The super-hard thin film coating:
Depositing TiC, TiN, TiCN, Al2O3 ... hard ceramic coating with a few μm on carbide tool is more suitable for high speed machining than WC series, and with higher feed strength than ceramic. There are two depositing ways -- CVD (chemical vapor) and PVD method (physical vapor method).
Demand characteristics of the coating film:
- Oxidation resistance
- Corrosion resistance
- The fatigue strength
- Thermal fatigue resistance
- Resistance to stripping
The coating is just like cutters’ armor, with powerful protection, acid resistance, resistance to oxidation, wear resistance and other characteristics, can increase tool life largely, improve the surface quality of work piece, increase productivity and quality approved rate.
Coating treatment must be in proper arrangement in order to play a high-performance under the conditions of usage. Hence, we must understand the coating characteristics, and then applied to the cutting tool to achieve better results.