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Help CenterThermal Spray for Screw Coating
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HOVF coating system spray tungsten carbide coating on screw to wear resistant
Characteristics
The principal of HVOF spray machine is: the mixture gas of oxygen and fuel gas is sent to the burning area of spray gun exit under high pressure. Then the burning gas is accelerated to form a supersonic flame with the help of peripheral compressed air. The spray powder is sent into burning flame and make a functional coating.
It consists of spray gun, powder feeding machine, control system, heat-exchanger system and pipeline system. It’s a compact equipment with the traits of easy-operating, stable working performance, low fuel consumption and high-quality coating.
Configuration of arc spray machine
It consist of control cabinet, spray gun, powder feeding machine, water chiller and cables
Spray materials
HVOF spray machine can spray metarial of part of Alloy powder ( Tungsten carbide /WC-Co, Cr3C2-NiCr, MCrAlY, Cr C, Cr Co, Cr, etc.)
Advantages of process
1. Wear resistant
2. Anti Corrosion
3. Thermal Barrier coating
4. Recycle the products (Repair the worn-out parts )
5. Prolong product use life
6. Rebuilding of under size parts
7. The coating has low porosity and high bond strength and hardness
Parameters of HVOF spray machine
|
number |
item |
parameter |
|
1 |
Flame temperature |
2700°C |
|
2 |
Spray particles velocity |
500~600m/s |
|
3 |
cooling |
Water cooling |
|
4 |
Cooling water-flow |
9.5L/min |
|
5 |
Coating porosity |
<1% |
|
6 |
Coating strength |
>70MPa |
|
7 |
Powder measurement |
5-120μm |
|
8 |
Fuel gas(C3H8)pressure and flow |
0.65MPa 88L/min |
|
9 |
Oxygen pressure and flow |
11MPa 305L/min |
|
10 |
Air pressure and flow |
0.75MPa 440L/min |
|
11 |
nitrogen pressure and flow |
1 .2MPa 18 L/min |
|
12 |
Hydrogen pressure |
0.35MPa |
|
13 |
Spray gun outside measurement |
420×230×50 |
|
14 |
Spray gun weight |
2.8Kg |
The HVOF coating system powder feeding machine is used to store spray powder and send them to burning flames according to technological requirements. The feeding gas is nitrogen, which pulverizes the powder and sends the pulverized particles along with the gas to spray gun. You can regulate the feeding velocity by the localizer on the regulating control panel.
Parameters of the feeding machine
| number | item |
parameter |
|---|---|---|
|
1 |
Feeding pattern |
Pulverizing and gas pressure |
|
2 |
Volume of single can |
3.0L |
|
3 |
Feeding gas |
nitrogen |
|
4 |
Pressure of feeding gas |
1.1-1.3MPa |
|
5 |
Feeding velocity |
0~160g/min |
|
6 |
Feeding accuracy |
±1% |
|
7 |
Feeding gas flow |
400-800L/h |
|
8 |
Outside measurement of feeding machine |
500×460×1300mm |
|
9 |
Weight of feeding machine |
50Kg |
Other main thermal spraying equipments and service:
(1) Vacuum plasma spray machine
(2) Thermal spray coating services
(3) HVOF spray equipment
(4) Plasma spray equipment
(5) Arc spray equipment
(6) Sputter Target Produce Equipment and technology
(7) Industrial water chillers
(8) Precious metal vacuum coating equipment
(9) Cooker magnetism and thermal conduction coating spraying production line
(10) Electro Brush Plating Equipment
(11) High power flame plastic spray equipment
(12) Arc spray wires (As Zinc wire, Aluminum wire, copper wire, NiAl alloy wire, brass wire, etc)
(13) Thermal spray powder (Al2O3, Cr2O3, TiO2, ZrO2, WC-Co, CrCo-NiCr, etc)
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