Page 453 - Hartner

Coatings

Surface refining processes

bright Super A-coat or AlTiN-coat (aluminium titan nitride)
nanoA-coat or AlTiN nano-coat (aluminium titan nitride)
Due to their basically good properties, high speed steel and carbide
tools are supplied without being surface treated, i.e. in a bright finish. Coating colour: grey-violet
The well established A-coating has been developed at Hartner. By
Surface refining processes optimizing the structural, chemical and mechanical properties of the
For special applications it is desirable to increase the durability and new Super-A coating an extremely high hot hardness, very good oxi-
to reduce the sliding resistance and tendency of cold welding by dation resistance and excellent coating adhesion have been achie-
special surface refining processes. The following refining processes ved. This coating is used exclusively on carbide cutting tools and is
continue to be of less importance. Generally, much better results are ideally suited for difficult-to-machine aerospace materials such as
achieved with hard or soft coated tools. titanium alloys, Inconel as well as machining hardened steel materials
(>52 HRC) and HSC applications.

C-coat or TiCN-coat (Titancarbonnitrid)
steam nitrided Coating colour: grey
nitrided lands End mills and taps exposed to high mechanical load are coated with
TiCN. With respect to the high hardness and toughness of TiCN coa-
ting the tools offer good machining results operating with interrupted
Nitriding is a further means of increasing the durability of tools. This cutting.
finish is recommended for the machining of grey cast iron, aluminium
with a high silicon content, plastics, steels with a high perlite con- F-coat or FIRE/nanoFIRE
tent etc. Our tools are nitrided using different application orientated Coating colour: violet
processes. This TiAlN/TiN multilayer coating is applied to HSS and carbide drills.
It offers outstanding wear resistance in drilling operations and high
heat resistance. Besides conventional wet applications this coating
steam tempered is suitable for minimum lubrication and dry machining, often com-
bined with MolyGlide to optimize the running-in wear and improved
Steam tempered tools also offer a reduction in sliding resis-tance. resistance to galling.
Thus cold welding which occurs for example during the machining of
steels that have a low carbon content, can be avoided most econo-
mically. Steam tempered tools are only suitable for ferrous materials.

T-coat or TiN-coat (Titannitrid)
Coating colour: yellow-golden
Hartner coatings The monolayer Titanium Nitride coating is standard for HSS and
carbide tools. Used for drilling, tapping and milling operations.
A-coat or TiAlN-coat (titanium aluminium nitride) Nevertheless, most application is steel machining.
Coating colour: violet
The monolayer TiAlN coating is suited for abrasive operations with
carbide tools because of its high hardness and chemical resistance,
e.g. hard machining and high speed cutting (HSC). M-coat or MolyGlide®-coat auf MoS2-Basis
Coating colour: light grey
MolyGlide is a thin, friction minimizing coating for applications re-
quiring a minimum friction coefficient, e.g. dry or minimum quantity
lubrication (MQL) machining. Moreover, this coating offers resistance
to galling, when minimum lubrication fails.

Y-coat or TiAlSiN-coat
Coating colour: bronze
This multilayer, ultra hard and heat-resistant coating is especially
designated for the machining of high-tensile steels as well as
hardened steels and cast iron.

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