About Laser Cladding

Principle

The process consists of using the energy of a laser beam to melt deposition powder (Ni-Cr or other material) on the part.  A weld occurs between the deposit and the base metal.

Benefits

The cast pheres exhibit hardness 3000 =/- 500 HV, and they pack together to produce a dense deposit. Having the spherical shape of the deposit increases the overall strength of the carbide grain as well as the deposit.

  • Cast tungsten because of it's high melting point is not affected by the energy of the laser.
  • High hardness 3000 HV +/- 500
  • Cast tungsten carbide are not by the lasercarb
  • Low heat affected zone
  • Almost total absence of porosity
  • Limited cracking and deformation
  • Large deposit thickness of 0.020" to 0.125" (0.5 to 3 mm)
  • Metallurgical bond
  • Precision, Automation, Reproducability


Primary Applications

  • Drilling components (wear band, stabilizer, drill collar....)
  • Tunnel boring
  • Pump ring and shaft
  • Wear parts in the agri-food industry
  • Paper industry
  • Ceramics industry
  • Foundries
  • Cylinders and rollers in the steel industry

Hardness Profile vs Power & Speed

  • At a given speed, the higher the power, the deeper the hardening and the harder it gets
  • Higher speed at a given power means higher hardness and penetration
  • Lower speed at a given speed means lower hardness and penetration
  • Power stability of diode laser -> good reliability of hardness profiles
  • No use of paint nor absorbing layer

Laser Hardening Process

  • Diode Laser
  • CNC controlled process gives the ability to continuously adjust the power in real time
  • No absorbing layer required prior to hardening