Laser cladding in 3D

Laser cladding in 3D

Using high-power lasers and modern multi-axis handling systems, laser cladding systems from LASERTECH can precisely place deposits on surfaces and edges. These systems can employ CAM software tools to use 3D CAD models to produce the desired product.

About

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 applications.

Process description

In laser cladding, the laser beam is defocused on the workpiece with a selected spot size. The powder coating 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.

Technical Data

  • Diode laser with 60 W – 6.0 kW power output
  • 900-1070 nm (near infrared) wavelength
  • Robot system with 8 Axes
  • Track-mounted robot (7 axes)
  • Lathe for parts up to 7 m length and 1 tons weight (1 axis)
  • Offline programming capability

Due to its superior focusing ability, lasers allow power densities that are not typically possible with conventional thermal procedures. This enables us to process components with minimal thermal loading and distortion. Laser cladding is particularly suitable for applications demanding a high dimensional accuracy.

Additional applications include materials that are difficult to weld using conventional methods, such as high temperature-resistant nickel-based alloys in gas turbines or tungsten-carbide-filled wear-protection coatings. Typical components include turbine blades, drilling equipment, and pump components.

Сферы применения

Mass loss wear test G65

Key characteristics

  • Perfect metallurgically bonded and fully dense coatings
  • Minimal heat affected zone and low dilution between the substrate and filler material resulting in functional coatings that perform at reduced thickness, so fewer layers are applied
  • Fine, homogeneous microstructure resulting from the rapid solidification rate that promotes wear resistance of carbide coatings
  • Edge geometries can be coated and built up with welded deposits