Evaluation of Tribilogical Characteristics of Duplex Coated 31CrMoV9 Steel

Abstract

The paper resumes partial results of tribological testing of duplex coatings of tool steel. Steel samples (31CrMoV9) were nitrided and subsequently treated by PVD process. There were deposited different coatings (TiN, CrN,) with thickness 1 and 3µm. Samples were tested and characteristics like nanohardness, hardness of duplex coating, friction coefficient (pin on disc), coating thickness (Calotest), resistance against adhesive wear (Scratch test) and abrasion size (HEF) were measured. Results of chemical composition, adhesion measured by Scratch test, friction coefficient measured by "HEF" tribometer and average weight wear are summarized in this paper