Precision Cemented Tungsten Carbide Grinding Media Balls WC-Co Cobalt Bonded
Cemented tungsten carbide, particularly the WC-Co (tungsten carbide-cobalt) alloy, is a marvel of modern engineering. Known for its exceptional toughness and versatility, this material is indispensable across various industries such as automotive, aerospace, and mining.
The primary components of cemented tungsten carbide are tungsten carbide (WC) and cobalt (Co). Tungsten carbide provides the hardness and wear resistance, while cobalt acts as a ductile binder, enhancing the toughness of the composite.
- Tungsten Carbide (WC): Known as the hard phase, WC contributes to the material's wear resistance and hardness.
- Cobalt (Co): Serving as the binder phase, cobalt enhances the toughness and ductility of the composite.
Essential for applications where high reliability is imperative, such as in motors and cutting tools.
Ability to resist plastic deformation, adjustable by cobalt content and WC grain size.
Resists fracture under dynamic or static loads, measured by the Palmqvist method.
Maintains integrity under extreme conditions with cobalt's high melting point (1493°C).
| Property | Tungsten Carbide (WC-6%Co) | Alumina (99%) | Zirconia (YTZP) | Steel (440C) |
|---|---|---|---|---|
| Density (g/cm³) | 14.6-15.0 | 3.9 | 6.0 | 7.8 |
| Hardness (HRA) | 90-92 | 80-85 | 88-90 | 60-65 |
| Fracture Toughness (MPa*m½) | 10-12 | 4-5 | 7-10 | 15-20 |
- Cutting Tools: Maintain sharpness and resist wear for machining hard materials
- Mining and Drilling: Drill bits and tools requiring high wear resistance
- Aerospace and Automotive: High precision components like engine parts
- Wear-Resistant Parts: Nozzles, guide rails, and bearings with extended service life
- WC-Ni (Nickel-Bound): Resists acids/alkalis better than WC-Co
- SiC or ZrO₂: For extreme pH (<1 or >14)
- ISO 9001, RoHS, MSDS (Material Safety Data Sheet)
- Custom certifications (e.g., ASTM B777 for WC-Co)
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