Wear Micro-Mechanisms of Composite WC-Co/Cr - NiCrFeBSiC Coatings. Part II: Cavitation Erosion
Journal Title: Tribology in Industry - Year 2014, Vol 36, Issue 4
Abstract
Composite coatings with five different proportions of WC-Co/Cr and NiCrFeBSiC components were deposited on stainless steel by HVOF spraying. Cavitation erosion tests were performed and the material removal micro-mechanisms were identified by SEM of both the eroded areas and the specimens’ cross-sections. Waves’ propagation and deflection at the weak interfaces within the coatings resulted in local tensile stresses perpendicular to the interface direction that eventually led to material removal. Such weak interfaces are the boundaries of the carbide particles with the metal binder within the same splat, those between splats along the same layer and those between successively deposited layers.
Authors and Affiliations
D. Kekes , P. Psyllaki , M. Vardavoulias , G. Vekinis
Keywords
Related Articles
- EP ID EP110967
- DOI -
- Views 119
- Downloads 0
Simulation of Anti Wear Performance Using a Modified Brugger Test Set Up
Modern hydraulic oils have to fulfill a broad variety of parameters limitations to guarantee a proper system performance throughout a considerable lifetime. A comprehensive test of the liquids nowadays just can be perfor...
Investigation of Wear Coefficient of Manganese Phosphate Coated Tool Steel
In recent years the properties of the coating in terms of wear resistance is of paramount importance in order to prevent the formation of severe damages. In this study, Wear coefficient of uncoated, Manganese Phosphate c...
Abrasive Wear Resistance of the Iron- and WC-based Hardfaced Coatings Evaluated with Scratch Test Method
Abrasive wear is one of the most common types of wear, which makes abrasive wear resistance very important in many industries. The hardfacing is considered as useful and economical way to improve the performance of compo...
Influence of Combined Hard and Fine Machining on the Surface Properties of Cemented Carbides
As a result of recent developments in cold forging cemented carbides are increasingly used as tool materials. Due to their high hardness only electrical discharge machining (EDM) and grinding are suitable for tool machi...
Influence of the Lubricant Type on the Surface Quality of Steel Parts Obtained by Ironing
If it is needed to achieve a higher strain rate during the ironing process, which is possible without inter-stage annealing, the ironing is performed in succession through multiple dies. During that process, changes of f...