DURMAT® WC-Co powder
Protection against abrasive wear
The increasing hardness of the nanoscale hard alloy with the decreasing WC insert grain size reduces the Wear due to abrasion clearly. The harder carbide granules offer greater resistance to abrasion. The Wear progress is significantly slower because the binder metal layers between the fine-grained hard material crystallites are extraordinarily thin and thus more difficult to wash out. Because of this structural feature, only very small hard material particles are torn out of the microstructure composite.
The Spherical shape represents another Protection which is further stabilized by the small particle size - small particles require much more energy for further fragmentation and size reduction than coarse particles.
Protection against corrosion wear
Also with the Corrosive wear occurs a characteristic, higher Wear resistance on. As a result of the nanostructure and, in particular, the significantly reduced binder metal interlayer, the cobalt is only reached with difficulty by the corrosion media, which leads to considerable Wear delay leads. Because, in turn, only the smallest hard material particles break out, the corrosive erosion is greatly slowed down.
Since in most applications abrasive and corrosive wear are almost impossible to separate, the achievable property improvements for both wear attacks require a nanostructured carbide the better choice.
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