Wear Resistant Coating for Roller and Transport Roller Hvof Equipment High Velocity Oxygen Equipment Thermal Spray Equipment Tungsten Carbide Coating Equipment

• Warranty: 1 Year
• Type: Coating Production Line
• Coating: Powder Coating
• Substrate: Steel
• Certification: CE, ISO
• Condition: New
• Model NO.: HVAF
• Control Type: Full Closed-Loop PLC Control
• Porosity: Between 0.1 and 0.3 Percent
• High Deposition Efficiency: 5-30 M,15-45 M (Hvof Mode)
• Powder Feeding Efficiency: 0.26kg/H
• Fuel: Propane and Compressed Air
• Transport Package: Wood
• Specification: powder feeder, spray gun and control cabinet
• Trademark: Lijia
• Origin: Zhengzhou, China
• HS Code: 8424899990
• Production Capacity: 100/Year

Product Description

Component	Characteristic	Parameter
HVAF Control cabinet	1. Imported core parts, full closed-loop system, Mitsubishi high performance PLC control 2. Solid design, pressure sensor and solenoid valve all imported from Europe and America, the quality is the same as the European and American equipment. 3. Touch screen operation, intelligent automatic operation; 4. Process parameters are clear on the touch screen panel; 5. One-key operation can realize automatic and real-time detection of spraying process, and multiple alarm prompts can make immediate response to system failure.	1. Program control: full closed-loop PLC control 2. Interface control: 15-inch touch screen 3. Flow control: mass flow controller + electric pressure regulating valve 4. Propane pressure: 1.0mpa 5. Air pressure: 1.1Mpa 6. Carrier gas pressure: 1.0mpa 7. Propane flow rate: 0~50kg/h 8. Air flow rate: 400-600m /h 9. Carrier gas flow: 0~100L/min 10. Main parts producing areas: America, Japan and Italy

Component	Characteristic	Parameter
E-2000 Powder feeder	1. The powder feeder is a high-precision powder feeding mechanism based on the principle of toothed dial with vibration structure and gravity falling, with uniform powder output and wide particle size range. 2. After the top cover is sealed, the powder condition in the powder cylinder can be clearly seen through the visual transparent observation window on the powder cylinder. 3. Nitrogen or argon with small flow is used as powder gas. The powder is rotated to the powder outlet along with the powder tray at the bottom and enters into the spray gun together with the powder gas. 4. Adopting the latest international turnover structure, it is convenient to clean the powder, which can be discharged from the lower mouth, or can be poured from the barrel body.	1. Powder feeding: toothed dial 2. Cleaning method: barrel body flip 3. Volume of powder storage tube :2L 4. Powder feed gas: nitrogen 5. Powder feeding air pressure: 0.15-1.2mpa 6. Powder feeding speed :0~500g/min 7. Powder feeding accuracy :±1% 8. Powder size :1~150 m

 

Item	Coating properties (WC as an example)	Other features (WC as an example)
LA2 supersonic flamethrower	1. Hardness: 1050-1400HV0.3 2. Porosity: less than 0.5% 3. The coating generates residual compressive stress 4. The oxide content in the coating can be ignored	1. Powder size: -30+5 m, -30+10 m 2. Particle velocity: about 935m/s 3. Deposition rate: 40-55% 4.Maximum spraying rate: 30kg/h
LA3 supersonic flamethrower	1. Hardness:1050-1600HV0.3 2. Porosity: less than 0.5% 3. The coating generates residual compressive stress 4. The oxide content in the coating can be ignored	1. Powder size: -30+5 m, -30+10 m, -40+15 m 2. Particle velocity: about 935m/s 3. Deposition rate: 40-62% 4. Maximum spraying rate: 35kg/h

 

HA-2000 has many functions and features, and its advantages are mainly reflected in the following aspects:
1) Touch screen operation, the design structure of the equipment adopts full closed-loop automatic control structure, the gas is all controlled by pressure sensors imported from the United States and pressure regulating valves imported from Japan, the pressure can be monitored in real time and automatically reach the set value of the process.
2) The fuel is propane and the combustion-supporting agent is air, which is the safest combustion mode among the gas models in the market at present;
3) The structure of the spray gun is designed according to the principle of the rocket generator. The flame flow speed reaches over 2000m/s, with large output power and stepless adjustment;
4) The spray gun adopts axial center powder feeding. This new injection method makes the powder dissolve well and distribute evenly in the whole flame, which improves the coverage efficiency and coating quality;
5) It has the function of process recipe storage and invocation. Parameters can be added, modified and saved.
6) The system fuel adopts full closed-loop design, modular design, high-performance PLC control, safe and simple operation;
7) The coating produced has excellent performance with low porosity less than 1% (average porosity less than 0.5%) and high spray efficiency (up to 30KG powder per hour).

In the metallurgical industry, there are many kinds of rollers and conveying rollers that need to be strengthened or repaired. Among them, the continuous annealing furnace bottom roller of cold rolled strip steel is an important one. Cold-rolled strip steel depends on a set of rollers in furnace turn the implementation work, general of temperature in the annealing furnace of 450 ~ 1200 ºC, under the high temperature furnace roller continuous conveying steel strip, steel strip surface oxide film or deposition reduction of iron filings and activation, generate Fe, Fe3O4 and FeO and other compounds, with the roller surface under the action of friction, produce very big extrusion stress, When the protective film of the roll surface is destroyed, the exposed active metal surface will weld with the activated iron powder under compressive stress, causing the roll surface to form nodule, destroying the original roughness of the roll surface, and the strip steel will be scratched by nodule, affecting the surface quality.
Nodulation of the roller surface is actually adhesion wear. In order to reduce the loss caused by nodulation to the production of steel strip, the NiCr-Cr3C2 coating can be sprayed on the roller surface by supersonic flame spraying. It has the characteristics of high temperature oxidation resistance, thermal shock resistance and wear resistance. It can make the bottom rod work continuously for a long time at high temperature and withstand the periodic thermal shock. When the operating temperature of the low roller exceeds 900ºC, a strand of Co-based alloy is sprayed.
In the metallurgical production line, a large number of conveying rollers are used to transport all kinds of steel. After long-term use, wear and tear appear, which affects the quality of steel. Co-based WC coating can be sprayed on the surface of the conveyor roller, which generally works at 450ºC and has good wear resistance and comprehensive mechanical and mechanical properties.
Supersonic flame spraying has unique advantages in the field of spraying carbide ceramics, and the metallurgical industry has a great demand for carbide cermet coating, so it has been widely used.
In addition, the sunking roller on the hot galvanized line also needs to be protected by thermal spraying. The hot galvanized sheet has good corrosion resistance, processing formability, weldability and environmental protection, etc. It is widely used in various fields such as automobiles, construction, home appliances and national defense. At present, most of the hot zinc dipping units of the steel strip in the world's iron and steel enterprises adopt the sunk-roll device. The sunk-roll and other parts of the molten zinc production line are immersed in the molten zinc solution of 450~480ºC, which is easily corroded by the zinc solution with strong activity or precipitated Fe-Al-Zn intermetallic compound nodulation, which makes the surface of the roll pitting, pits and become rough. Affects the surface quality of galvanized steel plate. In order to prevent the direct contact between liquid zinc and submerged roll alloying corrosion reaction, resulting in the surface of the steel roll coarsening and affecting the quality of galvanized steel plate, the surface of the continuous submerged roll is generally sprayed to protect the treatment. The coating materials are WC-Co, Mob-Mo and Fe-Al thermal spraying powder. The corrosion resistance of WC-Co coating in zinc solution depends on its adhesive phase. Because the diffusion corrosion channel of zinc liquid in the coating is mainly along the cobalt-rich phase, when the bonding phase composition of the coating is mainly η phase (Co3W3C and Co6W6C, etc.), η phase can effectively prevent the diffusion of zinc liquid into the coating and delay the corrosion of zinc liquid on the coating. On the other hand, the WC particle size and CO content in the coating also directly affect the corrosion resistance and service life of the coating. Coatings with small WC grains and low Co content have higher wear resistance, while their corrosion resistance in Zn solution is poor. Therefore, appropriate WC particle size and appropriate Co content should be selected to achieve better comprehensive performance. When the WC grain size is 2~4μm and the CO content is 10% ~ 17%, the coating has the best performance.
Main Performance Indicators
1, the porosity is only 0.5%,
2, the microhardness of the coating is up to 1250HV0.2,
3. The bonding strength of coating and substrate is greater than 70MPa.
4, its service life can be up to 40 ~ 50 days,
5. Surface roughness: RA0.2