For wear or corrosion protection of cutting tools in wood machining, the application of coatings is actually not common, but some previous works showed their efficiency. In fact, the coatings increase the life of the cutting tools, but on the other side their adhesion appears not sufficient.
In this paper a review of several proposals of coatings on a sintered tungsten carbide substrate tools are presented. During chip removal process temperature arises, the tool can be cooled with air only, and problems of coatings life, delaminating, arise with corrosion phenomena if some types of wood are worked.
Finally a new coating process ALD (Atomic Layer Deposition) is proposed to test. The coating process is a multi layer deposition on a sintered tungsten carbide substrate that should over pass the above mentioned problems.
