glossary
TiAlN coating — Industry Glossary Entry
Definition of TiAlN PVD coating for industrial blades: a violet-black high-temperature coating for hot-work and foil slitting applications.
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TiAlN coating Titanium Aluminium Nitride (TiAlN) is a PVD ceramic coating, violet-black, with excellent high-temperature hardness (HRC 60+ at 700 °C). Applied at 400–500 °C, 2–4 µm thick. The aluminium forms a stable oxide layer at high temperature that prevents the coating from breaking down.
When to use
- Foil slitting (aluminium, copper) at high speed
- Tissue slitting > 1,200 m/min
- Hot-work cutting (die casting, hot piercing)
- High-temperature applications where the edge temperature exceeds 500 °C
When NOT to use
- On impact-loaded granulator rotors (chipping)
- On food-contact cutting (colour)
- At room-temperature cutting where TiN is enough and cheaper
See also.
