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SURFACE
TECHNOLOGY COATINGS |
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Sutton
Products Listing
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Which Coating Should I
use ?
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| This is
a frequently asked question and the answer depends on the
interaction of the geometry and tool material with the work-piece
and the specific operating conditions. |
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first recommendation is that each new application should be
evaluated using the combined knowledge of the tool user and coating
centre specialist to choose the best coating. The accompanying chart
provides some general guidelines for the selection of the correct
coating for certain applications. |
| It is
important to understand that more than one coating may show improved
results over an uncoated tool. For example, TiN has proven to be an
excellent choice for improving the productivity in milling of low
and high alloy steels. However, recent results by customers indicate
a potential for even higher productivity with TiCN making it the
preferred coating in this application. |
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| TiN
(Titanium Nitride) |
| Properties |
| Colour |
gold/
yellow |
| Film
Thickness |
1-3
microns |
| Micro
Hardness |
2300
Vickers (approx. 85 Rockwell) |
| Thermal
Stability |
up
to 6000oC |
| Friction
co-efficient |
0.4
TiN/Steel |
| Resistance
against abrasion |
Very
Good |
| Resistance
against cold welding |
Excellent |
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| Titanium
Nitride was the first PVD wear resistant firl coating
introduced at Surface Technology coatings. It is an excellent
general purpose coating for protecting a wide variety of tools
and parts from wear. |
| TiN
is an ideal choice for the machining of iron based materials,
die casting and palstic mould tooling. TiN is also an
excellent coating or wear part applications demanding
resistance to abrasive and adhesive wear. |
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| Applications
and Benefits |
| General
purpose use |
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wide
range of materials |
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3
to 8 times longer tool life |
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higher
tool speeds and feeds |
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| Improved
performance with : |
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Wide
range of cutting tools in both HSS and Carbide |
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plastic
moulds and moulding machine parts |
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medical
and dental instruments |
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medical
and dental instruments |
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Slitting
knives for the plastic and paper industries |
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high
performance forming tools |
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| Case
History |
| Punching
of Steels |
| Piercing
punch: |
| Material |
High-speed
steel |
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6.5mm
diameter |
| Workpiece |
DIN
1.4021/AISI |
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420
5.9mm thick |
| Uncoated |
4000-5000
parts |
| TiN |
25,000
parts before first regrinding |
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| Titanium
Carbonitride - TiCNite (TiCN) |
| TiCNite
coated tools have a very high surface hardness, over 3000
Vickers (approximately 90 Rc). TiCN is harder and
tougher than other coating materials, consequently it has high
resistance to edge chipping and is a good choice in milling
applications. |
| Sutton
TiCNite coated cutting tools with a cobalt grade of
high speed steel can perform at speeds and feed up to 40%
above conventional uncoated cutter and in some aplications,
speeds and feeds similar to carbide tools can be achieved.
This is why TiCNite has been selected as a standard
coating. |
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| Typical
benefits include : |
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high
speeds and feeds possible for enhanced machine productivity |
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difficult
to machine materials can be worked |
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wear
resistance and toughness superoir to TiN |
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recommended
for use in all steels, cast iron and aluminium |
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In-house
PVD coating chambers
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