SX-8000 HVOF supersonic spray tungsten carbide coating
SX-8000 HVOF equipment Site preparation:
1.main power switch + propane + nitrogen + liquid oxygen ( for HVOF advanced plasma spray gun）
A, nitrogen: nitrogen for powder feeding, common nitrogen cylinder, nitrogen pressure 0.8mpa
B, propane: propane for spray gun ignition, ordinary propane cylinder, propane pressure 0.8MPa
C: liquid oxygen: liquid oxygen gas and kerosene are added together to produce a flame.
2.Ordinary industrial kerosene or aviation kerosene should be clean and free from impurities. Fuel interface can be directly connected to the oil drum and tilt the oil drum. The oil drum should be equipped with 10um fuel filter and re-supply equipment.
3. Sprayed All kinds of ceramic coatings Including:Tungsten carbide, nickel-chromium carbide, nickel-chromium alloy, etc. / Carbide powder :WC, TiC, Cr3C2, etc. / cermet powder: WC-CO, CR3C2-NICR, etc
SX-8000 HVOF spraying equipment is an improved spraying equipment based on the introduction/digestion/absorption of foreign advanced equipment and technology.
Compared with other HVOF, there are eight distinct and significant characteristics:
1. Kerosene is the fuel and oxygen is the combustion aid. This is a relatively safe way to burn.
2. The gun is designed according to the principle of rocket engine. Chamber pressure up to 150PSI and speed up to 150PSI
Flame greater than 2000m/s. Large output power, no level adjustable.
3. Powder gun adopts radial feeding method. This new injection method allows the powder to be better melted and evenly distributed throughout the flame,Improve the coating efficiency and quality;
4. A certain temperature range is determined by system design, and speed increase is the main objective function of structure optimization. X-ray diffraction test shows that the coating not only has high strength and high density, but also has surface stress.
5. Modular design, high-performance PLC control, easy to operate
6. The combustion design has particle velocities of up to 1100 M/S(3,300-3,900 ft/s), significantly faster than other HVOF systems.
7. Coating thickness greater than 1/2 inch (compressive stress coating). The microhardness of the coating is higher than that of any other HVOF system (WC-Co), with a hardness of 1450, while the microhardness of other gas HVOF guns is only 1100 ~ 900;
8. The SX-8000 supersonic flame spraying equipment achieves excellent high pressure HVOF coating quality, and the coating can reach a binding strength of 90MPa.
The equipment contains:
1-intelligent control system 2-gas safety center ;3-intelligent powder feeder;4-spray gun;E-water chiller;5-the oil storage tank and piping connection.
1 |
Safety Center | gas safety center Functional features: A. Three kinds of gas (H2, N2, ar2) leakage detection system. B. Gas leakage alarm device. C. Cut off the air inlet pipe quickly. D. Flashback prevention and flameout device of spray gun. E. Leakage protection, cut-off and alarm device. F. Current overcurrent protection device. G. Overvoltage protection device. H. Water leakage pressure sensing device. 1. Super high water temperature warning, shutdown system. J. Dust concentration monitoring alarm and shutdown device.
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2 |
PLC intelligent Operating system | Intelligent touch control device Used for water, electricity, gas, powder Regulation and control. The entire system can be monitored, and the user can also control the gas flow and gas ratio by adjusting the main and secondary gases on the control panel, thereby changing the length of the supersonic arc and the speed of the flame flow, and ultimately the speed of the powder particles. Panel design, easy to use, more simple and intuitive operation. |
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4
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PLC intelligent powder feeder | 1.PLC and touch screen are used to set parameters to precisely control powder feeding accuracy and speed. 2、The system consists of two sets of independent powder feeding devices. The capacity of the large tank is 20 liters, and the speed of the scraper-type powder feeding is 150 g/min. The small tank adopts the drum-type powder feeding device, which is suitable for feeding various ultra-fine powder and hard-to-deliver powder mixtures. 3、Fully enclosed plastic-steel chassis, free from environmental disturbance such as temperature and humidity, transparent glass door, powder feeding state at a glance. Powder vibration device, powder tank heating device and weighing device can be selected |
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5 |
spray gun
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SX-8000 supersonic flame spraying gun use kerosene as fuel, oxygen for combustion supporting gas, air and water for cooling body, nitrogen is for powder feeding. Gun can work for a long time continuously and stably.
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7 |
Cooling system
| Chiller
| Heat exchanger is also called refrigerator or water chiller. We use double motors compressor to make this machine smaller and save space for our customer. The spray gun is cooled down by water, and we use heat exchanger to cool down the high temperature water coming from spray gun, and then use these cooled water to cool down the spray gun again. In this way the spray gun can keep a normal working temperature and prolong the usage life of spray nozzle. Function characteristic The range of testing temperature is -4.9℃-94.9℃,dispraying resolution ratio is 0.1℃,controling sensitivity is 0.1℃,offset range is -0.5℃—10℃,used in AC220V input.the instrument use condition:relative humidity less than 90%RH,the temperature is within 0—45℃ with no corrosion and water-proof.
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8 | Cooling tower | ||
9 | Cold water tank
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10 | High pressure pump
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Standard utility cable |
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1 Set |
List of powders that can be sprayed by the SX-8000 HVOF spraying equipment
Powder name | Wt,%, composition | (ɥm) Particle Powder size | Coating hardness | Coating’sfunction and application |
Tungsten carbide | 80%(WC)+12%(Co)
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-45+15 |
HRC70-90 |
WC-Co is a high hardness cobalt-based coating powder, the use of agglomerated sintering process, it is cast tungsten carbide surface coated with a layer of metal cobalt layer as protection and bonding, with excellent resistance to particle wear and high temperature oxidation resistance, suitable for plasma spraying and supersonic spray process, often used in strong wear occasions, such as: Guide plate, shaft, process roller outside continuous annealing furnace, hard sealing surface, etc |
nickel-chromium carbide | 75%（Cr-3C2）-25% （Ni Cr）
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-45+15 |
High temperature wear-resistant ceramic powder |
Cr3C2-NiCr high temperature wear-resistant ceramic powder, high hardness ceramic coating, high temperature oxidation resistance temperature up to 900°C, suitable for supersonic, plasma spraying. Commonly used for boiler "four pipe" and lead, exhaust fan blade, high temperature pipe and other spraying |
Silicon carbide |
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-45+15 |
Wear resistance, high temperature resistance, corrosion resistance, acid and alkali resistance
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High-performance structural ceramics, (rocket nozzles, nuclear industry) structural coatings, functional coatings, protective coatings, wave absorbing materials, stealth materials in the aerospace industry; Protective armor of tanks and armored vehicles, can be used as coating tools, cutting tools, measuring tools, abrasives; Can be used for special purpose structural coating, functional coating, engineering coating, engineering ceramics; Igniter; Electric heating elements for electrical industry; Far infrared generator |
Nichrome aluminum |
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-140M+325M ；-325M
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Ni Cr 18Al nickel-chromium aluminum coating powder (exothermic composite powder) |
Exothermic composite powder, the alloy is resistant to hot gas corrosion and micro-vibration wear, is an excellent bonding material for high temperature metal coating and high temperature ceramic coating, and can also be used as a high temperature anti-oxidation working coating |
Sx – 8000 plasma spray equipment parts procurement:
Part name |
Brand |
Origin |
PLC The controller | Siemens | Germany |
TOUCH Touch screen | Siemens | Germany |
Solenoid valve | SMC | Japan |
Pneumatic valve | SMC | Japan |
Pressure switch | SMC | Japan |
Pressure sensor | Omron | Japan |
Relay | Omron | Japan |
Electrical switch | Schneider | The French |
Contactor | Schneider | The French |
The oil pump | Danfoss | The Danish |
Flow switch
| kewell | Germany |
Sprayed All kinds of ceramic coatings Including:
