Brief introduction:
As the core of supersonic flame spraying equipment, Zhengzhou Lijia adopts HV-80S kerosene supersonic flame spray gun. The spray gun adopts the US Praxair 5220 spray gun design structure innovation and optimization, the spray gun is today's global users widely used and proved to be the most stable and reliable universal kerosene supersonic flame spray gun, has been mature in the thermal spray industry.
The chamber pressure of the HV-80S spray gun can reach 10Bar/150psi; higher chamber pressure results in higher flame velocity and particle velocity, resulting in a more resistant and denser coating.
After kerosene and oxygen are mixed into the combustion chamber through the coaxial fuel line, a stable, clean and uniform flame is formed. The pressure value of the combustion chamber can be detected, which provides the operator with additional information to better control the combustion process as well as the combustion chamber pressure. Since the pressure of the combustion chamber is directly proportional to the flight speed of the powder particles, it is very important to monitor the pressure value of the combustion chamber. Monitoring the pressure value of the combustion chamber and the flow value of the gas can provide technical reference for the spraying process, so as to formulate the best process and spray the best coating.
The outlet of the combustion chamber, i.e. its throat, can be of different sizes and of a certain shape, divided into convergent and open, used to maintain a relatively low pressure area in the supersonic flame flow for powder injection. The powder is continuously and consistently injected into the flame and then sprayed onto the substrate at an accelerated rate.
The design of the HV-80S spray gun allows it to feed powder at low pressure in the powder feeder, which improves process stability and avoids flammable gas backfiring into the powder feeder hopper.
Gun material selection:
The main materials of Zhengzhou Lijia spray gun are imported from abroad chromium zirconium copper, by our company's engineers processing and upgrading to make this spray gun performance better, quality has exceeded the European and American imported brands.
Imported chromium zirconium copper has high strength and hardness, electrical and thermal conductivity, good wear resistance and wear reduction, hardness, strength, electrical conductivity and thermal conductivity after aging treatment are significantly improved, easy to weld. Widely used in motor commutator, spot welding machine, seam welding machine, electrode for butt welding machine, and other high temperature requirements of strength, hardness, conductivity, guide pad parts. With the production of EDM electrode can electrocorrode a more ideal mirror, while the upright performance is good, can complete the effect that is difficult to achieve pure red copper such as wafer, tungsten steel and other difficult to process materials.
Material physical parameters:
| density g/cm3 |
strength of extension N/mm2 |
hardness HV |
elongation % |
electric conductivity (20ºC)IACS(%) |
thermal conductivity (20ºC)W/m.k |
| 8.9 |
≥ 380 |
110-145 |
≥ 15 |
≥ 75 |
330 |
Material chemical composition:
| name |
Al |
Mg |
Cr |
Zr |
Fe |
Si |
P |
Summation of impurities |
| Chrome-zirconium copper |
0.1-0.25
|
0.1-0.25
|
0.1-0.8
|
0.1-0.6
|
0.5
|
0.5
|
0.1
|
0.5
|
Gun speed parameters:
Spray gun flame flow speed is greater than 2000m/s, powder particle speed: 600-1100m/s
Photo: HV-80S supersonic flamebrush
Characteristics and technical specifications of HV-80S kerosene supersonic flame spray gun
1) The use of patented kerosene physicochemical nozzle and combustion chamber, combustion is complete, no carbon accumulation;
2) The flame flow speed is stable and higher than other brands, forming a more powerful jet force;
3) Using aviation grade kerosene as fuel, oxygen as combustion gas, high combustion temperature, through the Laval tube action to produce 7 times supersonic flame flow.
4) adopts unique double channel waterway design, cooling fully, can work continuously for 24 hours.
| project |
parameter |
| flame speed |
2000m/s
|
| flame temperature |
3000ºC
|
| Spraying rate |
0-9.6kg/h(wolfram carbide) |
| Powder particle velocity |
600~1100m/s
|
| poriness |
≤1%
|
| coating bond |
≥70Mpa
|
| Spray powder size |
-30+5μm,-38+10μm,-45+15μm
|
| type of cooling |
water-cooling |
| cooling water flow |
2.3m³/h
|
| Dimensional weight |
450*85*170mm, 4.5kg
|
Audited Supplier 
The outlet of the combustion chamber, i.e. its throat, can be of different sizes and of a certain shape, divided into convergent and open, used to maintain a relatively low pressure area in the supersonic flame flow for powder injection. The powder is continuously and consistently injected into the flame and then sprayed onto the substrate at an accelerated rate.
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