What are the differences between AlTiN, TiAlN, TiSiN, and nACo coatings?
These coatings differ primarily in hardness, oxidation temperature, friction coefficient, and visual color. For instance, nACo offers the highest hardness of 42 GPa and can withstand temperatures up to 1200°C, making it optimal for heavy-duty and high-speed machining, while AlTiN and TiAlN are excellent standard solutions for high-temperature and general milling applications.
Which coating is best suited for dry and high-temperature machining?
nACo and TiSiN coatings are highly recommended for dry and high-temperature operations. nACo can withstand oxidation temperatures up to 1200°C, and TiSiN can withstand up to 1000°C, ensuring great thermal stability and prolonged tool life without liquid coolants.
How does the friction coefficient impact machining performance?
A lower friction coefficient (such as 0.3 for AlTiN and TiAlN) reduces the heat generated between the tool edge and the workpiece. This minimizes tool wear, prevents material buildup on the cutting edge, and ensures a smoother surface finish.
What is the typical thickness of these tool coatings?
The thickness of these coatings ranges between 2.5 to 3 microns (UM). This thin structure provides the ideal balance between extreme surface hardness, resistance to peeling, and maintaining the sharp cutting edges of the tools.
How do I select the right coating color for my operations?
The color is a result of the chemical composition of the coating (e.g., AlTiN is Black, TiAlN is Violet, TiSiN is Copper, and nACo is Blue). You should select the coating based on physical specifications like required hardness and oxidation limits rather than the color alone.
Carto Tool
