Consistently high HVAF coating quality allows us to spray carbide and metal coatings with less effort and fewer QC issues. Find out why.
Find out how you can use our equipment to 3D print copper, aluminum and their alloys.
January 16, 2017
HVOF system spraying 550 g/min in HVOF mode,
1,600 HV300 WC-10Co-4Cr in HVAF Ultra modeMore
A range of spray guns from 80 mm ID
To 73 lbs./hr. HVAF AK7More
Guns designed to spray bulk-like non-oxidized Al, Ag, Au, Cu, Sn, Ti, Zn or different metalsMore
Do you want to spray WCCoCr at half the cost of HVOF?
Or prefer to make next level coatings? Choose here.More
We design and manufacture HVAF and HVOF thermal spray coating equipment and run the equipment we make in our shop in California, USA. We spray with our equipment and learn how to improve it from the various jobs we do. Everything we have in our product line has evolved from our spray shop work. Our spray shop effort serves as our real-world R&D lab.
Kermetico, Inc. manufactures HVAF and HVOF systems that are capable of operating a range of different high velocity guns for the efficient deposition of cemented carbide and metal coatings.
The coatings deposited with our Kermetico systems exhibit high density and hardness, combined with excellent ductility, which results in outstanding wear and cavitation resistance of our impermeable, corrosion-resistant layers.
This high quality comes with the additional benefit of lower coating cost due to the efficient use of Kermetico systems’ energy which results in high spray rates and deposits per pass four to eight times higher than conventional HVOF.
We manufacture thermal spray equipment combining the advantages of both technologies: high quality + low cost of HVAF and compliance with HVOF standards.
Convertible HVOF and HVAF equipment:
Multi-purpose HVAF AK systems, with a variety of spray guns:
Kermetico HVAF Technology in a Family of Thermal Spray Processes
The key characteristics of each process are spray particle temperature and velocity, as achieved during coating application.
Particles of different materials and various sizes are heated and accelerated very differently even using the same method or even different spray guns within the same process.
It is useful to understand the technological windows in thermal spray, as well as the trends in equipment and technology development.
Kermetico HVAF carbide overlays are superior to HVOF rivals regarding wear resistance, corrosion protection and production cost. The high speed of the in-flight particles (higher than 1,000 m/s | 3,300 ft./sec.) in our process enables the production of very dense coatings with high bond strength.
These coatings are gas-tight and form an impermeable barrier between an environment and a base material.
Moreover, the low spraying temperature (1,960-2,010°C | 3,560-3650°F depending on fuel gas) and gentle particle heating lead to minimal feedstock phase transformation and almost nonexistent elemental depletion/decomposition of the in-flight particle.
Furthermore, the replacement of pure oxygen used in HVOF processes with air in our HVAF process significantly reduces the oxide content in HVAF coatings, which is desirable for coating quality.
|WC-10Co-4Cr Coating Features||A Typical HVOF||Kermetico HVAF System Modes|
|Deposition efficiency, %||40-55||60-70||48-58||36-42|
|Young’s Modulus E, GPa||300||400||450||450|
|Apparent metallographic porosity||<0.8||<0.8||<0.5||<0.3|
|Bond strength, MPa (PSI)||80+ (12,000+)|
|Range of as-sprayed roughness, µm (µ in.)||3.5-4.5 (150-180)||1-3.2 (40-130)|
Kermetico HVAF & HVOF equipment produces WC-based coatings with the highest fracture toughness, substantially exceeding known samples.
Since the primary mechanism of wear of tungsten carbide coatings is attributed to the material brittleness, Kermetico’s HVAF overlay exhibits better wear resistance than pure HVOF versions.
We produce complete high velocity air and oxy fuel systems. Since our incorporation in 2006, we have installed more than 60 systems in the USA, Europe, Japan, and China.
Some of the systems are at work in Universities and National Labs, but most of them are used in production thermal spray shops.
We equip our systems with different spray guns; they are reliable and technologically efficient.
And they are not expensive.
For example, our HVAF system with the AK6 gun pays back your investment spraying a second metric ton of tungsten carbide.
We proudly design and produce our high velocity thermal spray equipment in the USA and install it all over the world.
You are welcome to visit our R&D center in Benicia to meet our designers and see our equipment in action.
We provide HVAF and HVOF thermal spray coating services in California, USA.
We efficiently deposit wear resistant and corrosion resistant coatings for varied applications.