Effect of contact pressure on wear resistance of AISI H13 tool steels with chromium nitride and hard chromium coatings

Enhanced chromizing kinetics of tool steel by means of surface mechanical attrition treatment

“…Due to the enormous quantities of products and the relatively short service life of tools, even small improvements in their durability would bring a large economic benefit. In the past two decades, various surface modification processes have been developed to improve their surface mechanical and tribological properties, for example gas and plasma nitriding [1,3,4], electroplating hard chromium [5], physical and chemical vapour deposition (PVD and CVD) of hard ceramic coating [5,6] and duplex treatments [2,[6][7][8].…”

“…This is mostly because they combine the hardening of the substrate by plasma nitriding with the subsequent PVD or CVD of a very hard coating (i.e. CrN or TiN, with a hardness of ∼20 GPa [5,9]), reducing the hardness gradient between the coating and the substrate. As a result, the mechanical and tribological properties of the tools are improved and their durability is increased significantly relative to those treated by using the traditional processes, such as the most commonly used gas nitriding (with a surface hardness of ∼10 GPa [1]).…”

Surface Engineering for Tribology

“…They form during the production process because of the co-deposition of hydrogen that result in the formation of hexagonal chromium hydride. This hydride has a tendency to release hydrogen gas that induces the formation of residual tensile stress and hence vertical cracks [22]. Hydrogen can also diffuse into the substrate inducing its embrittlement.…”

Surface Characterization and Corrosion Resistance of 36Cr-Ni-Mo4 Steel Coated by WC-Co Cermet Electrode Using Micro-Electro Welding

“…Also, the corrosion/wear resistance of Chromium Nitride/ hard Chromium coating was better than both Chromium Nitride and primary hard Chromium coating. Chiu et al [13,14] also indicated that Chromium Nitride coatings have better wear resistance than hard Chromium coatings. Since the adhesion of the Chromium Nitride coating and substrate is low therefore the wear resistance of the Chromium Nitride coating is reduced when the applied load is higher than the critical value [15].…”