Tool grades

CVD Coating

The CVD method is a coating method inducing a chemical reaction on the base metal surface of cemented carbide. Layers are deposited onto the surface in a reactor at 900°C ~ 1100°C (1650°F-2010°F) with gas reaction at atmospheric pressure.


Since the development of TiC coating in 1969, coated grades with a single layer of TiN, TiCN, or Al2O3 have been put to practical use one after another. In the late 1970s, coated grades with double layers and then multi-layers were developed. Presently multi-layer CVD coated grades are the main trend.


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C.V.D-coated grade




Special carbide substrate

Cross section of the micro-structure