High-temperature erosion of Fe-based coatings reinforced with cermet particles

Abstract

High-velocity oxy-fuel sprayed, iron alloy-based powder coatings, reinforced with tungsten carbide-cobalt (WC-Co) and titanium carbide-nickel molybdenum (TiC-NiMo) cermet particles, are compared under high-temperature abrasive-erosive wear conditions. Both WC-Co and TiC-NiMo particles underwent fracture, as well as dissolution, during the spraying process, but in the case of WC-Co particles this process was remarkably less intensive. Under the low impact angle conditions, the WC-Co particle-reinforced coating exhibited 1.1 times lower wear than the TiC-NiMo particle-reinforced coating because of the larger amount of the reinforcement remaining. Under the normal impact angle conditions, the WC-Co particle-reinforced coating showed 1.2 times lower wear than the TiC-NiMo particle-reinforced coating because of the resulting larger size of the WC-Co reinforcement and a more ductile matrix.

High-Temperature Erosion of SiC-NiCrAlY/Cr3C2-NiCr Coating

“…Erosion wear is the progressive material loss from a solid surface due to mechanical interaction between the surface and a fluid (multicomponent fluid, impinging liquid, or solid particles) [1]. This wear phenomenon also occurs under high-temperature conditions in various industries such as casting, petrochemical, garbage incineration, and power generation [2][3][4]. High-velocity oxyfuel (HVOF) coatings are commonly applied to mitigate this type of wear by spraying materials such as WC-Co and Cr 3 C 2 -NiCr.…”

“…High-velocity oxyfuel (HVOF) coatings are commonly applied to mitigate this type of wear by spraying materials such as WC-Co and Cr 3 C 2 -NiCr. However, these materials show operation limits at temperatures of 450-550 • C and 800-900 • C, respectively [4][5][6][7]. For this reason, the use of high-temperature alloys that are Fe-based, Ni-based, and MCrAlY (M=Ni, Co or NiCo), and the mixture of these alloys with different ceramics and cermets such as TiC-NiMo, CrB, Cr 3 C 2 , WC-Co, etc., have been proposed [4,[8][9][10][11][12].…”

High-temperature erosion behaviour of plasma-sprayed NiCrBSi–graphite coatings

“…The plasma-sprayed coating generally consists of overlapping splats which is more or less similar to the morphology of the substrate or to that of previous splats. Plasma-sprayed coatings are usually anisotropic and their erosion rates tend to depend on impact angle [3][4][5][6]. Kingswell et al [7] and Zhang et al [8] have reported that the erosion mechanism in plasmasprayed alumina coating is different from those in bulk materials.…”

“…The plasma-sprayed coating generally consists of overlapping splats which is more or less similar to the morphology of the substrate or to that of previous splats. Plasma-sprayed coatings are usually anisotropic and their erosion rates tend to depend on impact angle [3-6]. Kingswell et al.…”

THE ANALYSIS OF THE STRUCTURE OF ELECTROEXPLOSIVE COATINGS OF THE TiC-Ni SYSTEM ON THE DIE STEEL AFTER THE ELECTRON-BEAM TREATMENT

“…Микроструктура и коррозионная стойкость наночастиц Ti, армированных Ni-Ti композитными покрытиями, полученных методом электроосаждения, изучены в [9], электродугового напыления -в [10]. Износостойкость покрытий системы TiC-NiMo и Cr 3 C 2 -Ni, армированных FeCrSiB, полученных методом высокоскоростного газопламенного напыления, обсуждается в [11], а высокотемпературная эрозия покрытий на основе железа, армированных керметными частицами, -в [12]. Исследование микроструктуры и свойств покрытий на стали 45, нанесенных методом электроискрового осаждения электродами на основе TiC-Ni-Mo, произведено в [13].…”