Wear resistance of HVAF-sprayed hardmetal coatings
Tutkimustuotos: Konferenssiesitys, posteri tai abstrakti ›
|Tila||Julkaistu - 2018|
|Tapahtuma||European Conference in Nanofilms 2018 - Cranfield University, Cranfield, Iso-Britannia|
Kesto: 20 maaliskuuta 2018 → 22 maaliskuuta 2018
|Conference||European Conference in Nanofilms 2018|
|Ajanjakso||20/03/18 → 22/03/18|
The wear resistance of metallic components can be significantly improved by applying a thermally sprayed hardmetal coating layer on the surface. For that reason, thermally sprayed hardmetal coatings, e.g. Cr3C2- and WC-based, have established their place as the industrial standard solution for numerous demanding applications. For instance, thermally sprayed Cr3C2-25NiCr coatings are known to have good wear, corrosion and oxidation resistance. The coating properties and resulting component performance can be effectively tailored by thermal spray processing. Novel high kinetic thermal spray processes, e.g. modern high velocity air-fuel (HVAF) spray process, have proven to produce high quality coatings. In the HVAF spray process, the particle heating and acceleration can be efficiently controlled by changing process parameters. This, in turn, affects the coating characteristics. Wear properties such as abrasion, sliding, erosion and cavitation erosion resistance of the HVAF sprayed hardmetal coatings have been extensively studied and compared to traditional high velocity oxygen-fuel (HVOF) sprayed hardmetal coatings. Higher particle velocities and lower process temperatures in the HVAF spray process produce dense coatings with improved toughness and more homogenous coating structure, resulting in enhanced wear protection and performance in several wear conditions.