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Laser Cladding is a weld build-up process and a complementing coating technology to thermal spray. It is increasingly used instead of PTA (Plasma Transferred Arc) welding and easily outperforms conventional welding methods like TIG (Tungsten Inert Gas) for advanced weld repair and highly reproducible applications.

Key benefits of this process
  • Metallurgical bonded and fully dense coating structures 
  • Minimal heat affected zone and low dilution between the substrate and filler material compared to other weld overlay technologies resulting in coatings that perform at reduced thickness 
  • Fine, homogeneous microstructure resulting from the rapid solidification rate that promotes high wear resistance of carbide coatings 
  • Edge geometries can be coated and built up with very localized overlay deposits 
  • Near net-shape weld build-up requires little finishing effort 
  • Excellent process stability and reproducibility because it is numerical controlled welding process 
Typical applications
  • Dimensional restoration 
  • Wear and corrosion protection 
  • Laser additive manufacturing 
Process description

In laser cladding, the laser beam is defocused on the workpiece with a selected spot size. The powder feedstock material is carried by an inert gas through a powder nozzle into the melt pool. The laser optics and powder nozzle are moved across the workpiece surface to deposit single tracks, complete layers or even high-volume build-ups in so-called high speed laser cladding setup

Process basics
  • Heat source: laser 
  • Feedstock: weldable powders (metals, metallic alloys, carbide blends) 
  • Typical laser power: 1 – 6 kW 
  • Typical build up rate: 0.1 to 12 kg/h (0.2 to 26.5 lb/h) 
  • Typical deposit thickness: 0.2 to 4 mm (0.008 to 0.157 in) 

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