Open AccessIncreasing the wear resistance of the pump-controlled hydraulic drive units
Author(s) -
Diana Hlushkova,
Grygoriy Avrunin,
Y. V. Ryzhkov,
Oleksandr Voronkov,
A.I. Stepanuk,
Anastasiya Hnatiyk
Publication year - 2021
Publication title -
vestnik harʹkovskogo nacionalʹnogo avtomobilʹno-dorožnogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2521-1773
pISSN - 2219-5548
DOI - 10.30977/bul.2219-5548.2021.94.0.80
Subject(s) - coating , materials science , ball (mathematics) , composite material , wear resistance , metallurgy , indentation hardness , diffractometer , corrosion , microstructure , scanning electron microscope , mathematics , mathematical analysis
Due to the lack of 63.5 mm balloons in Ukraine in the first layout of Hop-900 hydraulic transmission sample, the balls of the PBG company (Precision Ball and Gauge Co., England) were used. However, the trials of hydraulic transmission showed increased wear and cracks on the surface of the balls. Goal. The purpose of the work is to increase the wear resistance of the units of a pump-controlled hydraulic drive. Methodology. The coating on the TICRN ball was carried out at the Bu-Lat-3T installation. The coating modes were chosen using a methodology for mathematical planning of an experiment by evaluating microhardness of molded coating and the material use factor. Metallographic studies of the structure of the materials studied and sprayed coatings were performed on the digestive and non-digestive grinds on the MIM-8M microscope. The phase composition of the spray coatings was determined on a Don-1.5 diffractometer in monochromatic CUKα radiation. Results. Following the wear resistance of all investigated materials showed the largest wear resistance of the balls with ion-plasma coating on the surface. Originality. The tests of the samples of radial ball-piston hydraulic transmission of GOP-900 type allowed to conclude that their reliability and further improvement is largely due to the reliability of the piston ball, to which there are high requirements for wear resistance, minimum volume of force and temperature deformation. Practical value. Taking into account the negative experience of using imported steel balls from chrome steel, positive experience of using balloons from Steel SH-15CG, mastered by the production of OJSC HARP, and at the same time, the need to increase the heat resistance and wear resistance of balls should be considered as promising research when using beads from powder, rapid steels of type P6M5F3-MP, ceramic balls having high strength properties.