The well established SuperA coating known as AlTiN coating (Aluminum Titanium Nitride coating), has been developed at Guhring. By optimizing the structural, chemical and mechanical properties of the new SuperA coating are an extremely high hot hardness, very good oxidation resistance and excellent coating adhesion have been achieved. This coating is used exclusively on carbide cutting tools and is ideally suited for difficult to machine aerospace materials such as titanium alloys, Inconel as well as machining hardened steel materials (>52 HRC) and HSC applications.
| Colour | Grey violet |
| Coating process | Physical Vapour Deposition |
| Layer structure | Monolayer |
| Thickness [µm] | 1.5 - 3.0 |
| Hardness [HV 5g] | 2400 |
| Friction coefficient | 0.6 |
| Deposition temp. [°C] | 400 - 500 °C |
| Maximum operating temperature [°C] | 900 °C |
| Applications | High performance |
| Workpiece materials | Hardened steels Cast irons AIsi alloys |
Suitability
Twist drills: stainless steels, fiber-reinforced plastics
Threading tools: stainless and hardened steels, cast materials
Milling cutters: stainless steels, cast materials, fiber-reinforced plastics
Reamers: un-alloyed, alloyed and stainless steels