A Review on High-Velocity Oxy-Fuel (HVOF) Coating Technique

Anusha, Kalluri; Routara, Bharat Chandra; Guha, Spandan

doi:10.1007/s40033-022-00434-x

Cited by 4 publications

(1 citation statement)

References 135 publications

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“…Among them, the high velocity oxygen-fuel (HVOF) spray technology is often used to prepare tungsten carbide and other cemented carbide coatings due to its unique characteristics of moderate flame temperature and fast gas flow rate [5,6]. Due to their superior wear resistance and environmentally friendly properties, these coatings are promising for replacing hard chromium on mechanical surfaces such as aircraft landing gear [7], rice harvesting blades [8], drilling rigs [9] etc., which means the HVOF spray technology has extremely important engineering value for improving the service life of equipment and reducing production costs [10,11]. Wu et al [12] investigated the effects of different oxygen/fuel ratios in HVOF on the velocity and temperature evolution of in-flight particles in correlation with the performance of the resulting WC-CoCr coating.…”

Section: Introductionmentioning

confidence: 99%

Characteristic Analysis and Coating Application of the Innovative HVOF System Based on the Digital Model

Yan,

Yuan,

et al. 2024

Processes

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In view of the poor working conditions, high cost and time-consuming parameter design of the traditional spray process, an innovative HVOF thermal spray system based on the digital model has been established by this study to improve coating performance and optimize scheme design rapidly. In particular, the digital model of the oxygen/kerosene HVOF spray system is designed on the AMESim multidisciplinary simulation platform for the first time, and the engineering prototype has been successfully developed. Thus, an efficient design method based on the digital model was proposed, according to which the spray control parameters such as oxygen and kerosene flow are obtained conveniently under a combustion chamber pressure of 1.0 MPa and 2.0 MPa, respectively. The error between the simulation and experiment results was generally less than 5%, and the dynamic characteristics of the key components in the actual spray system were well predicted, suggesting that the dynamic response time of the system would generally less than 0.7 s. Additionally, the WC-12Co coatings were deposited under the working conditions of W1.0 and W2.0, respectively, the microhardness of the coating increased about 23% and the corresponding volume wear rate decreased about 18%. The results show that the increase of the pressure of the combustion chamber can further improve the coating performance, which also verifies the feasibility and reliability of the design method. It was concluded that the innovative HVOF system based on the digital model is of great theoretical value and application significance for predicting spray process parameters conveniently and providing excellent coating performance.

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