A cermet tip is not the same as tungsten carbide, although they are similar. Cermet is a composite of ceramic (cer) and metallic (met) materials, typically using Titanium Carbide (TiC) or Titanium Carbonitride (TiCN), whereas Tungsten Carbide (WC) primarily uses tungsten. Cermets are often harder, more heat-resistant, and better for finishing, while tungsten carbide is tougher and more durable.
Key Differences Between Cermet and Tungsten Carbide:
- Composition: Cermets are titanium-based, while tungsten carbide uses tungsten-cobalt.
- Performance: Cermet tips offer superior wear resistance and surface finish due to reduced chemical interaction with the workpiece.
- Toughness: Tungsten carbide is generally tougher and less likely to chip compared to cermet, making it better for heavy-duty cutting.
- Best Use: Cermet is recommended for low carbon content mild steel bars while carbide tipped is recommended for stainless steel cutting, High tensile strength alloy steel and interrupted cuts like thin wall tube at elevated RPM’s.
Both materials are engineered to provide high hardness and wear resistance in cutting tools, but their distinct compositions make them suited for different applications.
Key Compositional Differences
The primary difference lies in the hard material and the binder metal used to hold it together:
- Tungsten Carbide (WC): Uses tungsten carbide particles bonded with cobalt.
- Cermet: Uses titanium carbonitride (TiCN), titanium carbide (TiC), or titanium nitride (TiN) bonded with nickel or chrome.
Performance Comparison
Choosing between the two depends on your specific project needs:
| Feature | Tungsten Carbide Tips | Cermet Tips |
| Durability | High toughness; better for interrupted cuts and heavy roughing. | Lower toughness; more brittle and prone to chipping under impact. |
| Wear Resistance | Great, but can wear faster at extremely high temperatures. | Superior wear resistance; stays sharp significantly longer than carbide. |
| Surface Finish | Good, but often requires secondary finishing or coatings. | Produces a mirror-like finish; ideal for high-speed finishing. |
| Heat Resistance | Excellent thermal conductivity to dissipate heat. | High thermal stability and chemical resistance to high temperatures. |
Summary of Best Uses
- Tungsten Carbide for cutting tubes, pipes, interrupted cuts and higher cutting speeds.
- Cermet for low to medium tensile strength solid material and heavy wall pipe, carbon alloy steel, CNC production saws.
