HVAF
High
Velocity Air Fuel
M3 Supersonic Spray Gun
The new M3 is the first spray gun to use Supersonic Air Fuel technology (patent pending) to deliver particle velocities in excess of 1000-1200 m/sec, approximately double the velocity of previous models such as the M2 and SB9500. Higher kinetic energy of solid particles produces higher contact pressures upon impinging the substrate, leading to better adhesion to substrate and cohesion within the coating. The result is a marked improvement in the physical and mechanical properties of the sprayed coatings. For instance, the hardness of WC86-Co10-4Cr coatings applied with agglomerated and sintered powder is increased to over 1400 HV300, a 27-32% improvement compared to AC-HVAF coatings. Electrical conductivity of copper coating applied with M3 exceeds that of coatings applied with Cold Spray. Due to practically non-existent porosity, corrosion resistance of M3 coatings used for hard chrome replacement is actually better than that of hard chrome plating.
The particle temperature monitor JetMaster™ that comes integrated with the M3 accurately measures in-flight particle temperature during spraying, eliminating all guess work from coating application and making it easy to set the correct gas parameters. Exceptionally consistent coatings are possible with complete repeatability. The M3 applies superior coatings with WC-based (-30+5µm) and Cr3C2-based (-38+5µm) powders, while it is also able to accommodate HVOF cuts with DE of up to 66% and 72% respectively, and materials with lower melting points (copper, aluminum, babbitt).
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Mach 3 particle
velocity
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Accurate measurement
and control of
in-flight particle
temperature with
optional JetMaster™
system
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Hardness of WC-based
coatings applied
with common brands
of agglomerated and
sintered powder is
increased to over
1400 HV300
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Negligible oxide
content (typically
1.5-2 times the
oxide content of
feed stock material)
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Compressive residual
stresses in coatings
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Porosity is
typically not
detectable (not
measurable)
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Non-clogging nozzles
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Axial powder
injection
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Highly Efficient
100% Air Cooling (no
water)
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100% duty cycle,
indefinite
continuous operation
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Multiple nozzle
configurations
provided for
different coating
materials
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Low operating cost
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Low consumption of
spare parts
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Not sensitive to
operator error
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Instantaneous
start/stop
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