During laser hardening, a workpiece is usually partly heated up using high power lasers in the multi kilowatt range. Because of the local absorption of heat and the high thermal conductivity of the metal, one achieves high quenching speeds, which in turn result in high levels of hardness.
Warpage of the workpiece is therefore comparatively low compared to induction heating because of the low amount of heat that is induced. As a result, only minimum rework is usually required and experience has shown that a lower hardness penetration depth is necessary than for induction hardening.
Precise process control is important in order to achieve optimum hardness. The temperature during the hardening process is precisely controlled and recorded using the LASCON® system. There are no excess temperatures along critical edges.
- Minimum heat absorption
- Little warpage
- Subassemblies can be hardened nicely in specific areas
- Low rework required
- High level of hardness