E-SHOP - TOOLS / Types of coats

Main benefit of PVD coats consists in the extension of service life and increase of productivity of milling cutters at chip machining. The coats are known for:

 

 

ZPS-Frézovací nástroje has selected the TiAlN (universal) coat as the most suitable coat for majority of applications after consultations with the supplier of the coat. This coat will be offered as a standard coat that will be maintained in stock for catalogued plain face milling cutters (DIN 844) and slotting cutters (DIN 327) in the future period. The aim is to shorten delivery terms of coated tools and to simplify selection of the correct coat for the end users. 

 

To be said shortly, it is possible to increase the standard cutting speed of an uncoated tool 1.3 times (in case of TiN), 1.4 times (TiCN) and 1.5 times (TiAlN, AlTiN). These values are only approximate as they depend on many factors such as cooling, suitable machine, correct selection of coat for the material being machined etc.

 

The technology of cathode arc steaming that is most frequently used method in the world is utilized for application of hard abrasion resistant coats. Coating is made using the Platit Swiss technology.

LISS a.s (www.liss.cz) is a supplier of coats.

 

 

TiN – a basic coat. It is used for machining at low cutting speeds and machining of steels with low strength. It has excellent resistance to adhesion wearing. When compared with uncoated tools, it demonstrates durability of the cutting edge longer by 30-40%.

 

TiCN – coats with high resistance to abrasion and with a very low friction coefficient. The coat is suitable for milling of steels with medium carbon content, with lower up to medium strength. This coat is ideal for milling of grey cast iron. The coat demonstrates high hardness and simultaneously good toughness. High-quality cooling is an important factor for effective machining using this coat.

 

TiAlN – a universal coat for machining of a wide range of materials with medium and higher strength at medium and higher cutting speeds. It has excellent hardness – toughness ratio thanks to a multi-layer structure. Thanks to higher oxidation resistance and hardness at higher temperatures, it does not require perfect cooling.

 

AlTiN – a coat with very high oxidation resistance suitable for demanding applications such as milling at high cutting speeds or milling without cooling. The coat is suitable for machining of e.g. nodular cast iron, steels with high strength or steels for forging. 

 

AlTiCrN – a coat for demanding milling of materials with high resistance to hot abrasion.

 

nACRo – a new generation of nanocomposite coat with high hardness and oxidation resistance. It is suitable for machining of difficultly workable materials such as titanium alloys and thermally resistant alloys.

 

CrN – a special coat for machining of pure non-ferrous metals such as aluminium and copper. The coat prevents machined material from sticking on the tool.