Kermetico HVAF and HVOF Thermal Spray Coating Equipment and Technology
Kermetico designs and manufactures HVAF and HVOF thermal spray coating equipment. Kermetico sprays with the the HVAF and HVOF equipment, in our shop in California, USA. Kermetico develops HVAF and HVOF application solutions in our job shop. Our entire HVOF HVAF product line has evolved from our spray shop work. Practical pragmatic thermal spray coating solutions serves as our real-world R&D lab.
Kermetico, Inc. manufacturers and builds in house HVAF and HVOF systems that operate a range of different velocity guns for the efficient spraying of tungsten carbide and metal coatings.
Our HVAF Carbide and metallic coatings sprayed with our Kermetico systems have high density and hardness, combined with excellent ductility. . This means outstanding wear and cavitation resistance of our impermeable, corrosion-resistant layers.
This high quality comes with lower coating costs. Kermetico HVAF systems use energy effectively, resulting 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: Kermetico C operates in HVOF and HVAF modes
Multi-purpose HVAF AK systems, with a variety of spray guns:
Kermetico HVAF Coating Features
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.
Kermetico HVAF coatings are gas-tight and form an impermeable barrier between an environment and the substrate. The low spraying temperature 1,960-2,010°C depending on fuel gas and gentle particle heating lead to minimal powder phase transformation and almost nonexistent elemental depletion & decomposition of the in-flight particle. 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 HVOF System Modes
Economy Balanced Ultra
Deposition efficiency, % 40-55 60-70 48-58 36-42
Hardness, HV300 1,050-1,250 1,050-1,250 1,250-1,350 1,350-1,600+
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 HVOF.
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.
You are welcome to visit our Kermetico Thermal Spray R&D center near San Francisco to meet our designers and see our equipment in action.
We efficiently deposit wear resistant and corrosion resistant coatings for varied applications, including: