What is HVOF?
High Velocity Oxygen Fuel(HVOF) is a thermal spray system applied
via a HVOF spray process using either a gas fuel or liquid fuel
HVOF gun. When the fuel and oxygen mix, they combust and are able
to be propelled out of the thermal spray gun at ultrasonic speeds!
The HVOF process is what improves the bond strength and provides
high density, high bond strength, optimum hardness, improved
toughness, and higher coating thickness.
Depending on chemistry or other factors, the short dwell time and
lower temperature of HVOF can produce wear-resistant coatings with
excellent impact resistance, improving its toughness.
How to choose the right diamond wheel in HVOF WC Coating Grinding?
The hardness of HVOF coatings requires that they be ground with a
diamond wheel. Diamond is the hardest material known in nature, and
it’s suitable for processing hard and brittle materials such as
cemented carbide, engineering ceramics, glass, semiconductor
materials ferrite, gemstones ect. Also it is the highest material
known to man and by applying diamond to HVOF grinding wheels,
Diamond wheels can grind substantially higher levels of the coating
compared to conventional wheels. It maintains its size and has an
exceptionally longer life.
The key to grinding HVOF coatings is following correct procedures
for diamond wheels, including but not limited to the proper
selection of the HVOF grinding wheel, grit size, grade and bond
type, proper mounting and balancing for the truing and dressing of
the wheel prior to grinding. Grinding and processing thermal spray
workpieces with resin diamond grinding wheel can achieve good
processing results and good economic benefits. Resin bond diamond
grinding wheel have the features of good self-sharpening, sharp
cutting, high efficiency, low roughness of work piece surface, few
heat generating and without burning work piece. They are suitable
for high efficiency and precision grinding of most workpieces.
Thermal Spray Technologies Include
Flame spray (wire,rod,powder), Arc spray, Plasma spray (includes
atmosphere controlled plasma spray), HVOF (high velocity oxygen and
fuel spray) or HVAF(high velocity air and fuel spray), Detonation
Spray, Cold spray
|Thermal spraying methods||Application cases of thermal spray coating|
|HVOF (high velocity oxygen and fuel spray)|
Spraying of cermet such as chromium carbide type materials
* High-temperature oxidation resistance turbine blade
* Anti-slip bridle roll
* Abrasion resistance paper manufacturing roll, etc
Attainment of thick overlay spraying as thick as 20mm.
Such as piston
|Flame spraying (wire, rod, powder)|
Rust preventive spraying for aluminum and zinc, etc
* Backup roll chuck
* Induction heating pot
* Abrasion resistance plunger
* Abrasion resistance sleeve
|Water plasma spraying|
Perfect for large-format, thick covering applications. oxide type
* Carbon plating
* Abrasion resistance,corrosion resistance conveyor pulley, Paper
* Ceramic molds