Each coating has both advantages and disadvantages in cutting. If an inappropriate coating is selected, the tool life may be lower than that of uncoated tools, and sometimes it may even cause more problems than before the coating.

1 Titanium nitride coating (TiN)

TiN is a general-purpose PVD coating that can increase tool hardness and has a higher oxidation temperature. This coating can achieve very good processing results when used on high-speed steel cutting tools or forming tools.

2 Titanium nitride carbide coating (TiCN)

The carbon element added to the TiCN coating can increase the hardness of the tool and obtain better surface lubricity, making it an ideal coating for high-speed steel tools.

3 Nitrogen-aluminum titanium or nitrogen-titanium aluminum coating (TiAlN/AlTiN)

The aluminum oxide layer formed in the TiAlN/AlTiN coating can effectively improve the high-temperature processing life of the tool. Carbide cutting tools mainly used for dry or semi-dry cutting can choose this coating. Depending on the proportion of aluminum and titanium contained in the coating, AlTiN coatings can provide higher surface hardness than TiAlN coatings, making it a viable coating option for high-speed machining.

4 Nitrogen chromium aluminum coating (AlCrN)

The good adhesion resistance of AlCrN coating makes it the coating of choice in processes prone to built-up edges. The machining performance of high-speed steel or carbide tools and forming tools is significantly improved after applying this virtually invisible coating.

5 Diamond coating (Diamond)

CVD diamond coatings provide optimal performance for non-ferrous materials machining tools and are ideal coatings for machining graphite, metal matrix composites (MMC), high-silicon aluminum alloys and many other highly abrasive materials (Note: pure diamond coatings The tool cannot be used to process steel parts, because when processing steel parts, a large amount of cutting heat is generated and causes a chemical reaction that destroys the adhesion layer between the coating and the tool).