Experimental Study on Titanium Coating Carbide Drill Cutting Nickel-Base Superalloy

A nickel-base superalloy drilling comparison test was carried out with a carbide drill of the Chinese brand YG10, which was selected and coated with TiN coating, AlTiN coating and TiAlSiN coating. Analysis of drill life, drilling force, drilling temperature, drill wear and machined surface quality were carried out. It can be seen that both TiN coating and AlTiN coating can prolong the tool life of the carbide drill YG10 when drilling nickel-base superalloy GH4169. In contrast, the TiAlSiN-coated drill has poor hardness and is easy worn, which is not suitable for processing nickel-base superalloy which has high hardness and strength. Adhesive wear is the main form of coated drill wear. As the coated drill number of drilling holes increases, the adhesion increases. Coated drills can reduce the machined surface roughness of a workpiece and improve the machined quality.