As the main process of carbide tool coating fabrication, cathodic arc ion plating plays an important role in modern industrial production. This paper introduces the influence of process parameter selection on the coating properties of tools by cathodic arc ion plating. The process parameters mainly include nitrogen partial pressure, negative bias pressure and arc current, and the coating properties are mainly characterized by deposition rate, phase composition, coating hardness and surface quality. It can optimize the selection of process parameters on modern industrial production.
As the main-stream of the machining coating, nitrogen-based coatings have irreplaceable advantages, such as high hardness, high strength, and good oxidation resistance recently. This paper introduces common multiple nitrogen-based coatings which including TiAlN, CrAlN, TiAlSiN, CrAlSiN and CrTiAlN coatings for cemented carbide tools. The microstructure and property of coating is depended on its chemical composition. Generally, compounds of different structures are formed between the various elements of the coating, and these have different forms of existence and properties: titanium and chromium exist in nitrides (face-centered cubic structure), aluminium solubilizes in TiN/CrN, and amorphous Si3N4 can make difference in fine grain strengthening. The Al2O3 and SiO2 can improve oxidation resistance.
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