Anti-Wear Coatings by China Suppliers: HVOF Spraying Factory Solutions for All Industries
Product Description
High Velocity Oxygen Fuel (HVOF) is a high-end wear-resistant and corrosion-resistant strengthening process in the field of industrial surface engineering.
This process uses fuels such as kerosene and propane with high-pressure oxygen as a medium. The mixture is thoroughly mixed and intensely combusted in the combustion chamber of the spray gun, generating a high-speed flame with speeds exceeding Mach 5 (temperature 2600–3200℃). High-performance powders such as tungsten carbide and nickel-based alloys are fed into the flame, where they are instantly melted and accelerated to ultra-high speeds of 500–800 m/s. This powerful kinetic energy impacts the workpiece surface, forming an extremely dense and highly adhesive functional coating through a combination of metallurgical bonding and mechanical adhesion.
Customized specifically for core wear parts of petroleum machinery (plugs, valve seats, gates, valve cores, valve discs, etc.), it is perfectly adapted to the extreme working conditions of drilling, well workover, and oil and gas transportation, such as high pressure impact, sand-containing mud erosion, acid and alkali corrosion, and high temperature friction. It solves the problems of rapid wear, short life and seal failure of parts from the root, and is the core surface treatment solution to improve the reliability of petroleum machinery equipment.
Product Specifications
| Process Type | High-Voltage High-Frequency Flame (HVOF) Coating |
| Common Coating Materials | Tungsten carbide cobalt (WC-Co), tungsten carbide chromium cobalt (WC-Cr-Co), nickel-based alloys (Ni60/Ni60A), cobalt-based alloys |
| Coating Thickness | 0.03–0.5mm (customizable to workpiece requirements) |
| Hardness | HRC75 |
| Bonding Strength | ≥70MPa |
| Porosity | <1% |
| Operating Temperature Resistance | -60℃ ～ +650℃ |
| Applicable Substrate Materials | 42CrMo, 35CrMo, 2Cr13, carbon steel, stainless steel, alloy structural steel |
| Machining Accuracy | Precision grinding after coating; dimensional tolerances up to ±0.01mm |
Product Features
1
Superior Wear and Erosion Resistance
The coating boasts a hardness of HRC75, resisting high-speed erosion from rock cuttings and silica sand in drilling mud. Its wear resistance is 8–15 times that of ordinary quenching and electroplating processes, significantly extending the service life of components.
2
Extremely Dense and Corrosion-Resistant
With a porosity of <1%, there are no leakage channels, effectively blocking corrosive media such as oil and gas, drilling fluids, and saline water, preventing substrate rust and corrosion failure.
3
Strong Bond and No Peeling
The coating achieves a high-strength bond with the substrate, remaining resistant to peeling, cracking, and flaking even under high-pressure impact and high-frequency opening and closing conditions, ensuring maximum stability.
4
Excellent High-Temperature Resistance
It can operate continuously in environments ranging from -60℃ to +650℃ without softening or deformation, making it suitable for high-temperature oil and gas well operations.
5
Controllable Dimensional Accuracy
Precision spraying combined with subsequent fine grinding processes strictly guarantees the assembly accuracy of components, meeting the high-precision sealing requirements of petroleum machinery valve assemblies.
6
Excellent Adaptability to Various Working Conditions
Simultaneously withstands multiple extreme working conditions including wear, corrosion, impact, and high temperatures, perfectly matching the core component requirements of oil drilling, mud pumps, and manifolds.
7
Outstanding Overall Cost-Effectiveness
Reinforced components extend lifespan by 5–10 times, significantly reducing equipment maintenance and downtime replacement costs, and improving operational efficiency.
Product Packaging
Standard Export Packaging
📦 Inner: Rust-proof protective bag
📦 Outer: Fumigation-free plywood case or export carton
Shockproof, moisture-proof and anti-corrosive, ensuring safe ocean transportation.
Product Transportation
Shipping Methods
- Ocean Transportation
- Overland & Rail Services
Frequently Asked Questions (FAQ)
Q
What is HVOF coating and how does it work?
HVOF (High Velocity Oxygen Fuel) is a thermal spray process that uses a high-pressure oxygen-fuel mixture to generate a supersonic flame exceeding Mach 5. Coating powders such as tungsten carbide are fed into this flame, melted, and propelled at 500–800 m/s onto the workpiece surface, forming an extremely dense, strongly bonded functional coating.
Q
What coating materials are available for HVOF spraying?
Common HVOF coating materials include tungsten carbide cobalt (WC-Co), tungsten carbide chromium cobalt (WC-Cr-Co), nickel-based alloys (Ni60/Ni60A), and cobalt-based alloys. The material selection depends on the specific wear, corrosion, and temperature requirements of the application.
Q
What substrate materials are compatible with HVOF coating?
HVOF coatings are compatible with a wide range of substrate materials, including 42CrMo, 35CrMo, 2Cr13, carbon steel, stainless steel, and alloy structural steel — all commonly used in petroleum machinery components.
Q
How thick can the HVOF coating be applied, and what dimensional accuracy is achievable?
Coating thickness ranges from 0.03mm to 0.5mm and can be customized to specific workpiece requirements. After coating, precision grinding is performed to achieve dimensional tolerances of up to ±0.01mm, meeting the high-precision sealing demands of petroleum machinery valve assemblies.
Q
How does HVOF coating compare to traditional electroplating or quenching processes?
HVOF coating offers 8–15 times greater wear resistance compared to conventional quenching and electroplating processes. It also provides superior corrosion resistance (porosity <1%), stronger bonding strength (≥70MPa), and a wider operating temperature range (-60℃ to +650℃), making it far more durable for extreme industrial environments.
Q
What are the typical applications of HVOF coating in petroleum machinery?
HVOF coatings are widely applied to core wear parts of petroleum machinery, including plugs, valve seats, gates, valve cores, and valve discs. They are engineered to withstand high-pressure impact, sand-containing mud erosion, acid and alkali corrosion, and high-temperature friction encountered in drilling, well workover, and oil and gas transportation operations.