Open AccessThe Cavitation Resistance of WC-CoCr Cermet Coating Deposited by HVOF for Hydraulic Application
Author(s) -
Qian Huang,
Enwei Qin,
Wenli Li,
Bo Wang,
Chenyang Pan,
Shuhui Wu
Publication year - 2021
Publication title -
journal of thermal spray and engineering
Language(s) - English
Resource type - Journals
ISSN - 2582-1474
DOI - 10.52687/2582-1474/312
Subject(s) - cermet , coating , thermal spraying , cavitation , materials science , cavitation erosion , metallurgy , microstructure , composite material , martensite , ceramic , physics , mechanics
Thermal spray is a versatile technique for enhancing the cavitation resistance of hydraulic water passage components, especially in on-site repair situation. Based on the application in hydraulic components, a WCCoCr cermet coating was deposited by high velocity oxygen fuel spraying. The microstructure and hardness were characterized, and the cavitation was studied by ultrasonic vibratory system according to ASTM G32 standard. The coating shows superior anti-cavitation behavior in term of mass weight loss compared with the martensite stainless steel. The cavitation erosion mechanism is elaborated with wrinkles and craters observed on the worn surfaces, and correlated with the incubation and accelerating stages.