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Thermal properties

  • Linear expansion coefficient
  • Thermal conductivity
  • Specific heat capacity

Linear expansion coefficient

thermal properties for carbide rotary cutters

Thermal expansion as a function of the Co content for two different temperature intervals.

As tungsten carbide has a very low linear expansion coefficient, WC-Co Cemented Carbides have values of approximately half that of ferritic and martensitic steels while the ratio to austenitic steels is about 1:3.
If titanium carbide is included, the values will be slightly higher than for straight WC-Co Cemented Carbides. This values optimizes the resistance for carbide components or carbide tools like Carbide Rotary Cutters.




Thermal conductivity

thermal properties for carbide rotary cutters

Thermal conductivity as a function of temperature, diferent microstructures and WC grain sizes.

The thermal conductivity of WC-Co Cemented Carbides is approximately twice that of unalloyed steels and one third of that of copper. The tungsten carbide grain size has a minor effect but the presence of g- phase decreases the thermal conductivity considerably. This values optimizes the resistance for carbide components or carbide tools like Carbide Rotary Cutters too.





Specific heat capacity

At room temperature, the specific heat capacity for straight WC-Co grades is about 150-350 J/(kg•°C), which is nearly half the value of unalloyed steels.