HVOF Thermal spray systems

HVOF is a thermal spray process utilising the combustion of gases, such as hydrogen, methane, propane, propylene, acetylene, natural gas or liquid fuels such as ethanol or kerosene. Fuel and oxygen atomise and mix within the combustion area. This mixture is ignited at controlled temperatures and pressures resulting in a flame with supersonic velocity. Material is injected into the flame and propelled towards the substrate to form the coating.

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HV-50 HVOF - gas fuel

The HV-50GF is a stand-alone single process, mass flow controlled (MFC) HVOF gas fueled coating system.

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HV-50 HVOF - liquid fuel

The HV-50LF is a stand-alone single process coating system, with mass flow controllers (MFC) for process gases and ES-flow controllers for liquid fuels.

Thermal spray spare parts

MP-50 - Multi process

The MP-50 makes it possible to perform both HVOF, plasma and combustion spray coatings with one system.

HVOF Thermal spray coating process

Fuel and oxygen are fed into a combustion chamber where they are ignited and combusted continuously. The resultant hot gas expands rapidly and exits through a converging-diverging nozzle. The jet velocity produced at the exit of the barrel (>2,000 m/s) exceeds the speed of sound. A powder feedstock is injected into the gas stream at various locations, dependent on the chosen Gun or Torch. The particles are then accelerated up to approximately 700 m/s.

 

The jet of hot gas and powder (spray stream) is directed towards the surface to be coated. The powder partially melts in the stream and deposits upon the substrate. The resulting coating has, among other attributes, very low porosity and high bond strength.

 

A wide variety of materials can be applied using the HVOF process in thicknesses ranging between 0.05mm to several mm.

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HorizonTM software

FST Horizon™ professional Thermal Spray Software – operates multiple thermal spray processes in one modular software platform. Increase your production output by using FST’s reliable, versatile, unmatched process control delivered by FST’s 50 Digital Series systems.

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More information about HVOF process?

High-Velocity Oxygen Fuel (HVOF) is a high velocity, low temperature thermal spray process used for the production of metallic and hard facing coatings. HVOF improves and restores a component’s surface properties through greater hardness, less porosity lower oxide content, higher bond strength, and a higher maximum thickness than a coating applied with most other thermal spray processes. HVOF coatings are therefore used in applications requiring the highest density and strength, whereby extending equipment life by significantly increasing erosion and wear resistance, and corrosion protection.