HighVelocityOxygenFuel(HVOF) - cheap HighVelocityOxygenFuel(HVOF) and HighVelocityOxygenFuel(HVOF) manufacturer from china by item 35534424.

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Faucets, Mixers & Taps [1]
Hard Drives [1]
Other General Mechanical Components [1]

contact datails

Jiangxi Hengda Co.,Ltd

No.88 Jinlu North Road,High-tech Development Zone,Nanchang,China Postal code330096

0791-8196865 8196532

HighVelocityOxygenFuel(HVOF)


company	Jiangxi Hengda Co.,Ltd
Categories	Signal Generators
Update	2011-03-16
Original Region	China
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HighVelocityOxygenFuel(HVOF)

High Velocity Oxygen Fuel (HVOF)

Our company has developed a new abrasion-resisting coating technique--- HVOF, based on introduced and assimilated international advanced surface engineering technique. Maintaining its original excellent performance, it also realizes the equipment miniaturization and long-distance manipulation, and possesses the world-class construction ability at scene.

HVOF technology take the propane of high purity as fuel and the highly-pressed oxygen as combustion support. Then both are sent to the spray gun by controlling system under certain pressure and discharge, and lighted by electric sparks. Therefore, the gas with high temperature and high pressure forms, which is speeded up to more then 6 times velocity via the Laval nozzle.

The powder-sending-off system transmits the spray powder from Laval nozzle’s low pressure zone to flames. After heated by flames, it will be melted and atomized, then sprayed to the surface at high velocity. There forms dense, perfect and less oxidized coating with high stiffness and strong combination.

Comparison between HVOF and other heat sprays：

Performance	HVOF	Common electric arc spray	Spray welding
particle speed	High velocityup to500～600m/s	Low speedonly about 100m/ s	Low speed
Coating bond strength	70～100MPa	<20MPa	100MPa
Coating porosity	Extremely low	High	Extremely low
Workpiece deformation	Under 150℃no deformation	Thin materials inclined to be deformed	Basic materials change in metal, easy to be deformed

HVOF coating technology Datum

Coating elements	WC－Co	Cr₃C₂－NiCr
Micro stiffness	1350Hv	1000Hv
Coating bond strength	＞70MPa	＞90MPa
Situation requirements	under the oxidization ＜550℃	550～930℃
Coating performance	ultrahigh stiffnesslong-lasting. Especial Fitting to the protection of well-worn parts like exhaust or suction fans ,etc	Under high temperature it becomes harder as the temperature grows. It has a strong hot stiffness, which is the best protection material for CFB boilers.

applications:

HVOF coating has strong coating bond strength, low porosity, high stiffness, which enable it to be coating with various functions like wear-resistance, corrosion-resistance, thermal conductivity, insulation, electric conduction, air-tight wrapping and so forth. In the mechanical manufacture, astronautics, water conservancy and electric power plant, mining and metallurgy, petrochemical industry, paper-making and leather-production, it could be used widely. The followings are the critical applications:

Electric power plant: boiler bed, blower blade

Metallurgy: rollers, axles, blower blade.

Chemical industry: valve, tank reactor, flue, axles.

Petrol: oil-pumper, piston, hydraulic pressure piston, axles

Paper-making and printing: rollers, cutting tools

Common machinery: axles

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