Tribology Study of High-Technological Composite Coatings Applied Using High Velocity Oxy-Fuel

9th International Conference on Tribology

Kandeva, M.^1 ; Grozdanova, T.^2 ; Karastoyanov, D.^3 ; Ivanov, Pl^1 ; Kalichin, Zh^4

Faculty of Industrial Engineering, Tribology Center, Technical University of Sofia, Sofia, Bulgaria^1

Space Research and Technologies Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria^2

Institute for Information and Communication Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria^3

SciBulCom 2, Ltd., Nezabravka Str., 7, Sofia

1113, Bulgaria^4

关键词: Abrasive particles;    Differential wear;    Friction coatings;    High velocity oxy fuel;    HVOF;    Powder superalloy;    Substrate temperature;    Wear intensities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/295/1/012025/pdf
DOI  :  10.1088/1757-899X/295/1/012025

来源: IOP

【 摘 要 】

In the work are studied the differential parameters of wear and wear resistance of high-tech composite coatings of powder superalloys with nickel matrix, WC-12Co and mixed compositions. Coatings were created and applied to a substrate of steel with a different flame velocity - 700 m/s and 1000 m/s without preheating the substrate and with preheating the substrate to 650° C. The wear is carried out with a thumb-disk tribotester under dry surface friction with fixed black corundum abrasive particles. Comparative results were obtained for the microstructure and texture of the pre- and post- friction coating, the porosity, roughness, hardness, the dependence of mass wear, the speed and wear intensity and the wear resistance of the coatings on the number of friction cycles. Influence of the flame rate and substrate temperature on wear resistance and differential wear parameters has been determined.