| Tungsten Carbide-Cobalt Coated valve Balls | ||
| Size Range | 1/2" to 56" (Custom sizes available) | |
| Pressure Rating | PN10-PN420 (Class150-2500) | |
| Body Material | A105, A350 LF2, A182 F304, A182 F316, A182 F321, A182 F51, A182 F53, A182 F55, A182 F60, A182 F44, A564 630 (17-4PH) INCONEL625, INCONEL718, INCONEL825, Monel 400, Monel 500 etc |
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| Core Process/Coating | ENP,HCR,STL6, STL12, STL20,Cr3C2, WC-Co, WC-Cr3C2-Ni, TiC-NiMo, SiC, CrC,ZrO2, Al2O3, Cr2O3, ZnO, TiO, Al2O3-TiO2,STL1, STL6, STL12,Ni60, Ni55, Ni45 etc. | |
| Operating Temperature Range | ≤1200°C | |
| Parameter Category | Core Technical Parameters | Standards for Determining Advanced Technological Level |
| Machining ball accuracy | ≤ 0.025 mm | ≤ 0.005 mm (Ultra-High Precision) |
| Processing ball Roundness | ≤ 0.025 mm | ≤ 0.011 mm (Micron-Level ) |
| Balls concentricity | ≤ 0.025 mm | ≤ 0.005 mm (Ultra-High Precision) |
| Other supplements | ≤ 0.4 μm | ≤ 0.1 μm (Mirror-Level) |
| Parameter Category | Core Technical Parameters | Criteria for High-End Technical Level |
| Coating Thickness Control | Thickness Uniformity | Thickness deviation at any spherical position ≤±8% (stricter than the general ±10% standard) |
| Thickness Tolerance Range | 100 - 300 μm (common range for wear-resistant layers); special ranges can be noted. No missed spraying for ultra-thin coatings (<10μm) | |
| Coating Adhesion Performance | Surface Hardness | HV 1300+ |
| Bond StrengthBond Strength | ≥80 MPa | |
| Interface PorosityInterface Porosity | <0.5% | |
| Coating Surface Quality | Surface Roughness (Ra) | ≤0.2 µm |
| Spraying Accuracy (Positioning & Coverage) | Spraying Positioning Accuracy | ±0.1mm |
Core Products: An Ultra-Hard Surface Engineered for Pure Wear
Tungsten Carbide (WC) possesses a hardness second only to diamond, while Cobalt (Co), as the binder phase, provides necessary toughness. Their combination forms one of the ultimate material systems in industrial applications for combating abrasive wear.
Redefining the Limits of Wear Life
Our Tungsten Carbide valve balls and WC valve balls feature a surface coating hardness exceeding Hv 1200, which is 3-4 times that of hardened steel. When handling highly abrasive media such as coal slurry, mineral slurry, pulp, or FGD gypsum, it dramatically reduces the wear rate of both the ball and seats, increasing overall valve life by multiples or even an order of magnitude, fundamentally changing the maintenance paradigm of frequent core component replacement.
HVOF Process: The Key to Superior Performance
Not all thermal spray can achieve the perfect performance of tungsten carbide. We specialize in the High-Velocity Oxygen Fuel (HVOF) technique. This process accelerates Tungsten Carbide-Cobalt powder to supersonic speeds under extreme heat and pressure, impacting the substrate to form the coating. The resulting HVOF Coated valve Balls offer unparalleled advantages:
Extremely High Density: Coating porosity can be below 1%, with a dense, sintered-material-like structure.
Superior Bond Strength: Mechanical interlocking and micro-metallurgical bonding from high-velocity particle impact result in coating adhesion strength far exceeding conventional flame spray.
Exceptional Coating Properties: Maximizes retention of the intrinsic hardness of the WC hard phase while ensuring uniform binder phase distribution, achieving peak comprehensive wear resistance.
Complete Core Solution for "Thermal Spray Ball Valves"
We provide not just coated balls but a matched core component solution for Thermal spray ball valves. We ensure the ball and seats employ the same or compatible WC-Co coating (WC-Co valve balls) process and material system, achieving optimal wear compatibility for the friction pair and preventing overall failure due to uneven wear of a single component.
Addressing Harsh Combined Corrosion-Wear Conditions
By adjusting the WC/Co ratio or using nickel-based alloys as an alternative binder, we can customize wear-resistant coatings for different pH corrosive environments. This allows our Tungsten Carbide-Cobalt Coated Valve Balls to also excel in complex conditions found in chemical processing or flue gas treatment, where both wear and corrosion are present.
Technical Focus: The Precision and Reliability Engineering of HVOF Coating
Transforming brittle-hard tungsten carbide into a tough, tenacious, and firmly bonded surface coating is the ultimate test of process control capability.
Precise Matching of Powder Science & Process Parameters:
We select specialized powders with specific particle sizes and WC/Co ratios based on service needs (e.g., impact strength, corrosion resistance). We meticulously control over a hundred parameters of the HVOF system-fuel ratio, powder feed rate, spray distance-tailored to the powder characteristics, ensuring highly consistent coating performance across all batches.
Stress Control & Substrate Protection:
High-velocity particle impact generates significant internal stress. We systematically manage coating stress through optimized spray paths, controlled interpass temperatures, and dedicated post-spray heat treatment processes to prevent micro-cracking and protect the relatively softer substrate from distortion or thermal damage.
Post-Coating Precision Finishing to Mirror Grade:
The as-sprayed coating surface has a rough, lamellar structure. We employ diamond grinding wheels for precision grinding, achieving not only micron-level dimensional tolerances but also a mirror-grade surface finish of Ra < 0.2 μm. This ultra-smooth surface further reduces flow resistance and particle adhesion, which is key to achieving long-life, low-torque sealing.
Why Must You Choose TongBall's Tungsten Carbide Coating Solution for Extreme Wear Applications?
In-Depth Practitioners of HVOF Technology:
We understand that 90% of a WC coating's performance depends on the execution level of the HVOF process. We possess a mature process database and extensive field problem-solving experience, ensuring laboratory performance translates perfectly into outstanding field performance.
Providing the Complete Value Chain from Powder to Finished Product:
We do not rely on external coating services. We autonomously control the entire process from powder selection, process development, spray application, to final precision grinding. This ensures quality traceability and cost optimization.
Committed to Solving "Unacceptable Wear":
The production downtime cost for our clients far exceeds the cost of the components themselves. Therefore, our Tungsten Carbide-Cobalt Coated Valve Balls are not merely a product but a reliability commitment aimed at maximizing equipment uptime and minimizing unplanned shutdowns.
When Wear Cost Has Become an Unavoidable Burden in Your Operations
If valve maintenance, replacement, and downtime losses due to wear are eroding your production efficiency and schedules, a fundamental solution based on materials science is urgently needed. TongBall's Tungsten Carbide-Cobalt Coating Technology represents one of the highest levels of industrial wear-resistant surface engineering, aiming to transform the most challenging wear problems into predictable, manageable routine wear.
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