In order to understand substrate effects on mechanical properties of CrN coating, deposition was carried out on DIN 1.7225, 1.2067, 1.2379, 1.2842 and K390 quality steels with cathodic arc method. After heat treatment, hardness values were measured as 55-57 HRc for all type of steels. CrN coating was deposited on the heat treated steel substrates in the range 450-500°C temperature by cathodic arc Physical Vapor Deposition (PVD) method. After CrN coating process, characterization of the coatings on the steel substrates was carried out. For this purpose; surface of the coating was examined by Scanning electron microscopy (SEM-EDX), adhesive strength between the coating and steel was measured by applying scratch test. Dynamic microhardness tests were conducted to measure the microhardness of the coating. Furthermore, thickness of the coating was measured by microabrasion test. Adhesion strength of the coating was qualified and classified by applying Rockwell C adhesion test. As a result of the analysis and the applied tests; When the molar ratios of elements were calculated by EDX wt%, the average CrN formation can be evaluated as Cr0.21N0.79. adhesion CrN coating on the surface changed differently according to substrate. Better mechanical properties were measured when coating is carried out on DIN 1.2379 steel. (ORCID ID: 0000-0002-8895-7821)
Anahtar Kelimeler: PVD, CrN Coating, Scratch, Microindentation, Adhesion Strength
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