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PVD thin film functional coating machine / PVD hard coatings Equipment on Tools
Hard coatings, formed by reactive Physical Vapor Deposition ( PVD)
processes, based on plasma technology,are becoming widely used in
the tool industries.
In order to get the most hard, tense, wear-and corrosion-resistant
coating, the substrate temperature should be as high as possible,
and concurrent bombardment by energetic atomic-sized particles (
Ion-plating ) during the reactive deposition should be used. For
example, in coating hardened steel drills, the substrate is heated
to 450℃ or so before deposition is started. This pre-heating can be
done by ion bombardment, which also sputter cleans the surface, or
by using other heating sources in the deposition chamber.
During the process of PVD hard coating for tools, it does not
change the physical dimensions of the part significantly.
The plasma gas used for reactive deposition is a mixture of argon,
nitrogen and ethyne. The composition of the coatings is varied by
varying the gas mixture.
The most common vaporization sources for the ion plating of hard
coatings are unbalanced-magnetron- -sputtering sources, and
cathodic-arc-vaporization sources. Bombardment during deposition is
commonly achieved by applying a negative bias (-200 to -300 volts )
to the substrate and accelerating positive ions to the surface from
a plasma. A high ratio of bombarding ions to depositing atoms is
important for densifying the depositing material. In the
unbalanced-magnetron-sputtering source, few of the sputtered atoms
are ionized; but in the cathodic arc sources, a high percentage of
the vaporized atoms are ionized. Because these “ film ions ” have a
higher mass than do the gas ions, they are better able to sputter
surfaces and densify films by “ atomic peening.”
Industrial tool coatings are typically 1.5 to 4 microns in
thickness.
General Reference: Education Guides to Vacuum Coating Processing,
written by Donald M. Mattox, 2009 by Society of Vacuum Coater.
Applications:
Hard coatings are becoming widely used in the decorative coating
and industrial tools (HSS or HSC
materials). The coatings are more resistance to wear and corrosion,
to fulfill the tools functions more reliably and for a longer life
time, 2-3 times longer than without coating in general.
Cutting Tools: ( Suggested Coatings: AlTiN/TiAlN, TiCN and TiN)
Sawing, milling, CNC insert ( hard turning using), drilling,
hobbing and gear cutter etc.
Punching & Forming ( Suggested Coatings: CrN, TiCN and TiN)
Metal Stamping
Moulding ( Plastic Injection Mold) -- ( Suggested Coatings: TiCN
and TiN )
Die Casting
Precision Components
Others, like: machine tools, texitile machine, re-coating,
re-sharpening applications etc.
Thin Film Coating Machine Description
1. RT-HAC equipment systems consists of: vacuum chamber, vacuum
pumps, arc sources, spindle & jack, jigs structure, heating
& cooling, water & gas( distribution), electrical control
& operation systems etc.
2. Application: industrial functional coatings for hard tools.
3.Coating Films: TiN, TiC, CrN, AlTiN etc.
4.Coating Advantages: high hardness and wear-resistance and
corrosion,increased tool life time & improved workpiece
quality. "
PVD (Physical Vapor Deposition) is a widely used and advanced
surface treatment technology in the world at present. It can really
get micrometer coating and pollution-free environmental surface
treatment. In a vacuum state, the coating material is vaporized by
ion physical method and deposited into a coating on the surface of
the product.
PVD coating features:
(1) excellent adhesion: PVD coating has high adhesion and
durability. It can be applied to bending at different angles
without cracking or spalling. It can be used for inside and outside
decorations.
(2) anti-oxidation, corrosion resistance: stable chemical
properties, in the normal environment, indoor and outdoor can be
antioxidant, not easy to fade, maintain metal glossiness.
(3) increase the surface hardness: the hardness of the film
measured by Micro, up to HV2250
The type and thickness of the coating layer
(1) the species of the coating:
PVD coating technology can prepare nitride film (TiN[titanium
gold), ZrN [zirconium gold], CrN, TiAlN] and carbide film (TiC,
TiCN), and oxide film (TiO, etc.).
(2) the thickness of the film layer:
The thickness of the film is micrometer, and the thickness of the
coating film is generally 0.3 u m~0.5 mu
Please contact us for more specifications, Royal Technology is honored to provide you total coating solutions.