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Cutting Tools
Tools made of high speed steel or carbide because of their generally good basic properties are delivered with a bright finish
without extra surface treatment. For special applications it is recommended that tools are optimised for diverse applications
by surface finishing processes, to achieve the following goals:
– Extension of the tool's life
– Reduced cutting force
– Increased cutting speed and feed rate
– Improved surface finish
– Improved dry processing
– Optimised hard processing
Surface finishing
Surface finishing processes compared
TiN
gold-yellow
single-layer
1 –4
2300
0.50
max. 600°
TiCN
light brown
multi-layer
1 –4
3000
0.40
max. 400°
TiAIN
violet
multi-layer
3
3200
0.55
max. 750°
TiAlN-S
blue
multi-layer
0.5–4
4500
0.45
max. 1200°
Diamond
black
–
0.5–2
5000
0.15
max. 350°
Fire
red
multi-layer
2 –6
3300
0.60
max. 850°
ZrN
light-gold
multi-layer
0.1–3
3400
0.50
max. 900°
grey
surface treatment
max. 5
400
–
max. 550°
silver-grey
surface treatment
20
1300
–
max. 550°
Signum
red-bronze
multi-layer
1 –5
5500
0.55
max. 800°
Surfaces-
Colour
Coating structure
Thickness
Hardness
Friction coefficient
Application-
finishing
µm
HV
versus steel
temperature
Surface finishing benefits at a glance
TiN
wear- and diffusion resistance
TICN
hardness, toughness
TiAIN
heat hardness, oxidation stability
Fire
Hardness, toughness, wear resistance
Slippage resistance
hardness, wear resistance on cast iron
Nitrated
steam
Nitrated
steam
Titanium-nitride coating
TiN
Titanium-nitride is a gold-coloured protective layer applied by a PVD
process (Physical Vapour Deposition). Higher hardness combined
with a lower friction coefficient achieves a significantly longer
service life and improved cutting performance. The TiN coating
is primarily used for drills and thread bores.
Titanium carbon-nitride coating
TiCN
Titanium carbon-nitride is a wear-protection layer applied by PVD,
being harder than TiN and having a lower friction coefficient. Tool
performance is increased through greater hardness, ductility com-
bined with improved wear. The TiCN coating is primarily used for
NC drill bits, thread bores and end mills.
Titaninum aluminium-nitride coating
TiAIN
Titanium aluminium-nitride is a multi-layer ceramic coating applied
using the PVD method. The resulting greater hardness and oxidation
stability make this coating ideal for higher speeds and feed rates for
extended tool life. The TiAlN coating is used mainly in drilling and
milling machine processes, and is also recommended for dry pro-
cessing.
Titaninum aluminium-nitride S coating
TiAlN-S
This coating is particularly recommended for machining hardened
materials (> 70 HRC). It is used mainly for end mills and is
characterised by high wear resistance. Dry machining is also
possible as is HSC machining.
Diamond coating
This coating is particularly suitable for the processing of reinforced
plastics, aluminum and copper alloys. The friction coefficient on
steel is very low.
Fire coating (TiAIN/TiN)
Fire
Fire is a TiAIN/TiN multi-layer coating with a gradient structure. The
combined benefits of TiAlN and TiN coatings are very good wear
resistance with high thermal stability, hardness and toughness.
In addition to the conventional wet application, this layer can also
be used for minimum quantity lubrication and dry machining.
Zirconium-nitride coating
ZrN
Zirconium-nitride is suitable for machining non-ferrous materials,
and especially for aluminum alloys. This coating is not good for
cold welding of aluminium. Associated with high layer hardness
and oxidation resistance are advantages that increase tool service
life and effective feed rate and cutting speed
Steam tempering
steam
Steam tempering is a form of surface processing which reduces
slide resistance and prevents edge build-up. Cold welding can also
be avoided. Steam tempering is primarily used with drills and thread
bores.
Nitriding
Nitrated
Nitriding is a surface machining process that increases hardness and
wear resistance. Particularly for working with highly abrasive materi-
als such as cast iron, which nitriding is particularly suitable for.
Nitriding is primarily used with drills and thread bores.
Signum coating (TiALN/SiN)
Thanks to the special nano-composite structure with a protective
layer of TiALN and SiN this coating, with 5500 HV is one of the
hardest on the market. Particularly for hard machinability materials.
High standard wear resistance combined with high diffusion resis-
tance.
Signum
Diamond
Milling Cutters
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