SX-8000 HVOF supersonic spray tungsten carbide coating

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SX-8000 HVOF supersonic spray tungsten carbide coating
SX-8000 HVOF supersonic spray tungsten carbide coating

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SX-8000 HVOF supersonic spray tungsten carbide coating


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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

 

 

 

PLC

intelligent

 powder feeder

1.PLC and touch   screen are used to set parameters to precisely control powder feeding   accuracy and speed.

2The 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.

3Fully 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

 

 

 

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

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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.

 

 

8

Cooling tower
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9

Cold water tank

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10

High pressure pump

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11

 

 

  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

Coatingsfunction 

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

 

 

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

 

 

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:

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