Coating

Hard Coating

PVD hard coatings produced by INOVAP have the distinction of a wispy multi layer structure. The coatings were deposited by the PulsArc treatment. This process is a newly developed PVD technology with a multiplied electron emission and ionized plasma density on substrate surface caused by a controlled high current pulses.
Thus the deposited coatings have an improved wear-resistance and a reduced surface roughness.

Hard coatings like TiN, TiAlN, TiCN und CrN have the destinction of following properties:

•	The tough hardness decreases abrasion and the free formed surface and the scour wear of drillers, millings and hobs.
•	Hard coatings decrease the inclinations of tools to agglutinate or to weld with workpieces and beware cutting edges and function surface from agglomerates and agglutinations.
•	Decreased friction between the hard coated tools and workpieces reduces substantially cutting and forming forces.
•	The hard coatings are chemically resistant and low reactive for a longer tool life time.
•	The strong adhesion on tool surfaces and quasi-elastic behaivor of hard coatings reduce spallings, ruptures and outbursts also during strong forming and great cutting forces.

Tools with hard coated surfaces allow a substantial longer life time and a better usage rate for machinery. One can apply higher processing speed and gets more precise processed surfaces. It includes a reduction of setting-up and alignment time.

Coating Types and Recipes
For tools out of HSS, Solid Carbide, Carbide Metal and Cermet

Application and Profit
For tools out of HSS, Solid Carbide, Carbide Metal and Cermet

Thickness Measurement
with Calotte Grinding Device - KSG 110

Up to 10 well defined calotte grindings on a single coating can automatically and with programable parameters be made.

Schematic cross section – topview in light microscope

The calotte grindings are closely to each other in rows on measurement surface and can be found and measured with a microscope very easily.

Grinding parameters (rotating speed, number of rotations for each single calotte, distance between calottes on surface) can be selected and controlled by a SPS-unit. Afterwards the unit also calculates the thickness and final depth.

For layer thickness evaluation the very best or an average value of several calottes can be selected.

That implies thickness measurent values of high reliability and low standard deviation. The KSG 110 is very applicative because of its robustness also in production fields.

It is also possible to measure the wear coefficient as a function of depth reached in the coating. Even very small calotte grindings can easily be found because of its placement in rows.

Technical data

•	Adjustable force FN: 0 - 0,32 N (steel ball 20 oder 30 mm); 0 - 0,63 N (WC-ball 20 mm)
•	Tilting angle 0 - 90°
•	number of revolutions 50-5000 min^-1
•	Rotations: up to 1000000 / grinding
•	Grindings per sample: 10
•	Shown results: thickness of coating and depth of grinding in µm
•	Calculation: wear volume in mm^3; wear coefficient in m^3/Nm