A study on the tribological behavior of hybrid and all-steel rough sliding contacts

Abstract

Hybrid bearing is a kind of bearing that uses ceramic materials instead of steel and other metal materials as rolling elements. It is often used to reduce (i.e., rolling or sliding) friction resistance. Although many published works have shown that hybrid bearings are more effective than ordinary bearings in reducing friction resistance, improving service life, and reducing the occurrence of bearing failure, many few works have been focused on the tribological properties of hybrid bearings only under sliding friction conditions. Therefore, it is crucial to understand the tribological behavior of the bearing materials to evaluate the sliding tribological process. In this paper, the tribological properties of silicon nitride-bearing steel friction pair (Si3N4-GCr15 pair) and bearing steel-bearing steel friction pair (GCr15-GCr15 pair) under oil lubrication were experimentally studied. An optical three-dimensional (3D) reconstruction method was used to investigate the microscopic and 3D morphologies of the friction pairs during the wear evolution process. The results show that the changing trends of the micrograph, 3D topography, friction coefficient, and surface roughness are consistent. A wear failure evaluation model was built based on the data extracted from the worn surface morphology. The model indicated that the friction performance of the Si3N4-GCr15 pair is better than that of the GCr15-GCr15 pair. The mechanism of friction performance of different friction pairs under lubrication conditions is studied, which provides good reference for the design of subsequent hybrid bearings.

Experiment and simulation analysis of tribological and dynamic characteristics in aeroengine hybrid ceramic bearing

“…The simulation analysis of hybrid ceramic bearings is carried out by using ANSYS/LS-DYNA explicit dynamic analysis software. The material parameters are shown in Table 5, and the more material properties of friction pairs refer to the previously published paper (Long et al , 2023). The contact between components is defined as automatic surface-to-surface contact, the contact stiffness is selected as 0.15, the loading constraints in the finite element mesh model are shown in Table 6, the friction factors of the contact surface are shown in Table 7 and the friction setting between bearing components is the face-to-face friction contact.…”

“…At the same time, the friction torque and load sensors of the ball-disc wear test rig monitor the wear-related parameters online and in real time during the friction process. The specific experiment preparation, experiment test and result analysis refer to the previously published papers (Long et al , 2023; Li et al , 2021).…”

“…The specific test procedure is shown in Table 1. The 3D reconstruction and roughness measurement are conducted on the sample surface to explore the wear performance of friction pairs of different materials (Long et al , 2023; Li et al , 2021).…”

Study on wear behavior and mechanism of 6007 Si3N4 full-ceramic ball bearing under different load conditions

“…Takabi et al 18 considered the dynamic characteristics of radially loaded roller bearings at high loads and low speeds with different surface roughnesses, and the increase in radial load resulted in a proportional increase in wear rate and an exponential increase in heat generation. Long et al 19 investigated the tribological properties of Si 3 N 4 -bearing steel friction pairs and bearing steel-bearing steel friction pairs under oil lubrication. Vrcˇek A et al 20 investigated the extent and morphology of surface damage of different bearing steels in disk-to-disk contact under reduced lubrication conditions.…”