Synthesis, Characterization and Application by HVOF of a WCCoCr/NiCr Nanocomposite as Protective Coating Against Erosive Wear
Journal Title: Tribology in Industry - Year 2018, Vol 40, Issue 3
Abstract
The scope of this work is to synthetize and characterize a WCCoCr/NiCr nanocomposite evaluating its application as protective coating against erosive wear when applied by High Velocity Oxygen Fuel (HVOF). The composite was formed by carbide of tungsten-cobalt-chrome (WCCoCr) processed by high energy milling and a metallic matrix of nickel-chrome (NiCr). The milled material was added to the NiCr in the fraction of 5%wt. The powders were investigated by X-ray diffraction and and scanning electron microscopy, analysing particle size distribution and surface area. The protective layers were deposited by HVOF and evaluated for their microhardness, microstructure, porosity, and erosive wear. Their microstructure showed lamellar character, with a low level of oxides and porosity between 0.5 % and 1 %. The coating formed by NiCr and WCCoCr milled for 3 hours presented microhardness of 635 HV and erosion rates 50 % smaller than the commercial coating.
Authors and Affiliations
W. C. Giaglianoni, M. A. Cunha, C. P. Bergmann, C. Fragassa, A. Pavlovic
Keywords
Related Articles
- EP ID EP407301
- DOI 10.24874/ti.2018.40.03.13
- Views 78
- Downloads 0
Multi-Criteria Analysis of Laser Cut Surface Characteristics in CO2 Laser Cutting of Stainless Steel
In this paper an approach for multi-criteria analysis of laser cut surface characteristics using multi-criteria decision making (MCDM) approach was presented. Laser cutting experiment was conducted based on Taguchi’s L27...
Modeling and Simulated Annealing Optimization of Surface Roughness in CO[sub]2[/sub] Laser Nitrogen Cutting of Stainless Steel
This paper presents a systematic methodology for empirical modeling and optimization of surface roughness in CO2 laser nitrogen cutting of stainless steel. The surface roughness prediction model was developed in terms of...
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...
Effects of Fiber Fraction on the Mechanical and Abrasion Properties of Treated Cow Hair Fiber Reinforced Polyester Composites
Fiber reinforced polyester composites were developed by reinforcing polyester resin with Cow hair fibers obtained from the tail of Zebu breed cattle in Nigeria. Composites were fabricated using hand lay-up techniques in...
Jenkins Model Based Ferrofluid Lubrication of a Curved Rough Annular Squeeze Film with Slip Velocity
This paper deals with the combined effect of roughness and slip velocity on the performance of a Jenkins model based ferrofluid squeeze film in curved annular plates. Beavers and Joseph’s slip model has been adopted to i...