionelles Auftragsschweissen
Conclusion

Series coating uneconomical

WECODUR
laser cladding

  • Area rate up to 5 m2/h and more
  • Layer thickness down to less than 0,01 mm
  • Smooth surfaces Pt ≤ 20 µm
  • Surface roughness Rz ≤ 20 µm
Wecodur Auftragsschweissen
Conclusion

Feasible for series coating

The WECODUR finishing process

WECODUR Finishing

  • Double side face grinding enables highest process feed rates due to symmetrical force application
  • Self-sharpening surface grinding process enables lowest tool costs (dressing-free)
  • Optional peel grinding process with adjusted or plane-parallel tool set-up
Conclusion

Short machining times and low tool costs

The WECODUR technology in comparison

Disadvantages of conventional technologies

  • Thermal spraying and electroplating have no metallurgical bonding to the base material
  • For the long lasting / permanent bonding of the applied layer, elaborated pre-processing is usually necessary
  • In conventional laser material deposition, the layers are thick (> 0,5 mm) and the heat input is high

A high heat input and the associated material mixing leads to (especially in the case of substrate with high carbon content, e.g. cast iron):

  • Embrittlement in coating and base material
  • Cracks
  • Pores
  • Poor bonding