Laser transformation hardening is a technology using a laser beam scanning the surface of a component. the substrate component is typicalle a steel alloy or cast iron with a carbon content between 0.2-1.5%. The irradiated compound is experiencing a quick heating and cooling cycle during which martensite formation occurs. This martensitic phase introduces a higher hardness of the surface of the steel component. this higher hardness increases the wear resistance of the component.The hardness values obtained through laser hardening is about 20% higher compared to traditional hardening techniques. The local and controlled heat-input (typical for laser processes) induces only very low deformation of the component, hence reworking of the component afterwards becomes obsolete. using laser hardening, hardening depths of 0.5-1 mmcan be obtained.Typical features for laser hardening include:

  • higher hardness compared to conventional hardening
  • low heat input
  • applicable to complex, thin walled and deformation sensitive substrates as well
  • eco friendly, using no chemicals nor quenching medium
  • no contact among hardening tool and substrate
  • typical scanninfn speeds 100-500 mm/min.
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