Laser hardening is a method of heating the material surface. In laser hardening using DDL, it is possible to quench a very small and narrow areas by selecting the focused beam size. This makes it possible to reduce distortion and achieve high-quality hardening.
Focused beam pattern and profiles (example)
・DDL (top-hat beam shape)
・Fiber output laser (gaussian beam shape)
Thermal image during hardening
・Fiber output laser
The table below compares laser hardening with induction hardening. Induction hardening is method of hardening by heating the surface of material by causing electromagnetic induction with high-frequency electromagnetic waves.
|Laser hardening||Induction hardening|
|Coil (jig)||Not required||Dedicated coil is required for each product|
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